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ALSA-2026:68507 — Important: kernel security, bug fix, and enhancement update

Affected: AlmaLinux:10: kernel, AlmaLinux:10: kernel-64k, AlmaLinux:10: kernel-64k-core, AlmaLinux:10: kernel-64k-debug, AlmaLinux:10: kernel-64k-debug-core, AlmaLinux:10: kernel-64k-debug-devel, AlmaLinux:10: kernel-64k-debug-devel-matched, AlmaLinux:10: kernel-64k-debug-modules, AlmaLinux:10: kernel-64k-debug-modules-core, AlmaLinux:10: kernel-64k-debug-modules-extra and 65 more

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

Security Fix(es):

* kernel: soc: qcom: socinfo: Avoid out of bounds read of serial number (CVE-2024-58007) * kernel: Linux kernel t7xx WWAN driver: Denial of Service via buffer overflow (CVE-2026-23172) * kernel: net: ena: PHC: Fix potential use-after-free in get_timestamp (CVE-2026-52971) * kernel: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN (CVE-2026-53176) * kernel: ALSA: timer: Forcibly close timer instances at closing (CVE-2026-53193) * kernel: ALSA: timer: Fix UAF at snd_timer_user_params() (CVE-2026-53192) * kernel: wifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap (CVE-2026-63869) * kernel: ALSA: seq: Serialize UMP output teardown with event_input (CVE-2026-64029) * kernel: octeontx2-af: validate body pcifunc in rvu_mbox_handler_rep_event_notify (CVE-2026-63923) * kernel: wifi: iwlwifi: mvm: fix driver-set TX rates on old devices (CVE-2026-64176) * kernel: wifi: iwlwifi: mld: stop TX during firmware restart (CVE-2026-64175) * kernel: netfilter: handle unreadable frags (CVE-2026-64414) * kernel: hwrng: virtio: clamp device-reported used.len at copy_data() (CVE-2026-64456) * kernel: Linux kernel: ALSA timer use-after-free vulnerability allows privilege escalation (CVE-2026-68200) * kernel: Linux kernel SLIP: Out-of-bounds write due to race condition during MTU change (CVE-2026-68143) * kernel: Linux kernel (…

BELL-CVE-2026-68200

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

certfr-2026-avi-1069 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian LTS. Elles permettent à un attaquant de p…

certfr-2026-avi-1069

EUVD-2026-353499

fkie_cve-2026-68200

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

ALSA: timer: don't re-enter an instance callback that is still running

The userspace-driven timer (utimer) TRIGGER ioctl calls snd_timer_interrupt() directly with no serialization, so two threads triggering the same utimer can run snd_timer_interrupt() on one snd_timer concurrently.

snd_timer_process_callbacks() drops timer->lock around each instance callback and marks the in-flight callback with the single SNDRV_TIMER_IFLG_CALLBACK bit; snd_timer_close_locked() waits on that bit to drain an in-flight callback before freeing the instance. The bit cannot represent two concurrent callbacks: when a second interrupt re-queues an instance whose callback is still running, both run at once, the first to finish clears the bit, and the close-path drain then frees the instance (and its callback_data) while the other callback is still live - a use-after-free reachable by any user able to open /dev/snd/timer, both via a user timer instance and via a sequencer queue timer bound to the utimer.

snd_timer_interrupt() sets IFLG_CALLBACK before dropping timer->lock, so a concurrent interrupt already observes it under the lock. Skip re-queuing an instance (and its slaves) to the ack/sack list while its callback is in flight; the accumulated pticks are delivered on the next tick, so no event is lost.

GHSA-78vp-jqhh-pcc3

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

ALSA: timer: don't re-enter an instance callback that is still running

openSUSE-SU-2026:21910-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

RLSA-2026:68507 — Important: kernel security, bug fix, and enhancement update

Affected: Rocky Linux:10: kernel

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

Security Fix(es):

* kernel: soc: qcom: socinfo: Avoid out of bounds read of serial number (CVE-2024-58007)

* kernel: Linux kernel t7xx WWAN driver: Denial of Service via buffer overflow (CVE-2026-23172)

* kernel: net: ena: PHC: Fix potential use-after-free in get_timestamp (CVE-2026-52971)

* kernel: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN (CVE-2026-53176)

* kernel: ALSA: timer: Forcibly close timer instances at closing (CVE-2026-53193)

* kernel: ALSA: timer: Fix UAF at snd_timer_user_params() (CVE-2026-53192)

* kernel: wifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap (CVE-2026-63869)

* kernel: ALSA: seq: Serialize UMP output teardown with event_input (CVE-2026-64029)

* kernel: octeontx2-af: validate body pcifunc in rvu_mbox_handler_rep_event_notify (CVE-2026-63923)

* kernel: wifi: iwlwifi: mvm: fix driver-set TX rates on old devices (CVE-2026-64176)

* kernel: wifi: iwlwifi: mld: stop TX during firmware restart (CVE-2026-64175)

* kernel: netfilter: handle unreadable frags (CVE-2026-64414)

* kernel: hwrng: virtio: clamp device-reported used.len at copy_data() (CVE-2026-64456)

* kernel: Linux kernel: ALSA timer use-after-free vulnerability allows privilege escalation (CVE-2026-68200)

* kernel: Linux kernel SLIP: Out-of-bounds write due to race condition during MTU change (CVE-2026-68143)

* kernel: Linux kernel (ice): Denial of Servi…

SUSE-SU-2026:23881-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2026-68200

Affected: Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:18.04:LTS: linux-aws-5.0, Ubuntu:18.04:LTS: linux-aws-5.3, Ubuntu:18.04:LTS: linux-azure, Ubuntu:18.04:LTS: linux-azure-5.3, Ubuntu:18.04:LTS: linux-azure-edge, Ubuntu:18.04:LTS: linux-gcp, Ubuntu:18.04:LTS: linux-gcp-5.3, Ubuntu:18.04:LTS: linux-gke-4.15, Ubuntu:18.04:LTS: linux-gke-5.4 and 120 more

In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: don't re-enter an instance callback that is still running The userspace-driven timer (utimer) TRIGGER ioctl calls snd_timer_interrupt() directly with no serialization, so two threads triggering the same utimer can run snd_timer_interrupt() on one snd_timer concurrently. snd_timer_process_callbacks() drops timer->lock around each instance callback and marks the in-flight callback with the single SNDRV_TIMER_IFLG_CALLBACK bit; snd_timer_close_locked() waits on that bit to drain an in-flight callback before freeing the instance. The bit cannot represent two concurrent callbacks: when a second interrupt re-queues an instance whose callback is still running, both run at once, the first to finish clears the bit, and the close-path drain then frees the instance (and its callback_data) while the other callback is still live - a use-after-free reachable by any user able to open /dev/snd/timer, both via a user timer instance and via a sequencer queue timer bound to the utimer. snd_timer_interrupt() sets IFLG_CALLBACK before dropping timer->lock, so a concurrent interrupt already observes it under the lock. Skip re-queuing an instance (and its slaves) to the ack/sack list while its callback is in flight; the accumulated pticks are delivered on the next tick, so no event is lost.

WID-SEC-W-2026-2730 — Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, darunter möglicherweise die Ausführung von beliebigem Code, die Ausweitung von Berechtigungen, die Offenlegung von Informationen, die Manipulation von Daten oder Denial-of-Service-Zustände.