In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU in ip6_xmit() Use RCU in ip6_xmit() in order to use dst_dev_rcu() to prevent possible UAF.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2025:20172-1 advisory.

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

    The following security issues were fixed:

    - CVE-2022-50253: bpf: make sure skb->len != 0 when redirecting to a tunneling device (bsc#1249912).
    - CVE-2025-37916: pds_core: remove write-after-free of client_id (bsc#1243474).
    - CVE-2025-38084: mm/hugetlb: unshare page tables during VMA split, not before (bsc#1245431 bsc#1245498).
    - CVE-2025-38085: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race (bsc#1245431 bsc#1245499).
    - CVE-2025-38321: smb: Log an error when close_all_cached_dirs fails (bsc#1246328).
    - CVE-2025-38728: smb3: fix for slab out of bounds on mount to ksmbd (bsc#1249256).
    - CVE-2025-39805: net: macb: fix unregister_netdev call order in macb_remove() (bsc#1249982).
    - CVE-2025-39819: fs/smb: Fix inconsistent refcnt update (bsc#1250176).
    - CVE-2025-39822: io_uring/kbuf: fix signedness in this_len calculation (bsc#1250034).
    - CVE-2025-39831: fbnic: Move phylink resume out of service_task and into open/close (bsc#1249977).
    - CVE-2025-39859: ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog (bsc#1250252).
    - CVE-2025-39897: net: xilinx: axienet: Add error handling for RX metadata pointer retrieval     (bsc#1250746).
    - CVE-2025-39917: bpf: Fix out-of-bounds dynptr write in bpf_crypto_crypt (bsc#1250723).
    - CVE-2025-39944: octeontx2-pf: Fix use-after-free bugs in otx2_sync_tstamp() (bsc#1251120).
    - CVE-2025-39961: iommu/amd/pgtbl: Fix possible race while increase page table level (bsc#1251817).
    - CVE-2025-39980: nexthop: Forbid FDB status change while nexthop is in a group (bsc#1252063).
    - CVE-2025-39990: bpf: Check the helper function is valid in get_helper_proto (bsc#1252054).
    - CVE-2025-40001: scsi: mvsas: Fix use-after-free bugs in mvs_work_queue (bsc#1252303).
    - CVE-2025-40003: net: mscc: ocelot: Fix use-after-free caused by cyclic delayed work (bsc#1252301).
    - CVE-2025-40006: mm/hugetlb: fix folio is still mapped when deleted (bsc#1252342).
    - CVE-2025-40021: tracing: dynevent: Add a missing lockdown check on dynevent (bsc#1252681).
    - CVE-2025-40024: vhost: Take a reference on the task in struct vhost_task (bsc#1252686).
    - CVE-2025-40027: net/9p: fix double req put in p9_fd_cancelled (bsc#1252763).
    - CVE-2025-40031: tee: fix register_shm_helper() (bsc#1252779).
    - CVE-2025-40033: remoteproc: pru: Fix potential NULL pointer dereference in pru_rproc_set_ctable()     (bsc#1252824).
    - CVE-2025-40038: KVM: SVM: Skip fastpath emulation on VM-Exit if next RIP isn't valid (bsc#1252817).
    - CVE-2025-40047: io_uring/waitid: always prune wait queue entry in io_waitid_wait() (bsc#1252790).
