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ALSA-2025:19409 — Moderate: kernel security update

Affected: AlmaLinux:9: kernel, AlmaLinux:9: kernel-64k, AlmaLinux:9: kernel-64k-core, AlmaLinux:9: kernel-64k-debug, AlmaLinux:9: kernel-64k-debug-core, AlmaLinux:9: kernel-64k-debug-devel, AlmaLinux:9: kernel-64k-debug-devel-matched, AlmaLinux:9: kernel-64k-debug-modules, AlmaLinux:9: kernel-64k-debug-modules-core, AlmaLinux:9: kernel-64k-debug-modules-extra and 66 more

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

Security Fix(es):

* kernel: ipv6: sr: Fix MAC comparison to be constant-time (CVE-2025-39702) * kernel: fs: fix UAF/GPF bug in nilfs_mdt_destroy (CVE-2022-50367) * kernel: crypto: xts - Handle EBUSY correctly (CVE-2023-53494)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2025-12788

BELL-CVE-2023-53494

Affected: Alpaquita:stream: linux-lts

certfr-2025-avi-0895 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE. Certaines d'entre elles permettent à un at…

certfr-2025-avi-0895

EUVD-2026-345226

fkie_cve-2023-53494

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

crypto: xts - Handle EBUSY correctly

As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request.

However, as the caller of xts may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free.

GHSA-3646-gh58-xhcx

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

crypto: xts - Handle EBUSY correctly

As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request.

However, as the caller of xts may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free.

RHSA-2025:19409 — Red Hat Security Advisory: kernel security update

kernel: fs: fix UAF/GPF bug in nilfs_mdt_destroy kernel: crypto: xts - Handle EBUSY correctly kernel: ipv6: sr: Fix MAC comparison to be constant-time

RHSA-2025:21051 — Red Hat Security Advisory: kernel security update

kernel: net: sched: sfb: fix null pointer access issue when sfb_init() fails kernel: fs: fix UAF/GPF bug in nilfs_mdt_destroy kernel: iomap: iomap: fix memory corruption when recording errors during writeback kernel: mm: fix zswap writeback race condition kernel: wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes kernel: wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies() kernel: wifi: mwifiex: Fix OOB and integer underflow when rx packets kernel: mt76: mt7921: fix kernel panic by accessing unallocated eeprom.data kernel: Bluetooth: L2CAP: Fix use-after-free kernel: pstore/ram: Check start of empty przs during init kernel: crypto: seqiv - Handle EBUSY correctly kernel: Bluetooth: Fix potential use-after-free when clear keys kernel: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() kernel: crypto: xts - Handle EBUSY correctly kernel: eventpoll: Fix semi-unbounded recursion kernel: NFS: Fix a race when updating an existing write

SUSE-SU-2025:03615-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2023-53494

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:Pro:18.04:LTS: linux-aws-5.4, Ubuntu:18.04:LTS: linux-azure, Ubuntu:18.04:LTS: linux-azure-5.3, Ubuntu:Pro:18.04:LTS: linux-azure-5.4, Ubuntu:18.04:LTS: linux-azure-edge, Ubuntu:18.04:LTS: linux-gcp, Ubuntu:18.04:LTS: linux-gcp-5.3 and 139 more

In the Linux kernel, the following vulnerability has been resolved: crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request. However, as the caller of xts may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free.

WID-SEC-W-2025-2187 — Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen und um nicht nähere beschriebene Effekte zu verursachen.