In the Linux kernel, the following vulnerability has been resolved: net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume() Syzbot reported a bug as following: ===================================================== BUG: KMSAN: uninit-value in qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230 qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230 qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519 qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108 call_write_iter include/linux/fs.h:2189 [inline] aio_write+0x63a/0x950 fs/aio.c:1600 io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019 __do_sys_io_submit fs/aio.c:2078 [inline] __se_sys_io_submit+0x293/0x770 fs/aio.c:2048 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was created at: slab_post_alloc_hook mm/slab.h:766 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988 kmalloc_reserve net/core/skbuff.c:492 [inline] __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565 __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630 qrtr_endpoint_post+0xbd/0x11b0 net/qrtr/af_qrtr.c:446 qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108 call_write_iter include/linux/fs.h:2189 [inline] aio_write+0x63a/0x950 fs/aio.c:1600 io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019 __do_sys_io_submit fs/aio.c:2078 [inline] __se_sys_io_submit+0x293/0x770 fs/aio.c:2048 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd It is because that skb->len requires at least sizeof(struct qrtr_ctrl_pkt) in qrtr_tx_resume(). And skb->len equals to size in qrtr_endpoint_post(). But size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb->type equals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot scenario. This triggers the uninit variable access bug. Add size check when qrtr_cb->type equals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() to fix the bug.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-099728 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()

    Syzbot reported a bug as following:

    =====================================================     BUG: KMSAN: uninit-value in qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230      qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230      qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519      qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108      call_write_iter include/linux/fs.h:2189 [inline]      aio_write+0x63a/0x950 fs/aio.c:1600      io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019
     __do_sys_io_submit fs/aio.c:2078 [inline]
     __se_sys_io_submit+0x293/0x770 fs/aio.c:2048
     __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048      do_syscall_x64 arch/x86/entry/common.c:50 [inline]      do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80      entry_SYSCALL_64_after_hwframe+0x63/0xcd

    Uninit was created at:
     slab_post_alloc_hook mm/slab.h:766 [inline]      slab_alloc_node mm/slub.c:3452 [inline]
     __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491
     __do_kmalloc_node mm/slab_common.c:967 [inline]
     __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988      kmalloc_reserve net/core/skbuff.c:492 [inline]
     __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565
     __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630      qrtr_endpoint_post+0xbd/0x11b0 net/qrtr/af_qrtr.c:446      qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108      call_write_iter include/linux/fs.h:2189 [inline]      aio_write+0x63a/0x950 fs/aio.c:1600      io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019
     __do_sys_io_submit fs/aio.c:2078 [inline]
     __se_sys_io_submit+0x293/0x770 fs/aio.c:2048
     __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048      do_syscall_x64 arch/x86/entry/common.c:50 [inline]      do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80      entry_SYSCALL_64_after_hwframe+0x63/0xcd

    It is because that skb->len requires at least sizeof(struct qrtr_ctrl_pkt)     in qrtr_tx_resume(). And skb->len equals to size in qrtr_endpoint_post().
    But size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb->type     equals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot     scenario. This triggers the uninit variable access bug.

    Add size check when qrtr_cb->type equals to QRTR_TYPE_RESUME_TX in     qrtr_endpoint_post() to fix the bug.

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

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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-100386 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()

    Syzbot reported a bug as following:

    =====================================================     BUG: KMSAN: uninit-value in qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230      qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230      qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519      qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108      call_write_iter include/linux/fs.h:2189 [inline]      aio_write+0x63a/0x950 fs/aio.c:1600      io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019
     __do_sys_io_submit fs/aio.c:2078 [inline]
     __se_sys_io_submit+0x293/0x770 fs/aio.c:2048
     __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048      do_syscall_x64 arch/x86/entry/common.c:50 [inline]      do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80      entry_SYSCALL_64_after_hwframe+0x63/0xcd