    - CVE-2025-40053: net: dlink: handle copy_thresh allocation failure (bsc#1252808).
    - CVE-2025-40055: ocfs2: fix double free in user_cluster_connect() (bsc#1252821).
    - CVE-2025-40059: coresight: Fix incorrect handling for return value of devm_kzalloc (bsc#1252809).
    - CVE-2025-40064: smc: Fix use-after-free in __pnet_find_base_ndev() (bsc#1252845).
    - CVE-2025-40070: pps: fix warning in pps_register_cdev when register device fail (bsc#1252836).
    - CVE-2025-40074: tcp: convert to dev_net_rcu() (bsc#1252794).
    - CVE-2025-40075: tcp_metrics: use dst_dev_net_rcu() (bsc#1252795).
    - CVE-2025-40081: perf: arm_spe: Prevent overflow in PERF_IDX2OFF() (bsc#1252776).
    - CVE-2025-40083: net/sched: sch_qfq: Fix null-deref in agg_dequeue (bsc#1252912).
    - CVE-2025-40086: drm/xe: Don't allow evicting of BOs in same VM in array of VM binds (bsc#1252923).
    - CVE-2025-40098: ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_get_acpi_mute_state()     (bsc#1252917).
    - CVE-2025-40101: btrfs: fix memory leaks when rejecting a non SINGLE data profile without an RST     (bsc#1252901).
    - CVE-2025-40102: KVM: arm64: Prevent access to vCPU events before init (bsc#1252919).
    - CVE-2025-40105: vfs: Don't leak disconnected dentries on umount (bsc#1252928).
    - CVE-2025-40133: mptcp: Call dst_release() in mptcp_active_enable() (bsc#1253328).
    - CVE-2025-40134: dm: fix NULL pointer dereference in __dm_suspend() (bsc#1253386).
    - CVE-2025-40135: ipv6: use RCU in ip6_xmit() (bsc#1253342).
    - CVE-2025-40139: smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set() (bsc#1253409).
    - CVE-2025-40149: tls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock() (bsc#1253355).
    - CVE-2025-40153: mm: hugetlb: avoid soft lockup when mprotect to large memory area (bsc#1253408).
    - CVE-2025-40157: EDAC/i10nm: Skip DIMM enumeration on a disabled memory controller (bsc#1253423).
    - CVE-2025-40158: ipv6: use RCU in ip6_output() (bsc#1253402).
    - CVE-2025-40159: xsk: Harden userspace-supplied xdp_desc validation (bsc#1253403).
    - CVE-2025-40168: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (bsc#1253427).
    - CVE-2025-40169: bpf: Reject negative offsets for ALU ops (bsc#1253416).
    - CVE-2025-40173: net/ip6_tunnel: Prevent perpetual tunnel growth (bsc#1253421).
    - CVE-2025-40175: idpf: cleanup remaining SKBs in PTP flows (bsc#1253426).
    - CVE-2025-40176: tls: wait for pending async decryptions if tls_strp_msg_hold fails (bsc#1253425).
    - CVE-2025-40178: pid: Add a judgment for ns null in pid_nr_ns (bsc#1253463).
    - CVE-2025-40185: ice: ice_adapter: release xa entry on adapter allocation failure (bsc#1253394).
    - CVE-2025-40201: kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64()     paths (bsc#1253455).
    - CVE-2025-40203: listmount: don't call path_put() under namespace semaphore (bsc#1253457).

