In the Linux kernel, the following vulnerability has been resolved: NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg In nfsd4_add_rdaccess_to_wrdeleg, if fp->fi_fds[O_RDONLY] is already set by another thread, __nfs4_file_get_access should not be called to increment the nfs4_file access count since that was already done by the thread that added READ access to the file. The extra fi_access count in nfs4_file can prevent the corresponding nfsd_file from being freed. When stopping nfs-server service, these extra access counts trigger a BUG in kmem_cache_destroy() that shows nfsd_file object remaining on __kmem_cache_shutdown. This problem can be reproduced by running the Git project's test suite over NFS.

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:61887 advisory.

    * kernel: seccomp: passthrough uretprobe systemcall without filtering (CVE-2025-21834)
      * kernel: ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv() (CVE-2026-23003)
      * kernel: netfilter: nf_tables: Fix for duplicate device in netdev hooks (CVE-2026-43454)
      * kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)
      * kernel: bonding: alb: fix UAF in rlb_arp_recv during bond up/down (CVE-2026-45970)
      * kernel: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120)
      * kernel: iommu/amd: Fix clone_alias() to use the original device's devid (CVE-2026-53053)
      * kernel: NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg (CVE-2026-53026)
      * kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)
      * kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)
      * kernel: mm/huge_memory: update file PMD counter before folio_put() (CVE-2026-53189)
      * kernel: mm/list_lru: drain before clearing xarray entry on reparent (CVE-2026-53153)
      * kernel: pNFS: Fix use-after-free in pnfs_update_layout() (CVE-2026-63800)
      * kernel: nfsd: fix posix_acl leak on SETACL decode failure (CVE-2026-53397)
      * kernel: nfsd: release layout stid on setlease failure (CVE-2026-53399)
      * kernel: NFSv4/flexfiles: reject zero filehandle version count (CVE-2026-53392)
      * kernel: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr (CVE-2026-53391)
      * kernel: net: mana: validate rx_req_idx to prevent out-of-bounds array access (CVE-2026-64018)
      * kernel: smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() (CVE-2026-64136)
      * kernel: netfilter: ipset: fix race between dump and ip_set_list resize (CVE-2026-64189)
      * kernel: nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page (CVE-2026-64320)
      * kernel: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() (CVE-2026-64438)
      * kernel: crypto: qat - validate RSA CRT component lengths (CVE-2026-64304)
      * kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC (CVE-2026-64298)
      * kernel: ALSA: virtio: Validate control metadata from the device (CVE-2026-64490)
      * kernel: mm: shrinker: fix shrinker_info teardown race with expansion (CVE-2026-64418)
      * kernel: smb: client: fix change notify replay double-free (CVE-2026-64384)
      * kernel: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count (CVE-2026-64277)
      * kernel: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count (CVE-2026-64276)
      * kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480)
      * kernel: mm/khugepaged: write all dirty file folios when collapsing (CVE-2026-68086)
      * kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation     (CVE-2026-68166)
      * kernel: locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() (CVE-2026-72069)
      * kernel: nvmet-auth: reject short AUTH_RECEIVE buffers (CVE-2026-72130)
      * kernel: ceph: give up on paths longer than PATH_MAX (CVE-2024-53685)
      * kernel: ceph: fix memory leaks in ceph_mdsc_build_path() (CVE-2026-43419)
      * kernel: ceph: add a bunch of missing ceph_path_info initializers (CVE-2026-43408)


    Bug Fix(es) and Enhancement(s):

      * AlmaLinux 10: s390: Revert support for DCACHE_WORD_ACCESS [almalinux-10.2.z] (JIRA:AlmaLinux-188180)
      * qede: build_skb failure causes off-by-one BD ring corruption and kernel panic [almalinux-10.2.z]     (JIRA:AlmaLinux-193043)
      * ss core dumped when there is an SCTP session [almalinux-10.2.z] (JIRA:AlmaLinux-212393)
      * [AlmaLinux-10.2.z] Intel CWF: CPU is unable to obtain cstate1 on idle system (JIRA:AlmaLinux-218627)
      * AlmaLinux10.0 - s390/pfault: Fix virtual vs physical address confusion [almalinux-10.2.z]     (JIRA:AlmaLinux-222507)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-618870 advisory.

