In the Linux kernel, the following vulnerability has been resolved: io_uring/rsrc: reject zero-length fixed buffer import validate_fixed_range() admits buf_addr at the exact end of the registered region when len is zero, because the check uses strict greater-than (buf_end > imu->ubuf + imu->len). io_import_fixed() then computes offset == imu->len, which causes the bvec skip logic to advance past the last bio_vec entry and read bv_offset from out-of-bounds slab memory. Return early from io_import_fixed() when len is zero. A zero-length import has no data to transfer and should not walk the bvec array at all. BUG: KASAN: slab-out-of-bounds in io_import_reg_buf+0x697/0x7f0 Read of size 4 at addr ffff888002bcc254 by task poc/103 Call Trace: io_import_reg_buf+0x697/0x7f0 io_write_fixed+0xd9/0x250 __io_issue_sqe+0xad/0x710 io_issue_sqe+0x7d/0x1100 io_submit_sqes+0x86a/0x23c0 __do_sys_io_uring_enter+0xa98/0x1590 Allocated by task 103: The buggy address is located 12 bytes to the right of allocated 584-byte region [ffff888002bcc000, ffff888002bcc248)

The Rocky Linux 10.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_21557 advisory.

    * kernel: can: j1939: j1939_session_new(): fix skb reference counting (CVE-2024-56645)

    * kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)

    * kernel: mm: thp: deny THP for files on anonymous inodes (CVE-2026-23375)

    * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)

    * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)

    * kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)

    * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)

    * kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)

    * kernel: io_uring/rsrc: reject zero-length fixed buffer import (CVE-2026-43006)

    * kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)

    * kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)

    * kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)

    * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

    * kernel: Linux kernel dpaa2-switch: Kernel memory corruption via out-of-bounds write (CVE-2026-43205)

    * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

    * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)

Tenable has extracted the preceding description block directly from the CIQ 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 Rocky Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_21557 advisory.

    * kernel: can: j1939: j1939_session_new(): fix skb reference counting (CVE-2024-56645)

    * kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)

    * kernel: mm: thp: deny THP for files on anonymous inodes (CVE-2026-23375)

    * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)

    * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)

    * kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)

    * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)

    * kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)

    * kernel: io_uring/rsrc: reject zero-length fixed buffer import (CVE-2026-43006)

    * kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)

    * kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)

    * kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)

    * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

    * kernel: Linux kernel dpaa2-switch: Kernel memory corruption via out-of-bounds write (CVE-2026-43205)

    * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

    * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)

Tenable has extracted the preceding description block directly from the CIQ 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-2026-21557 advisory.

