In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix use-after-free in lbs_free_adapter() The lbs_free_adapter() function uses timer_delete() (non-synchronous) for both command_timer and tx_lockup_timer before the structure is freed. This is incorrect because timer_delete() does not wait for any running timer callback to complete. If a timer callback is executing when lbs_free_adapter() is called, the callback will access freed memory since lbs_cfg_free() frees the containing structure immediately after lbs_free_adapter() returns. Both timer callbacks (lbs_cmd_timeout_handler and lbs_tx_lockup_handler) access priv->driver_lock, priv->cur_cmd, priv->dev, and other fields, which would all be use-after-free violations. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning. This bug was introduced in commit 8f641d93c38a ("libertas: detect TX lockups and reset hardware") where del_timer() was used instead of del_timer_sync() in the cleanup path. The command_timer has had the same issue since the driver was first written.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20572-1 advisory.

    The SUSE Linux Enterprise 16.0 kernel was updated to fix various security issues

    The following security issues were fixed:

    - CVE-2025-39998: scsi: target: target_core_configfs: Add length check to avoid buffer overflow     (bsc#1252073).
    - CVE-2025-40253: s390/ctcm: Fix double-kfree (bsc#1255084).
    - CVE-2025-68794: iomap: adjust read range correctly for non-block-aligned positions (bsc#1256647).
    - CVE-2025-71239: audit: add fchmodat2() to change attributes class (bsc#1259759).
    - CVE-2026-23072: l2tp: Fix memleak in l2tp_udp_encap_recv() (bsc#1257708).
    - CVE-2026-23103: ipvlan: Make the addrs_lock be per port (bsc#1257773).
    - CVE-2026-23120: l2tp: avoid one data-race in l2tp_tunnel_del_work() (bsc#1258280).
    - CVE-2026-23125: sctp: move SCTP_CMD_ASSOC_SHKEY right after SCTP_CMD_PEER_INIT (bsc#1258293).
    - CVE-2026-23138: kABI: Preserve values of the trace recursion bits (bsc#1258301).
    - CVE-2026-23140: bpf, test_run: Subtract size of xdp_frame from allowed metadata size (bsc#1258305).
    - CVE-2026-23187: pmdomain: imx8m-blk-ctrl: fix out-of-range access of bc->domains (bsc#1258330).
    - CVE-2026-23193: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()     (bsc#1258414).
    - CVE-2026-23201: ceph: fix oops due to invalid pointer for kfree() in parse_longname() (bsc#1258337).
    - CVE-2026-23204: net: add skb_header_pointer_careful() helper (bsc#1258340).
    - CVE-2026-23215: x86/vmware: Fix hypercall clobbers (bsc#1258476).
    - CVE-2026-23216: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (bsc#1258447).
    - CVE-2026-23231: netfilter: nf_tables: fix use-after-free in nf_tables_addchain() (bsc#1259188).
    - CVE-2026-23239: espintcp: Fix race condition in espintcp_close() (bsc#1259485).
    - CVE-2026-23240: tls: Fix race condition in tls_sw_cancel_work_tx() (bsc#1259484).
    - CVE-2026-23242: RDMA/siw: Fix potential NULL pointer dereference in header processing (bsc#1259795).
    - CVE-2026-23243: RDMA/umad: Reject negative data_len in ib_umad_write (bsc#1259797).
    - CVE-2026-23255: net: add proper RCU protection to /proc/net/ptype (bsc#1259891).
    - CVE-2026-23262: gve: Fix stats report corruption on queue count change (bsc#1259870).
    - CVE-2026-23270: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks     (bsc#1259886).
    - CVE-2026-23272: netfilter: nf_tables: unconditionally bump set->nelems before insertion (bsc#1260009).
    - CVE-2026-23274: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels (bsc#1260005).
    - CVE-2026-23277: net/sched: teql: fix NULL pointer dereference in iptunnel_xmit on TEQL slave xmit     (bsc#1259997).
    - CVE-2026-23278: netfilter: nf_tables: always walk all pending catchall elements (bsc#1259998).
    - CVE-2026-23281: wifi: libertas: fix use-after-free in lbs_free_adapter() (bsc#1260464).
    - CVE-2026-23292: scsi: target: Fix recursive locking in __configfs_open_file() (bsc#1260500).
    - CVE-2026-23293: net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled (bsc#1260486).
    - CVE-2026-23297: nfsd: Fix cred ref leak in nfsd_nl_threads_set_doit() (bsc#1260490).
    - CVE-2026-23304: ipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu() (bsc#1260544).
    - CVE-2026-23319: bpf: Fix a UAF issue in bpf_trampoline_link_cgroup_shim (bsc#1260735).
    - CVE-2026-23326: xsk: Fix fragment node deletion to prevent buffer leak (bsc#1260606).
    - CVE-2026-23335: RDMA/irdma: Fix kernel stack leak in irdma_create_user_ah() (bsc#1260550).
    - CVE-2026-23343: xdp: produce a warning when calculated tailroom is negative (bsc#1260527).
    - CVE-2026-23361: PCI: dwc: ep: Flush MSI-X write before unmapping its ATU entry (bsc#1260732).
    - CVE-2026-23379: net/sched: ets: fix divide by zero in the offload path (bsc#1260481).
    - CVE-2026-23381: net: bridge: fix nd_tbl NULL dereference when IPv6 is disabled (bsc#1260471).
    - CVE-2026-23383: bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing     (bsc#1260497).
    - CVE-2026-23386: gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL (bsc#1260799).
    - CVE-2026-23393: bridge: cfm: Fix race condition in peer_mep deletion (bsc#1260522).
    - CVE-2026-23398: icmp: fix NULL pointer dereference in icmp_tag_validation() (bsc#1260730).
    - CVE-2026-23413: clsact: Fix use-after-free in init/destroy rollback asymmetry (bsc#1261498).
    - CVE-2026-23414: tls: Purge async_hold in tls_decrypt_async_wait() (bsc#1261496).
    - CVE-2026-23419: net/rds: Fix circular locking dependency in rds_tcp_tune (bsc#1261507).
    - CVE-2026-23425: KVM: arm64: Fix ID register initialization for non-protected pKVM guests (bsc#1261506).
    - CVE-2026-31788: xen/privcmd: restrict usage in unprivileged domU (bsc#1259707).