    - nvmet-auth: reject short AUTH_RECEIVE buffers (CKI Backport Bot) [RHEL-244915] {CVE-2026-72130}
    - locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() (CKI Backport Bot) [RHEL-242861]     {CVE-2026-72069}
    - NFSv4: include MAY_WRITE in open permission mask for O_TRUNC (CKI Backport Bot) [RHEL-234051]     {CVE-2026-64298}
    - nfsd: release layout stid on setlease failure (Scott Mayhew) [RHEL-227794] {CVE-2026-53399}
    - NFSv4/flexfiles: reject zero filehandle version count (CKI Backport Bot) [RHEL-229415] {CVE-2026-53392}
    - NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr (CKI Backport Bot) [RHEL-228036]     {CVE-2026-53391}
    - NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg (CKI Backport Bot) [RHEL-227946]     {CVE-2026-53026}
    - pNFS: Fix use-after-free in pnfs_update_layout() (CKI Backport Bot) [RHEL-226322] {CVE-2026-63800}
    - nfsd: fix posix_acl leak on SETACL decode failure (CKI Backport Bot) [RHEL-225522] {CVE-2026-53397}
    - mm/khugepaged: write all dirty file folios when collapsing (Rafael Aquini) [RHEL-236329]     {CVE-2026-68086}
    - userfaultfd: prevent registration of special VMAs (Rafael Aquini) [RHEL-237862] {CVE-2026-68166}
    - userfaultfd: correctly prevent registering VM_DROPPABLE regions (Rafael Aquini) [RHEL-237862]     {CVE-2026-68166}
    - crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() (Vladislav Dronov) [RHEL-234477]     {CVE-2026-64438}
    - mm: shrinker: fix NULL pointer dereference in debugfs (Rafael Aquini) [RHEL-230833] {CVE-2026-64417}
    - mm: shrinker: fix shrinker_info teardown race with expansion (Rafael Aquini) [RHEL-230833]     {CVE-2026-64418}
    - x86/bugs: Make Safe-RET robust against interrupt injection (Waiman Long) [RHEL-230475] {CVE-2026-68480}
    - crypto: qat - validate RSA CRT component lengths (CKI Backport Bot) [RHEL-234546] {CVE-2026-64304}
    - Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count (CKI Backport Bot) [RHEL-231446]     {CVE-2026-64277}
    - mm/huge_memory: update file PMD counter before folio_put() (CKI Backport Bot) [RHEL-231228]     {CVE-2026-53189}
    - Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count (CKI Backport Bot) [RHEL-230263]     {CVE-2026-64276}
    - ALSA: virtio: Validate control metadata from the device (CKI Backport Bot) [RHEL-230142]     {CVE-2026-64490}
    - net: mana: validate rx_req_idx to prevent out-of-bounds array access (CKI Backport Bot) [RHEL-229231]     {CVE-2026-64018}
    - smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() (CKI Backport Bot)     [RHEL-228550] {CVE-2026-64136}
    - bonding: alb: fix UAF in rlb_arp_recv during bond up/down (CKI Backport Bot) [RHEL-225292]     {CVE-2026-45970}
    - netfilter: ipset: fix race between dump and ip_set_list resize (CKI Backport Bot) [RHEL-227657]     {CVE-2026-64189}
    - iommu/amd: Fix clone_alias() to use the original device's devid (CKI Backport Bot) [RHEL-227452]     {CVE-2026-53053}
    - smb: client: fix change notify replay double-free (CKI Backport Bot) [RHEL-226988] {CVE-2026-64384}
    - mm/list_lru: drain before clearing xarray entry on reparent (Rafael Aquini) [RHEL-227399]     {CVE-2026-53153}
    - nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page (CKI Backport Bot) [RHEL-219623]     {CVE-2026-64320}
    - seccomp: passthrough uretprobe systemcall without filtering (Ricardo Robaina) [RHEL-210908]     {CVE-2025-21834}
    - zram: fix use-after-free in zram_bvec_write_partial() (CKI Backport Bot) [RHEL-191442] {CVE-2026-53185}
    - USB: serial: io_ti: fix heap overflow in build_i2c_fw_hdr() (Desnes Nunes) [RHEL-191042]     {CVE-2026-53195}
    - USB: serial: io_ti: fix heap overflow in get_manuf_info() (Desnes Nunes) [RHEL-191042] {CVE-2026-53196}
    - ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv() (CKI Backport Bot) [RHEL-189631]     {CVE-2026-23003}
    - ip6_gre: Use cached t->net in ip6erspan_changelink(). (CKI Backport Bot) [RHEL-180136] {CVE-2026-46120}
    - netfilter: nf_tables: Fix for duplicate device in netdev hooks (CKI Backport Bot) [RHEL-179761]     {CVE-2026-43454}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:61887 advisory.