    - crypto: ccp - copy IV using skcipher ivsize (CKI Backport Bot) [RHEL-188463] {CVE-2026-53016}
    - futex/requeue: Revert 'Prevent NULL pointer dereference in remove_waiter() on self-deadlock'' (CKI     Backport Bot) [RHEL-193250] {CVE-2026-53166}
    - futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock (CKI Backport Bot)     [RHEL-193250] {CVE-2026-43499}
    - locking/rtmutex: Skip remove_waiter() when waiter is not enqueued (CKI Backport Bot) [RHEL-193153]     {CVE-2026-43499}
    - rtmutex: Use waiter::task instead of current in remove_waiter() (CKI Backport Bot) [RHEL-193153]     {CVE-2026-43499}
    - md/bitmap: fix GPF in write_page caused by resize race (Nigel Croxon) [RHEL-174092] {CVE-2026-43163}
    - KVM: x86: Fix shadow paging use-after-free due to unexpected role (Paolo Bonzini) [RHEL-192407]     {CVE-2026-53359}
    - KVM: x86: Fix shadow paging use-after-free due to unexpected GFN (CKI Backport Bot) [RHEL-186698]     {CVE-2026-46113}
    - net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change (CKI Backport     Bot) [RHEL-183007] {CVE-2025-71066}
    - sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CKI Backport Bot)     [RHEL-179854] {CVE-2026-46227}
    - eventpoll: Fix semi-unbounded recursion (Ian Kent) [RHEL-180776] {CVE-2025-38614}
    - eventpoll: fix ep_remove struct eventpoll / struct file UAF (Ian Kent) [RHEL-180776] {CVE-2026-46242}
    - eventpoll: defer struct eventpoll free to RCU grace period (Ian Kent) [RHEL-173832] {CVE-2026-43074}
    - smb/client: fix out-of-bounds read in smb2_compound_op() (Paulo Alcantara) [RHEL-180048]     {CVE-2026-46155}
    - procfs: fix missing RCU protection when reading real_parent in do_task_stat() (CKI Backport Bot)     [RHEL-181902] {CVE-2026-46259}
    - net/ipv6: ioam6: prevent schema length wraparound in trace fill (Antoine Tenart) [RHEL-174786]     {CVE-2026-43341}
    - net/mana: Null service_wq on setup error to prevent double destroy (CKI Backport Bot) [RHEL-180277]     {CVE-2026-43276}
    - net: mana: Fix double destroy_workqueue on service rescan PCI path (CKI Backport Bot) [RHEL-180277]     {CVE-2026-43276}
    - fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath (CKI Backport Bot) [RHEL-189491]     {CVE-2026-43112}
    - Enable workaround for ARM64 ERRATUM 4118414 (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: errata: Mitigate TLBI errata on Microsoft Azure Cobalt 100 CPU (Mark Salter) [RHEL-183592]     {CVE-2025-10263}
    - arm64: errata: Mitigate TLBI errata on NVIDIA Olympus CPU (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: errata: Mitigate TLBI errata on various Arm CPUs (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: cputype: Add C1-Ultra definitions (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: cputype: Add C1-Premium definitions (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: cputype: Add C1-Pro definitions (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry (CKI Backport Bot)     [RHEL-183965] {CVE-2026-46316}
    - netfilter: nft_inner: Fix IPv6 inner_thoff desync (CKI Backport Bot) [RHEL-181936] {CVE-2026-46244}
    - drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() (CKI Backport Bot)     [RHEL-179912] {CVE-2026-46209}
    - rxrpc: Fix rxrpc_input_call_event() to only unshare DATA packets (CKI Backport Bot) [RHEL-179566]     {CVE-2026-45998}
    - rxrpc: Fix potential UAF after skb_unshare() failure (CKI Backport Bot) [RHEL-179566] {CVE-2026-45998}
    - RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init() (CKI Backport Bot) [RHEL-180001]     {CVE-2026-46176}
    - crypto: tegra - Add missing CRYPTO_ALG_ASYNC (Vladislav Dronov) [RHEL-182759] {CVE-2026-31739}
    - RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path (CKI Backport Bot) [RHEL-179965]     {CVE-2026-46189}
    - ALSA: aloop: Fix peer runtime UAF during format-change stop (CKI Backport Bot) [RHEL-179317]     {CVE-2026-46090}
    - ALSA: usb-audio: Add sanity check for OOB writes at silencing (CKI Backport Bot) [RHEL-173937]     {CVE-2026-43279}
    - tcp: fix potential race in tcp_v6_syn_recv_sock() (Paolo Abeni) [RHEL-174242] {CVE-2026-43198}
    - scsi: qla2xxx: Completely fix fcport double free (Ewan D. Milne) [RHEL-179755] {CVE-2026-43414}
    - RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CKI Backport Bot) [RHEL-180155]     {CVE-2026-46117}
    - RDMA/iwcm: Fix workqueue list corruption by removing work_list (CKI Backport Bot) [RHEL-179665]     {CVE-2026-45898}
    - rxrpc: fix RESPONSE authenticator parser OOB read (CKI Backport Bot) [RHEL-171456] {CVE-2026-31636}
    - nvmet-tcp: fix race between ICReq handling and queue teardown (CKI Backport Bot) [RHEL-180106]     {CVE-2026-46135}
    - RDMA/mana: Validate rx_hash_key_len (CKI Backport Bot) [RHEL-180090] {CVE-2026-46145}
    - ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (Guillaume Nault) [RHEL-172675]     {CVE-2026-43038}
    - net/sched: fix pedit partial COW leading to page cache corruption (Ivan Vecera) [RHEL-177380]     {CVE-2026-46331}
    - exit: prevent preemption of oopsing TASK_DEAD task (CKI Backport Bot) [RHEL-180009] {CVE-2026-46173}
    - crypto: caam - fix overflow on long hmac keys (CKI Backport Bot) [RHEL-179769] {CVE-2026-43330}

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-2026:21557 advisory.