    The following non security issues were fixed:

    - KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE (bsc#1259461).
    - KVM: x86: synthesize CPUID bits only if CPU capability is set (bsc#1257511).
    - Revert drm/i915/display: Add quirk to skip retraining of dp link (bsc#1253129).
    - Update config files (bsc#1254307).
    - apparmor: Fix double free of ns_name in aa_replace_profiles() (bsc#1258849).
    - apparmor: fix differential encoding verification (bsc#1258849).
    - apparmor: fix memory leak in verify_header (bsc#1258849).
    - apparmor: fix missing bounds check on DEFAULT table in verify_dfa() (bsc#1258849).
    - apparmor: fix race between freeing data and fs accessing it (bsc#1258849).
    - apparmor: fix race on rawdata dereference (bsc#1258849).
    - apparmor: fix side-effect bug in match_char() macro usage (bsc#1258849).
    - apparmor: fix unprivileged local user can do privileged policy management (bsc#1258849).
    - apparmor: fix: limit the number of levels of policy namespaces (bsc#1258849).
    - apparmor: replace recursive profile removal with iterative approach (bsc#1258849).
    - apparmor: validate DFA start states are in bounds in unpack_pdb (bsc#1258849).
    - bpf, btf: Enforce destructor kfunc type with CFI (bsc#1259955).
    - bpf: crypto: Use the correct destructor kfunc type (bsc#1259955).
    - btrfs: only enforce free space tree if v1 cache is required for bs < ps cases (bsc#1260459).
    - btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file() (bsc#1257777).
    - dmaengine: sh: rz-dmac: Move CHCTRL updates under spinlock (git-fixes).
    - drm/amdkfd: Unreserve bo if queue update failed (git-fixes).
    - drm/i915/display: Add module param to skip retraining of dp link (bsc#1253129).
    - drm/i915/dsc: Add Selective Update register definitions (stable-fixes).
    - drm/i915/dsc: Add helper for writing DSC Selective Update ET parameters (stable-fixes).
    - firmware: microchip: fail auto-update probe if no flash found (git-fixes).
    - kABI: Include trace recursion bits in kABI tracking (bsc#1258301).
    - net: mana: Trigger VF reset/recovery on health check failure due to HWC timeout (bsc#1259580).
    - nvme: add support for dynamic quirk configuration via module parameter (bsc#1243208).
    - nvme: expose active quirks in sysfs (bsc#1243208).
    - nvme: fix memory leak in quirks_param_set() (bsc#1243208).
    - powerpc/crash: adjust the elfcorehdr size (jsc#PED-11175 git-fixes).
    - powerpc/kdump: Fix size calculation for hot-removed memory ranges (jsc#PED-11175 git-fixes).
    - s390/cio: Update purge function to unregister the unused subchannels (bsc#1254214).
    - s390/ipl: Clear SBP flag when bootprog is set (bsc#1258175).
    - s390: Disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP (bsc#1254306).
    - scsi: fnic: Add Cisco hardware model names (jsc#PED-15441).
    - scsi: fnic: Add and integrate support for FDMI (jsc#PED-15441).
    - scsi: fnic: Add and integrate support for FIP (jsc#PED-15441).
    - scsi: fnic: Add functionality in fnic to support FDLS (jsc#PED-15441).
    - scsi: fnic: Add headers and definitions for FDLS (jsc#PED-15441).
    - scsi: fnic: Add stats and related functionality (jsc#PED-15441).
    - scsi: fnic: Add support for fabric based solicited requests and responses (jsc#PED-15441).
    - scsi: fnic: Add support for target based solicited requests and responses (jsc#PED-15441).
    - scsi: fnic: Add support for unsolicited requests and responses (jsc#PED-15441).
    - scsi: fnic: Add support to handle port channel RSCN (jsc#PED-15441).
    - scsi: fnic: Code cleanup (jsc#PED-15441).
    - scsi: fnic: Delete incorrect debugfs error handling (jsc#PED-15441).
    - scsi: fnic: Fix crash in fnic_wq_cmpl_handler when FDMI times out (jsc#PED-15441).
    - scsi: fnic: Fix indentation and remove unnecessary parenthesis (jsc#PED-15441).
    - scsi: fnic: Fix missing DMA mapping error in fnic_send_frame() (jsc#PED-15441).
    - scsi: fnic: Fix use of uninitialized value in debug message (jsc#PED-15441).
    - scsi: fnic: Increment driver version (jsc#PED-15441).
    - scsi: fnic: Modify IO path to use FDLS (jsc#PED-15441).
    - scsi: fnic: Modify fnic interfaces to use FDLS (jsc#PED-15441).
    - scsi: fnic: Propagate SCSI error code from fnic_scsi_drv_init() (jsc#PED-15441).
    - scsi: fnic: Remove always-true IS_FNIC_FCP_INITIATOR macro (jsc#PED-15441).
    - scsi: fnic: Remove extern definition from .c files (jsc#PED-15441).
    - scsi: fnic: Remove unnecessary debug print (jsc#PED-15441).
    - scsi: fnic: Remove unnecessary else and unnecessary break in FDLS (jsc#PED-15441).
    - scsi: fnic: Remove unnecessary else to fix warning in FDLS FIP (jsc#PED-15441).
    - scsi: fnic: Remove unnecessary spinlock locking and unlocking (jsc#PED-15441).
    - scsi: fnic: Replace fnic->lock_flags with local flags (jsc#PED-15441).
    - scsi: fnic: Replace shost_printk() with dev_info()/dev_err() (jsc#PED-15441).
    - scsi: fnic: Replace use of sizeof with standard usage (jsc#PED-15441).
    - scsi: fnic: Return appropriate error code for mem alloc failure (jsc#PED-15441).
    - scsi: fnic: Return appropriate error code from failure of scsi drv init (jsc#PED-15441).
    - scsi: fnic: Test for memory allocation failure and return error code (jsc#PED-15441).
    - scsi: fnic: Turn off FDMI ACTIVE flags on link down (jsc#PED-15441).
    - scsi: hisi_sas: Fix NULL pointer exception during user_scan() (bsc#1255687).
    - scsi: scsi_transport_sas: Fix the maximum channel scanning issue (bsc#1255687, git-fixes).
    - scsi: smartpqi: Fix memory leak in pqi_report_phys_luns() (git-fixes, jsc#PED-15042).
    - selftests/bpf: Use the correct destructor kfunc type (bsc#1259955).
    - selftests/powerpc: Suppress -Wmaybe-uninitialized with GCC 15 (bsc#1261669 ltc#212590).
    - tg3: Fix race for querying speed/duplex (bsc#1257183).
    - x86/platform/uv: Handle deconfigured sockets (bsc#1260347).