    * kernel: seccomp: passthrough uretprobe systemcall without filtering (CVE-2025-21834)

    * kernel: ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv() (CVE-2026-23003)

    * kernel: netfilter: nf_tables: Fix for duplicate device in netdev hooks (CVE-2026-43454)

    * kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)

    * kernel: bonding: alb: fix UAF in rlb_arp_recv during bond up/down (CVE-2026-45970)

    * kernel: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120)

    * kernel: iommu/amd: Fix clone_alias() to use the original device's devid (CVE-2026-53053)

    * kernel: NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg (CVE-2026-53026)

    * kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)

    * kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)

    * kernel: mm/huge_memory: update file PMD counter before folio_put() (CVE-2026-53189)

    * kernel: mm/list_lru: drain before clearing xarray entry on reparent (CVE-2026-53153)

    * kernel: pNFS: Fix use-after-free in pnfs_update_layout() (CVE-2026-63800)

    * kernel: nfsd: fix posix_acl leak on SETACL decode failure (CVE-2026-53397)

    * kernel: nfsd: release layout stid on setlease failure (CVE-2026-53399)

    * kernel: NFSv4/flexfiles: reject zero filehandle version count (CVE-2026-53392)

    * kernel: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr (CVE-2026-53391)

    * kernel: net: mana: validate rx_req_idx to prevent out-of-bounds array access (CVE-2026-64018)

    * kernel: smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() (CVE-2026-64136)

    * kernel: netfilter: ipset: fix race between dump and ip_set_list resize (CVE-2026-64189)

    * kernel: nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page (CVE-2026-64320)

    * kernel: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() (CVE-2026-64438)

    * kernel: crypto: qat - validate RSA CRT component lengths (CVE-2026-64304)

    * kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC (CVE-2026-64298)

    * kernel: ALSA: virtio: Validate control metadata from the device (CVE-2026-64490)

    * kernel: mm: shrinker: fix shrinker_info teardown race with expansion (CVE-2026-64418)

    * kernel: smb: client: fix change notify replay double-free (CVE-2026-64384)

    * kernel: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count (CVE-2026-64277)

    * kernel: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count (CVE-2026-64276)

    * kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480)

    * kernel: mm/khugepaged: write all dirty file folios when collapsing (CVE-2026-68086)

    * kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation     (CVE-2026-68166)

    * kernel: locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() (CVE-2026-72069)

    * kernel: nvmet-auth: reject short AUTH_RECEIVE buffers (CVE-2026-72130)

    Bug Fix(es) and Enhancement(s):

    * Rocky Linux 10: s390: Revert support for DCACHE_WORD_ACCESS [rhel-10.2.z] (JIRA:Rocky Linux-188180)

    * qede: build_skb failure causes off-by-one BD ring corruption and kernel panic [rhel-10.2.z] (JIRA:Rocky     Linux-193043)

    * ss core dumped when there is an SCTP session [rhel-10.2.z] (JIRA:Rocky Linux-212393)

    * [Rocky Linux-10.2.z] Intel CWF: CPU is unable to obtain cstate1 on idle system (JIRA:Rocky Linux-218627)

    * Rocky Linux10.0 - s390/pfault: Fix virtual vs physical address confusion [rhel-10.2.z] (JIRA:Rocky     Linux-222507)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:61887 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: seccomp: passthrough uretprobe systemcall without filtering (CVE-2025-21834)

    * kernel: ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv() (CVE-2026-23003)

    * kernel: netfilter: nf_tables: Fix for duplicate device in netdev hooks (CVE-2026-43454)

    * kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)

    * kernel: bonding: alb: fix UAF in rlb_arp_recv during bond up/down (CVE-2026-45970)

    * kernel: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120)

    * kernel: iommu/amd: Fix clone_alias() to use the original device's devid (CVE-2026-53053)

    * kernel: NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg (CVE-2026-53026)

    * kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)

    * kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)

    * kernel: mm/huge_memory: update file PMD counter before folio_put() (CVE-2026-53189)

    * kernel: mm/list_lru: drain before clearing xarray entry on reparent (CVE-2026-53153)