    * kernel: can: j1939: j1939_session_new(): fix skb reference counting (CVE-2024-56645)

    * kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)

    * kernel: mm: thp: deny THP for files on anonymous inodes (CVE-2026-23375)

    * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)

    * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)

    * kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)

    * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)

    * kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)

    * kernel: io_uring/rsrc: reject zero-length fixed buffer import (CVE-2026-43006)

    * kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)

    * kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)

    * kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)

    * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

    * kernel: Linux kernel dpaa2-switch: Kernel memory corruption via out-of-bounds write (CVE-2026-43205)

    * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

    * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)

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-2026:21557 advisory.

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

    Security Fix(es):

    * kernel: can: j1939: j1939_session_new(): fix skb reference counting (CVE-2024-56645)

    * kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)

    * kernel: mm: thp: deny THP for files on anonymous inodes (CVE-2026-23375)

    * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)

    * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)

    * kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)

    * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)

    * kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)

    * kernel: io_uring/rsrc: reject zero-length fixed buffer import (CVE-2026-43006)

    * kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)

    * kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)

    * kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)

    * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

    * kernel: Linux kernel dpaa2-switch: Kernel memory corruption via out-of-bounds write (CVE-2026-43205)

    * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

    * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)

    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.

  - io_uring/rsrc: reject zero-length fixed buffer import validate_fixed_range() admits buf_addr at the exact     end of the registered region when len is zero, because the check uses strict greater-than (buf_end >     imu->ubuf + imu->len). io_import_fixed() then computes offset == imu->len, which causes the bvec skip     logic to advance past the last bio_vec entry and read bv_offset from out-of-bounds slab memory. Return     early from io_import_fixed() when len is zero. A zero-length import has no data to transfer and should not     walk the bvec array at all. BUG: KASAN: slab-out-of-bounds in io_import_reg_buf+0x697/0x7f0 Read of size 4     at addr ffff888002bcc254 by task poc/103 Call Trace: io_import_reg_buf+0x697/0x7f0     io_write_fixed+0xd9/0x250 __io_issue_sqe+0xad/0x710 io_issue_sqe+0x7d/0x1100 io_submit_sqes+0x86a/0x23c0
    __do_sys_io_uring_enter+0xa98/0x1590 Allocated by task 103: The buggy address is located 12 bytes to the     right of allocated 584-byte region [ffff888002bcc000, ffff888002bcc248) (CVE-2026-43006)

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

ID	Name	Product	Family	Type	Severity
363403	Rocky Linux 10.2 [CIQ] Security Update: kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc Multiple Vulnerabilities (crlsa-2026_21557)	Nessus	Rocky Linux Local Security Checks	Local	high
355813	Rocky Linux 10 [CIQ] Security Update: kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc Multiple Vulnerabilities (crlsa-2026_21557)	Nessus	Rocky Linux Local Security Checks	Local	high
330463	Oracle Linux 10 : kernel (ELSA-2026-21557)	Nessus	Oracle Linux Local Security Checks	Local	high
318641	RockyLinux 10 : kernel (RLSA-2026:21557)	Nessus	Rocky Linux Local Security Checks	Local	high
317380	RHEL 10 : kernel (RHSA-2026:21557)	Nessus	Red Hat Local Security Checks	Local	high
316948	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1746)	Nessus	Amazon Linux Local Security Checks	Local	high
311560	Linux Distros Unpatched Vulnerability : CVE-2026-43006	Nessus	Misc.	Local	high

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