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.

An update of the linux package has been released.

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

  - wifi: libertas: fix use-after-free in lbs_free_adapter() The lbs_free_adapter() function uses     timer_delete() (non-synchronous) for both command_timer and tx_lockup_timer before the structure is freed.
    This is incorrect because timer_delete() does not wait for any running timer callback to complete. If a     timer callback is executing when lbs_free_adapter() is called, the callback will access freed memory since     lbs_cfg_free() frees the containing structure immediately after lbs_free_adapter() returns. Both timer     callbacks (lbs_cmd_timeout_handler and lbs_tx_lockup_handler) access priv->driver_lock, priv->cur_cmd,     priv->dev, and other fields, which would all be use-after-free violations. Use timer_delete_sync() instead     to ensure any running timer callback has completed before returning. This bug was introduced in commit     8f641d93c38a (libertas: detect TX lockups and reset hardware) where del_timer() was used instead of     del_timer_sync() in the cleanup path. The command_timer has had the same issue since the driver was first     written. (CVE-2026-23281)

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

ID	Name	Product	Family	Severity
309153	openSUSE 16 Security Update : kernel (openSUSE-SU-2026:20572-1)	Nessus	SuSE Local Security Checks	high
306005	Photon OS 5.0: Linux PHSA-2026-5.0-0813	Nessus	PhotonOS Local Security Checks	high
303656	Linux Distros Unpatched Vulnerability : CVE-2026-23281	Nessus	Misc.	high

Detections

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CVE-2026-23281

medium

Tenable Plugins

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high

high