    * kernel: pNFS: Fix use-after-free in pnfs_update_layout() (CVE-2026-63800)

    * kernel: nfsd: fix posix_acl leak on SETACL decode failure (CVE-2026-53397)

    * kernel: nfsd: release layout stid on setlease failure (CVE-2026-53399)

    * kernel: NFSv4/flexfiles: reject zero filehandle version count (CVE-2026-53392)

    * kernel: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr (CVE-2026-53391)

    * kernel: net: mana: validate rx_req_idx to prevent out-of-bounds array access (CVE-2026-64018)

    * kernel: smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() (CVE-2026-64136)

    * kernel: netfilter: ipset: fix race between dump and ip_set_list resize (CVE-2026-64189)

    * kernel: nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page (CVE-2026-64320)

    * kernel: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() (CVE-2026-64438)

    * kernel: crypto: qat - validate RSA CRT component lengths (CVE-2026-64304)

    * kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC (CVE-2026-64298)

    * kernel: ALSA: virtio: Validate control metadata from the device (CVE-2026-64490)

    * kernel: mm: shrinker: fix shrinker_info teardown race with expansion (CVE-2026-64418)

    * kernel: smb: client: fix change notify replay double-free (CVE-2026-64384)

    * kernel: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count (CVE-2026-64277)

    * kernel: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count (CVE-2026-64276)

    * kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480)

    * kernel: mm/khugepaged: write all dirty file folios when collapsing (CVE-2026-68086)

    * kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation     (CVE-2026-68166)

    * kernel: locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() (CVE-2026-72069)

    * kernel: nvmet-auth: reject short AUTH_RECEIVE buffers (CVE-2026-72130)

    Bug Fix(es) and Enhancement(s):

    * RHEL 10: s390: Revert support for DCACHE_WORD_ACCESS [rhel-10.2.z] (JIRA:RHEL-188180)

    * qede: build_skb failure causes off-by-one BD ring corruption and kernel panic [rhel-10.2.z]     (JIRA:RHEL-193043)

    * ss core dumped when there is an SCTP session [rhel-10.2.z] (JIRA:RHEL-212393)

    * [RHEL-10.2.z] Intel CWF: CPU is unable to obtain cstate1 on idle system (JIRA:RHEL-218627)

    * RHEL10.0 - s390/pfault: Fix virtual vs physical address confusion [rhel-10.2.z] (JIRA:RHEL-222507)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg In nfsd4_add_rdaccess_to_wrdeleg,     if fp->fi_fds[O_RDONLY] is already set by another thread, __nfs4_file_get_access should not be called to     increment the nfs4_file access count since that was already done by the thread that added READ access to     the file. The extra fi_access count in nfs4_file can prevent the corresponding nfsd_file from being freed.
    When stopping nfs-server service, these extra access counts trigger a BUG in kmem_cache_destroy() that     shows nfsd_file object remaining on __kmem_cache_shutdown. This problem can be reproduced by running the     Git project's test suite over NFS. (CVE-2026-53026)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
343532	Ubuntu 24.04 LTS / Pro Realtime 24.04 LTS : Linux kernel (GCP) vulnerabilities (USN-8728-1)	Nessus	Ubuntu Local Security Checks	Local	high
343087	AlmaLinux 10 : kernel (ALSA-2026:61887)	Nessus	Alma Linux Local Security Checks	Local	high
342711	Oracle Linux 10 : ELSA-2026-61887-0: / kernel (ELSA-2026-618870)	Nessus	Oracle Linux Local Security Checks	Local	high
342520	RockyLinux 10 : kernel (RLSA-2026:61887)	Nessus	Rocky Linux Local Security Checks	Local	high
342234	RHEL 10 : kernel (RHSA-2026:61887)	Nessus	Red Hat Local Security Checks	Local	high
340681	Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS : Linux kernel (NVIDIA) vulnerabilities (USN-8663-1)	Nessus	Ubuntu Local Security Checks	Local	high
340045	Ubuntu 26.04 LTS : Linux kernel (NVIDIA BaseOS) vulnerabilities (USN-8664-1)	Nessus	Ubuntu Local Security Checks	Local	high
323356	Linux Distros Unpatched Vulnerability : CVE-2026-53026	Nessus	Misc.	Local	high
322020	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1866)	Nessus	Amazon Linux Local Security Checks	Local	high

Detections

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CVE-2026-53026

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Tenable Plugins

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