    The following non security issues were fixed:

    - ACPI: scan: Update honor list for RPMI System MSI (stable-fixes).
    - ACPICA: Update dsmethod.c to get rid of unused variable warning (stable-fixes).
    - Disable CONFIG_CPU5_WDT The cpu5wdt driver doesn't implement a       proper watchdog interface and has many code issues. It only handles       obscure and obsolete hardware. Stop building and supporting this driver       (jsc#PED-14062).
    - Fix drm/xe: Don't allow evicting of BOs in same VM in array of VM binds (bsc#1252923)
    - KVM: SVM: Delete IRTE link from previous vCPU before setting new IRTE (git-fixes).
    - KVM: SVM: Delete IRTE link from previous vCPU irrespective of new routing (git-fixes).
    - KVM: SVM: Mark VMCB_LBR dirty when MSR_IA32_DEBUGCTLMSR is updated (git-fixes).
    - KVM: s390: improve interrupt cpu for wakeup (bsc#1235463).
    - KVM: s390: kABI backport for 'last_sleep_cpu' (bsc#1252352).
    - KVM: x86/mmu: Return -EAGAIN if userspace deletes/moves memslot during prefault (git-fixes).
    - PCI/ERR: Update device error_state already after reset (stable-fixes).
    - PM: EM: Slightly reduce em_check_capacity_update() overhead (stable-fixes).
    - Revert net/mlx5e: Update and set Xon/Xoff upon MTU set (git-fixes).
    - Revert net/mlx5e: Update and set Xon/Xoff upon port speed set (git-fixes).
    - Update config files: enable zstd module decompression (jsc#PED-14115).
    - bpf/selftests: Fix test_tcpnotify_user (bsc#1253635).
    - btrfs: do not clear read-only when adding sprout device (bsc#1253238).
    - btrfs: do not update last_log_commit when logging inode due to a new name (git-fixes).
    - dm: fix queue start/stop imbalance under suspend/load/resume races (bsc#1253386)
    - drm/amd/display: Add AVI infoframe copy in copy_stream_update_to_stream (stable-fixes).
    - drm/amd/display: update color on atomic commit time (stable-fixes).
    - drm/amd/display: update dpp/disp clock from smu clock table (stable-fixes).
    - drm/radeon: delete radeon_fence_process in is_signaled, no deadlock (stable-fixes).
    - hwmon: (lenovo-ec-sensors) Update P8 supprt (stable-fixes).
    - media: amphion: Delete v4l2_fh synchronously in .release() (stable-fixes).
    - mount: handle NULL values in mnt_ns_release() (bsc#1254308)
    - net/smc: Remove validation of reserved bits in CLC Decline (bsc#1252357).
    - net: phy: move realtek PHY driver to its own subdirectory (jsc#PED-14353).
    - net: phy: realtek: add defines for shadowed c45 standard registers (jsc#PED-14353).
    - net: phy: realtek: add helper RTL822X_VND2_C22_REG (jsc#PED-14353).
    - net: phy: realtek: change order of calls in C22 read_status() (jsc#PED-14353).
    - net: phy: realtek: clear 1000Base-T link partner advertisement (jsc#PED-14353).
    - net: phy: realtek: improve mmd register access for internal PHY's (jsc#PED-14353).
    - net: phy: realtek: read duplex and gbit master from PHYSR register (jsc#PED-14353).
    - net: phy: realtek: switch from paged to MMD ops in rtl822x functions (jsc#PED-14353).
    - net: phy: realtek: use string choices helpers (jsc#PED-14353).
    - net: xilinx: axienet: Fix IRQ coalescing packet count overflow (bsc#1250746)
    - net: xilinx: axienet: Fix RX skb ring management in DMAengine mode (bsc#1250746)
    - net: xilinx: axienet: Fix Tx skb circular buffer occupancy check in dmaengine xmit (bsc#1250746)
    - nvmet-auth: update sc_c in host response (git-fixes bsc#1249397).
    - nvmet-auth: update sc_c in target host hash calculation (git-fixes).
    - perf list: Add IBM z17 event descriptions (jsc#PED-13611).
