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ALSA-2026:75746 — Important: kernel-rt security, bug fix, and enhancement update

Affected: AlmaLinux:8: kernel-rt, AlmaLinux:8: kernel-rt-core, AlmaLinux:8: kernel-rt-debug, AlmaLinux:8: kernel-rt-debug-core, AlmaLinux:8: kernel-rt-debug-devel, AlmaLinux:8: kernel-rt-debug-modules, AlmaLinux:8: kernel-rt-debug-modules-extra, AlmaLinux:8: kernel-rt-devel, AlmaLinux:8: kernel-rt-modules, AlmaLinux:8: kernel-rt-modules-extra

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: Linux kernel: Use-after-free in xc5000 tuner driver due to race condition (CVE-2025-39994) * kernel: gfs2: Fix unlikely race in gdlm_put_lock (CVE-2025-40242) * kernel: Linux kernel: Denial of Service in RDMA/bnxt_re driver due to race condition during QP destruction (CVE-2023-54048) * kernel: nvme-pci: fix mempool alloc size (CVE-2022-50756) * kernel: Linux kernel: Denial of Service in QFQ scheduler via child qlen manipulation (CVE-2026-23105) * kernel: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send (CVE-2026-45856) * kernel: gfs2: Fix slab-use-after-free in qd_put (CVE-2026-45861) * kernel: net/sched: act_ct: Only release RCU read lock after ct_ft (CVE-2026-46319) * kernel: gfs2: add some missing log locking (CVE-2026-53049) * kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972) * kernel: net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list (CVE-2026-53230) * kernel: ipvs: clear the svc scheduler ptr early on edit (CVE-2026-53270) * kernel: net: ip_gre: require CAP_NET_ADMIN in the device netns for changelink (CVE-2026-63829) * kernel: KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path (CVE-2026-63794) * kernel: tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() (CVE-2026-63992)…

bdu:2026-02710

BELL-CVE-2025-39994

Affected: Alpaquita:23: linux-lts, Alpaquita:25: linux-lts, Alpaquita:stream: linux-lts

certfr-2025-avi-0899 — De multiples vulnérabilités ont été découvertes dans les produits Microsoft. Certaines d'entre elles permettent à un at…

certfr-2025-avi-0899

EUVD-2026-347297

fkie_cve-2025-39994

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

media: tuner: xc5000: Fix use-after-free in xc5000_release

The original code uses cancel_delayed_work() in xc5000_release(), which does not guarantee that the delayed work item timer_sleep has fully completed if it was already running. This leads to use-after-free scenarios where xc5000_release() may free the xc5000_priv while timer_sleep is still active and attempts to dereference the xc5000_priv.

A typical race condition is illustrated below:

Replace cancel_delayed_work() with cancel_delayed_work_sync() to ensure that the timer_sleep is properly canceled before the xc5000_priv memory is deallocated.

A deadlock concern was considered: xc5000_release() is called in a process context and is not holding any locks that the timer_sleep work item might also need. Therefore, the use of the _sync() variant is safe here.

This bug was initially identified through static analysis.

[hverkuil: fix typo in Subject: tunner -> tuner]

GHSA-ghgh-r6c5-cgx8

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

media: tuner: xc5000: Fix use-after-free in xc5000_release

A typical race condition is illustrated below:

Replace cancel_delayed_work() with cancel_delayed_work_sync() to ensure that the timer_sleep is properly canceled before the xc5000_priv memory is deallocated.

This bug was initially identified through static analysis.

[hverkuil: fix typo in Subject: tunner -> tuner]

msrc_CVE-2025-39994 — media: tuner: xc5000: Fix use-after-free in xc5000_release

msrc_CVE-2025-39994

OESA-2025-2772 — kernel security update

Affected: openEuler:22.03-LTS-SP3: kernel

The Linux Kernel, the operating system core itself. Security Fix(es):

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

media: davinci: vpif: fix use-after-free on driver unbind

The driver allocates and registers two platform device structures during probe, but the devices were never deregistered on driver unbind.

This results in a use-after-free on driver unbind as the device structures were allocated using devres and would be freed by driver core when remove() returns.

Fix this by adding the missing deregistration calls to the remove() callback and failing probe on registration errors.

Note that the platform device structures must be freed using a proper release callback to avoid leaking associated resources like device names.(CVE-2021-47653)

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

mmc: core: use sysfs_emit() instead of sprintf()

sprintf() (still used in the MMC core for the sysfs output) is vulnerable to the buffer overflow. Use the new-fangled sysfs_emit() instead.

Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.(CVE-2022-49267)

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

Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event

We should not access skb buffer data anymore after hci_recv_frame was called.