    Uninit was created at:
     slab_post_alloc_hook mm/slab.h:766 [inline]      slab_alloc_node mm/slub.c:3452 [inline]
     __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491
     __do_kmalloc_node mm/slab_common.c:967 [inline]
     __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988      kmalloc_reserve net/core/skbuff.c:492 [inline]
     __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565
     __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630      qrtr_endpoint_post+0xbd/0x11b0 net/qrtr/af_qrtr.c:446      qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108      call_write_iter include/linux/fs.h:2189 [inline]      aio_write+0x63a/0x950 fs/aio.c:1600      io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019
     __do_sys_io_submit fs/aio.c:2078 [inline]
     __se_sys_io_submit+0x293/0x770 fs/aio.c:2048
     __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048      do_syscall_x64 arch/x86/entry/common.c:50 [inline]      do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80      entry_SYSCALL_64_after_hwframe+0x63/0xcd

    It is because that skb->len requires at least sizeof(struct qrtr_ctrl_pkt)     in qrtr_tx_resume(). And skb->len equals to size in qrtr_endpoint_post().
    But size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb->type     equals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot     scenario. This triggers the uninit variable access bug.

    Add size check when qrtr_cb->type equals to QRTR_TYPE_RESUME_TX in     qrtr_endpoint_post() to fix the bug.

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

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:4320-1 advisory.

    The SUSE Linux Enterprise 15 SP5 kernel was updated to fix various security issues

    The following security issues were fixed:

    - CVE-2022-50327: ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value (bsc#1249859).
    - CVE-2022-50334: hugetlbfs: fix null-ptr-deref in hugetlbfs_parse_param() (bsc#1249857).
    - CVE-2022-50490: bpf: Propagate error from htab_lock_bucket() to userspace (bsc#1251164).
    - CVE-2022-50516: fs: dlm: fix invalid derefence of sb_lvbptr (bsc#1251741).
    - CVE-2023-53365: ip6mr: Fix skb_under_panic in ip6mr_cache_report() (bsc#1249988).
    - CVE-2023-53500: xfrm: fix slab-use-after-free in decode_session6 (bsc#1250816).
    - CVE-2023-53559: ip_vti: fix potential slab-use-after-free in decode_session6 (bsc#1251052).
    - CVE-2023-53574: wifi: rtw88: delete timer and free skb queue when unloading (bsc#1251222).
    - CVE-2023-53619: netfilter: conntrack: Avoid nf_ct_helper_hash uses after free (bsc#1251743).
    - CVE-2023-53673: Bluetooth: hci_event: call disconnect callback before deleting conn (bsc#1251763).
    - CVE-2023-53705: ipv6: Fix out-of-bounds access in ipv6_find_tlv() (bsc#1252554).
    - CVE-2025-37885: KVM: x86: Reset IRTE to host control if *new* route isn't postable (bsc#1242960).
    - CVE-2025-38084: hugetlb: unshare some PMDs when splitting VMAs (bsc#1245498).
    - CVE-2025-38085: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race (bsc#1245499).
    - CVE-2025-38476: rpl: Fix use-after-free in rpl_do_srh_inline() (bsc#1247317).
    - CVE-2025-39742: RDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask() (bsc#1249479).
    - CVE-2025-39797: xfrm: Duplicate SPI Handling (bsc#1249608).
    - CVE-2025-39945: cnic: Fix use-after-free bugs in cnic_delete_task (bsc#1251230).
    - CVE-2025-39967: fbcon: fix integer overflow in fbcon_do_set_font (bsc#1252033).
    - CVE-2025-39968: i40e: add max boundary check for VF filters (bsc#1252047).
    - CVE-2025-39973: i40e: add validation for ring_len param (bsc#1252035).
    - CVE-2025-39978: octeontx2-pf: Fix potential use after free in otx2_tc_add_flow() (bsc#1252069).
    - CVE-2025-39981: Bluetooth: MGMT: Fix possible UAFs (bsc#1252060).
    - CVE-2025-40018: ipvs: Defer ip_vs_ftp unregister during netns cleanup (bsc#1252688).
    - CVE-2025-40044: fs: udf: fix OOB read in lengthAllocDescs handling (bsc#1252785).