    - platform/x86:intel/pmc: Update Arrow Lake telemetry GUID (git-fixes).
    - powercap: intel_rapl: Add support for Panther Lake platform (jsc#PED-13949).
    - pwm: pca9685: Use bulk write to atomicially update registers (stable-fixes).
    - r8169: add PHY c45 ops for MDIO_MMD_VENDOR2 registers (jsc#PED-14353).
    - r8169: add support for Intel Killer E5000 (jsc#PED-14353).
    - r8169: add support for RTL8125BP rev.b (jsc#PED-14353).
    - r8169: add support for RTL8125D rev.b (jsc#PED-14353).
    - r8169: adjust version numbering for RTL8126 (jsc#PED-14353).
    - r8169: align RTL8125 EEE config with vendor driver (jsc#PED-14353).
    - r8169: align RTL8125/RTL8126 PHY config with vendor driver (jsc#PED-14353).
    - r8169: align RTL8126 EEE config with vendor driver (jsc#PED-14353).
    - r8169: align WAKE_PHY handling with r8125/r8126 vendor drivers (jsc#PED-14353).
    - r8169: avoid duplicated messages if loading firmware fails and switch to warn level (jsc#PED-14353).
    - r8169: don't take RTNL lock in rtl_task() (jsc#PED-14353).
    - r8169: enable EEE at 2.5G per default on RTL8125B (jsc#PED-14353).
    - r8169: enable RTL8168H/RTL8168EP/RTL8168FP ASPM support (jsc#PED-14353).
    - r8169: fix inconsistent indenting in rtl8169_get_eth_mac_stats (jsc#PED-14353).
    - r8169: implement additional ethtool stats ops (jsc#PED-14353).
    - r8169: improve __rtl8169_set_wol (jsc#PED-14353).
    - r8169: improve initialization of RSS registers on RTL8125/RTL8126 (jsc#PED-14353).
    - r8169: improve rtl_set_d3_pll_down (jsc#PED-14353).
    - r8169: increase max jumbo packet size on RTL8125/RTL8126 (jsc#PED-14353).
    - r8169: remove leftover locks after reverted change (jsc#PED-14353).
    - r8169: remove original workaround for RTL8125 broken rx issue (jsc#PED-14353).
    - r8169: remove rtl_dash_loop_wait_high/low (jsc#PED-14353).
    - r8169: remove support for chip version 11 (jsc#PED-14353).
    - r8169: remove unused flag RTL_FLAG_TASK_RESET_NO_QUEUE_WAKE (jsc#PED-14353).
    - r8169: replace custom flag with disable_work() et al (jsc#PED-14353).
    - r8169: switch away from deprecated pcim_iomap_table (jsc#PED-14353).
    - r8169: use helper r8169_mod_reg8_cond to simplify rtl_jumbo_config (jsc#PED-14353).
    - ring-buffer: Update pages_touched to reflect persistent buffer content (git-fixes).
    - s390/mm: Fix __ptep_rdp() inline assembly (bsc#1253643).
    - sched/fair: Get rid of sched_domains_curr_level hack for tl->cpumask() (bsc#1246843).
    - sched/fair: Have SD_SERIALIZE affect newidle balancing (bsc#1248792).
    - sched/fair: Proportional newidle balance (bsc#1248792).
    - sched/fair: Proportional newidle balance -KABI (bsc#1248792).
    - sched/fair: Revert max_newidle_lb_cost bump (bsc#1248792).
    - sched/fair: Skip sched_balance_running cmpxchg when balance is not due (bsc#1248792).
    - sched/fair: Small cleanup to sched_balance_newidle() (bsc#1248792).
    - sched/fair: Small cleanup to update_newidle_cost() (bsc#1248792).
    - scsi: lpfc: Add capability to register Platform Name ID to fabric (bsc#1254119).
    - scsi: lpfc: Allow support for BB credit recovery in point-to-point topology (bsc#1254119).
    - scsi: lpfc: Ensure unregistration of rpis for received PLOGIs (bsc#1254119).
    - scsi: lpfc: Fix leaked ndlp krefs when in point-to-point topology (bsc#1254119).
    - scsi: lpfc: Fix reusing an ndlp that is marked NLP_DROPPED during FLOGI (bsc#1254119).
    - scsi: lpfc: Modify kref handling for Fabric Controller ndlps (bsc#1254119).