[ 39.634809] BUG: KASAN: use-after-free in btmtksdio_recv_event+0x1b0 [ 39.634855] Read of size 1 at addr ffffff80cf28a60d by tas…

openSUSE-SU-2025:15671-1 — kernel-devel-6.17.5-1.1 on GA media

kernel-devel-6.17.5-1.1 on GA media

RHSA-2026:75746 — Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update

kernel: nvme-pci: fix mempool alloc size kernel: Linux kernel: Denial of Service in RDMA/bnxt_re driver due to race condition during QP destruction kernel: Linux kernel: Use-after-free in xc5000 tuner driver due to race condition kernel: gfs2: Fix unlikely race in gdlm_put_lock kernel: Linux kernel: Denial of Service in QFQ scheduler via child qlen manipulation kernel: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send kernel: gfs2: Fix slab-use-after-free in qd_put kernel: net/sched: act_ct: Only release RCU read lock after ct_ft kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 kernel: gfs2: add some missing log locking kernel: net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list kernel: ipvs: clear the svc scheduler ptr early on edit kernel: KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path kernel: net: ip_gre: require CAP_NET_ADMIN in the device netns for changelink kernel: tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() kernel: tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() kernel: vxlan: require CAP_NET_ADMIN in the device netns for changelink kernel: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink kernel: netfilter: nf_queue: pin bridge device while NFQUEUE holds fake dst kernel: KVM: SVM: Update x2APIC MSR intercepts if AVIC is inhibited while L2 is active kernel: netfilter: nf_conntrack_sip: widen NAT rewrite delta to s32 in sip_help_…

RLSA-2026:75746 — Important: kernel-rt security, bug fix, and enhancement update

Affected: Rocky Linux:8: kernel-rt

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: Linux kernel: Use-after-free in xc5000 tuner driver due to race condition (CVE-2025-39994)

* kernel: gfs2: Fix unlikely race in gdlm_put_lock (CVE-2025-40242)

* kernel: Linux kernel: Denial of Service in RDMA/bnxt_re driver due to race condition during QP destruction (CVE-2023-54048)

* kernel: nvme-pci: fix mempool alloc size (CVE-2022-50756)

* kernel: Linux kernel: Denial of Service in QFQ scheduler via child qlen manipulation (CVE-2026-23105)

* kernel: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send (CVE-2026-45856)

* kernel: gfs2: Fix slab-use-after-free in qd_put (CVE-2026-45861)

* kernel: net/sched: act_ct: Only release RCU read lock after ct_ft (CVE-2026-46319)

* kernel: gfs2: add some missing log locking (CVE-2026-53049)

* kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972)

* kernel: net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list (CVE-2026-53230)

* kernel: ipvs: clear the svc scheduler ptr early on edit (CVE-2026-53270)

* kernel: net: ip_gre: require CAP_NET_ADMIN in the device netns for changelink (CVE-2026-63829)

* kernel: KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path (CVE-2026-63794)

* kernel: tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() (CVE-2026-63992)

* kernel: tunnels: l…

SUSE-SU-2025:21040-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2025-39994

Affected: Ubuntu:Pro:14.04:LTS: linux-aws, Ubuntu:Pro:14.04:LTS: linux-azure, Ubuntu:Pro:14.04:LTS: linux-lts-xenial, Ubuntu:Pro:16.04:LTS: linux, Ubuntu:Pro:16.04:LTS: linux-aws, Ubuntu:Pro:16.04:LTS: linux-aws-hwe, Ubuntu:Pro:16.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-gcp, Ubuntu:Pro:16.04:LTS: linux-hwe, Ubuntu:16.04:LTS: linux-hwe-edge and 222 more

In the Linux kernel, the following vulnerability has been resolved: media: tuner: xc5000: Fix use-after-free in xc5000_release The original code uses cancel_delayed_work() in xc5000_release(), which does not guarantee that the delayed work item timer_sleep has fully completed if it was already running. This leads to use-after-free scenarios where xc5000_release() may free the xc5000_priv while timer_sleep is still active and attempts to dereference the xc5000_priv. A typical race condition is illustrated below: CPU 0 (release thread) | CPU 1 (delayed work callback) xc5000_release() | xc5000_do_timer_sleep() cancel_delayed_work() | hybrid_tuner_release_state(priv) | kfree(priv) | | priv = container_of() // UAF Replace cancel_delayed_work() with cancel_delayed_work_sync() to ensure that the timer_sleep is properly canceled before the xc5000_priv memory is deallocated. A deadlock concern was considered: xc5000_release() is called in a process context and is not holding any locks that the timer_sleep work item might also need. Therefore, the use of the _sync() variant is safe here. This bug was initially identified through static analysis. [hverkuil: fix typo in Subject: tunner -> tuner]

WID-SEC-W-2025-2298 — Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux-Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen, Daten zu manipulieren und andere, nicht näher spezifizierte Angriffe durchzuführen.