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ALSA-2025:11855 — Moderate: kernel security update

Affected: AlmaLinux:10: kernel-abi-stablelists, AlmaLinux:10: kernel-doc

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

Security Fix(es):

* kernel: RDMA/mlx5: Fix page_size variable overflow (CVE-2025-22091) * kernel: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() (CVE-2025-22121) * kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling (CVE-2025-37797) * kernel: powerpc/powernv/memtrace: Fix out of bounds issue in memtrace mmap (CVE-2025-38088) * kernel: net/mdiobus: Fix potential out-of-bounds clause 45 read/write access (CVE-2025-38110)

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:2025-12087

BELL-CVE-2025-37797

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

certfr-2025-avi-0463 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian LTS. Elles permettent à un attaquant de p…

certfr-2025-avi-0463

EUVD-2026-346819

fkie_cve-2025-37797

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

net_sched: hfsc: Fix a UAF vulnerability in class handling

This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfsc_change_class() when working with certain child qdiscs like netem or codel.

The vulnerability works as follows: 1. hfsc_change_class() checks if a class has packets (q.qlen != 0) 2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g., codel, netem) might drop packets and empty the queue 3. The code continues assuming the queue is still non-empty, adding the class to vttree 4. This breaks HFSC scheduler assumptions that only non-empty classes are in vttree 5. Later, when the class is destroyed, this can lead to a Use-After-Free

The fix adds a second queue length check after qdisc_peek_len() to verify the queue wasn't emptied.

GHSA-hvr4-ppmm-c7fp

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

net_sched: hfsc: Fix a UAF vulnerability in class handling

The fix adds a second queue length check after qdisc_peek_len() to verify the queue wasn't emptied.

msrc_CVE-2025-37797 — net_sched: hfsc: Fix a UAF vulnerability in class handling

msrc_CVE-2025-37797

OESA-2025-1878 — kernel security update

Affected: openEuler:24.03-LTS: kernel

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

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

bpf: consider that tail calls invalidate packet pointers

Tail-called programs could execute any of the helpers that invalidate packet pointers. Hence, conservatively assume that each tail call invalidates packet pointers.

Making the change in bpf_helper_changes_pkt_data() automatically makes use of check_cfg() logic that computes 'changes_pkt_data' effect for global sub-programs, such that the following program could be rejected:

int tail_call(struct __sk_buff *sk) { bpf_tail_call_static(sk, &jmp_table, 0); return 0; }

SEC("tc") int not_safe(struct __sk_buff *sk) { int *p = (void *)(long)sk->data; ... make p valid ... tail_call(sk); *p = 42; /* this is unsafe */ ... }

The tc_bpf2bpf.c:subprog_tc() needs change: mark it as a function that can invalidate packet pointers. Otherwise, it can't be freplaced with tailcall_freplace.c:entry_freplace() that does a tail call.(CVE-2024-58237)

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

RDMA/rxe: Fix the warning "__rxe_cleanup+0x12c/0x170 [rdma_rxe]"

The Call Trace is as below: " <TASK> ? show_regs.cold+0x1a/0x1f ? __rxe_cleanup+0x12c/0x170 [rdma_rxe] ? __warn+0x84/0xd0 ? __rxe_cleanup+0x12c/0x170 [rdma_rxe] ? report_bug+0x105/0x180 ? han…

RHSA-2025:11855 — Red Hat Security Advisory: kernel security update

kernel: RDMA/mlx5: Fix page_size variable overflow kernel: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling kernel: powerpc/powernv/memtrace: Fix out of bounds issue in memtrace mmap kernel: net/mdiobus: Fix potential out-of-bounds clause 45 read/write access

RHSA-2025:11861 — Red Hat Security Advisory: kernel security update

kernel: media: uvcvideo: Fix double free in error path kernel: wifi: iwlwifi: limit printed string from FW file kernel: RDMA/core: Fix use-after-free when rename device name kernel: RDMA/mlx5: Fix page_size variable overflow kernel: ext4: avoid journaling sb update on error if journal is destroying kernel: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling kernel: mm/huge_memory: fix dereferencing invalid pmd migration entry kernel: net: ch9200: fix uninitialised access during mii_nway_restart kernel: net/mdiobus: Fix potential out-of-bounds clause 45 read/write access

SUSE-SU-2025:01919-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2025-37797

Affected: Ubuntu:Pro:14.04:LTS: linux-azure, 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:Pro:16.04:LTS: linux-oracle, Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:Pro:18.04:LTS: linux, Ubuntu:Pro:18.04:LTS: linux-aws, Ubuntu:18.04:LTS: linux-aws-5.0 and 193 more

In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfsc_change_class() when working with certain child qdiscs like netem or codel. The vulnerability works as follows: 1. hfsc_change_class() checks if a class has packets (q.qlen != 0) 2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g., codel, netem) might drop packets and empty the queue 3. The code continues assuming the queue is still non-empty, adding the class to vttree 4. This breaks HFSC scheduler assumptions that only non-empty classes are in vttree 5. Later, when the class is destroyed, this can lead to a Use-After-Free The fix adds a second queue length check after qdisc_peek_len() to verify the queue wasn't emptied.

WID-SEC-W-2025-0932 — Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um einen Denial of Service Angriff oder einen unspezifischen Angriff durchzuführen.