    - scsi: lpfc: Remove redundant NULL ptr assignment in lpfc_els_free_iocb() (bsc#1254119).
    - scsi: lpfc: Revise discovery related function headers and comments (bsc#1254119).
    - scsi: lpfc: Update lpfc version to 14.4.0.12 (bsc#1254119).
    - scsi: lpfc: Update various NPIV diagnostic log messaging (bsc#1254119).
    - selftests/run_kselftest.sh: Add `--skip` argument option (bsc#1254221).
    - smpboot: introduce SDTL_INIT() helper to tidy sched topology setup (bsc#1246843).
    - soc/tegra: fuse: speedo-tegra210: Update speedo IDs (git-fixes).
    - spi: tegra210-quad: Check hardware status on timeout (bsc#1253155)
    - spi: tegra210-quad: Fix timeout handling (bsc#1253155)
    - spi: tegra210-quad: Refactor error handling into helper functions (bsc#1253155)
    - spi: tegra210-quad: Update dummy sequence configuration (git-fixes)
    - tcp_bpf: Call sk_msg_free() when tcp_bpf_send_verdict() fails to allocate psock->cork (bsc#1250705).
    - wifi: ath11k: Add quirk entries for Thinkpad T14s Gen3 AMD (bsc#1254181).
    - wifi: mt76: do not add wcid entries to sta poll list during MCU reset (bsc#1254315).
    - wifi: mt76: introduce mt792x_config_mac_addr_list routine (bsc#1254315).
    - wifi: mt76: mt7925: Fix logical vs bitwise typo (bsc#1254315).
    - wifi: mt76: mt7925: Remove unnecessary if-check (bsc#1254315).
    - wifi: mt76: mt7925: Simplify HIF suspend handling to avoid suspend fail (bsc#1254315).
    - wifi: mt76: mt7925: add EHT control support based on the CLC data (bsc#1254315).
    - wifi: mt76: mt7925: add handler to hif suspend/resume event (bsc#1254315).
    - wifi: mt76: mt7925: add pci restore for hibernate (bsc#1254315).
    - wifi: mt76: mt7925: config the dwell time by firmware (bsc#1254315).
    - wifi: mt76: mt7925: extend MCU support for testmode (bsc#1254315).
    - wifi: mt76: mt7925: fix CLC command timeout when suspend/resume (bsc#1254315).
    - wifi: mt76: mt7925: fix missing hdr_trans_tlv command for broadcast wtbl (bsc#1254315).
    - wifi: mt76: mt7925: fix the unfinished command of regd_notifier before suspend (bsc#1254315).
    - wifi: mt76: mt7925: refine the txpower initialization flow (bsc#1254315).
    - wifi: mt76: mt7925: replace zero-length array with flexible-array member (bsc#1254315).
    - wifi: mt76: mt7925: update the channel usage when the regd domain changed (bsc#1254315).
    - wifi: mt76: mt7925e: fix too long of wifi resume time (bsc#1254315).
    - x86/smpboot: avoid SMT domain attach/destroy if SMT is not enabled (bsc#1246843).
    - x86/smpboot: moves x86_topology to static initialize and truncate (bsc#1246843).
    - x86/smpboot: remove redundant CONFIG_SCHED_SMT (bsc#1246843).

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.

  - ipv6: use RCU in ip6_xmit() Use RCU in ip6_xmit() in order to use dst_dev_rcu() to prevent possible UAF.
    (CVE-2025-40135)

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

ID	Name	Product	Family	Severity
296481	SUSE SLES15 Security Update : kernel (SUSE-SU-2026:0278-1)	Nessus	SuSE Local Security Checks	high
279677	openSUSE 16 Security Update : kernel (openSUSE-SU-2025:20172-1)	Nessus	SuSE Local Security Checks	high
279478	Photon OS 5.0: Linux PHSA-2025-5.0-0715	Nessus	PhotonOS Local Security Checks	high
277931	Photon OS 4.0: Linux PHSA-2025-4.0-0923	Nessus	PhotonOS Local Security Checks	high
275216	Linux Distros Unpatched Vulnerability : CVE-2025-40135	Nessus	Misc.	high

Detections

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CVE-2025-40135

medium

Tenable Plugins

high

high

high

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high