    The following non security issues were fixed:

    - NFS: remove revoked delegation from server's delegation list (bsc#1246211).
    - NFSv4: Allow FREE_STATEID to clean up delegations (bsc#1246211).
    - fbcon: Fix OOB access in font allocation (bsc#1252033)
    - kabi fix for NFSv4: Allow FREE_STATEID to clean up delegations (bsc#1246211).
    - kernel-subpackage-spec: Do not doubly-sign modules (bsc#1251930).
    - mm: avoid unnecessary page fault retires on shared memory types (bsc#1251823).
    - net: hv_netvsc: fix loss of early receive events from host during channel open (bsc#1252265).
    - net: mana: Switch to page pool for jumbo frames (bsc#1248754).
    - net: mana: Use page pool fragments for RX buffers instead of full pages to improve memory efficiency     (bsc#1248754).
    - netfilter: nft_objref: validate objref and objrefmap expressions (bsc#1250237).
    - rpm/check-for-config-changes: ignore CONFIG_SCHED_PROXY_EXEC, too (bsc#1250946)

Tenable has extracted the preceding description block directly from the SUSE 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.

  - In the Linux kernel, the following vulnerability has been resolved: net: qrtr: Fix an uninit variable     access bug in qrtr_tx_resume() Syzbot reported a bug as following:
    ===================================================== BUG: KMSAN: uninit-value in     qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230 qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230     qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519 qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108     call_write_iter include/linux/fs.h:2189 [inline] aio_write+0x63a/0x950 fs/aio.c:1600     io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019 __do_sys_io_submit fs/aio.c:2078 [inline]
    __se_sys_io_submit+0x293/0x770 fs/aio.c:2048 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048 do_syscall_x64     arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80     entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was created at: slab_post_alloc_hook mm/slab.h:766     [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491
    __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node_track_caller+0x114/0x3b0     mm/slab_common.c:988 kmalloc_reserve net/core/skbuff.c:492 [inline] __alloc_skb+0x3af/0x8f0     net/core/skbuff.c:565 __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630 qrtr_endpoint_post+0xbd/0x11b0     net/qrtr/af_qrtr.c:446 qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108 call_write_iter     include/linux/fs.h:2189 [inline] aio_write+0x63a/0x950 fs/aio.c:1600 io_submit_one+0x1d1c/0x3bf0     fs/aio.c:2019 __do_sys_io_submit fs/aio.c:2078 [inline] __se_sys_io_submit+0x293/0x770 fs/aio.c:2048
    __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline]     do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd It is because     that skb->len requires at least sizeof(struct qrtr_ctrl_pkt) in qrtr_tx_resume(). And skb->len equals to     size in qrtr_endpoint_post(). But size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb->type equals     to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot scenario. This triggers the uninit     variable access bug. Add size check when qrtr_cb->type equals to QRTR_TYPE_RESUME_TX in     qrtr_endpoint_post() to fix the bug. (CVE-2023-53578)

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

An update of the linux package has been released.

ID	Name	Product	Family	Type	Severity
337045	Unity Linux 20.1050e Security Update: kernel (UTSA-2026-099728)	Nessus	Unity Linux Local Security Checks	Local	high
336765	Unity Linux 20.1050a Security Update: kernel (UTSA-2026-100386)	Nessus	Unity Linux Local Security Checks	Local	high
280691	SUSE SLES15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2025:4320-1)	Nessus	SuSE Local Security Checks	Local	high
269336	Linux Distros Unpatched Vulnerability : CVE-2023-53578	Nessus	Misc.	Local	high
151965	Photon OS 4.0: Linux PHSA-2021-4.0-0065	Nessus	PhotonOS Local Security Checks	Local	high

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CVE-2023-53578

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