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ALSA-2025:8643 — Important: 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: net: gso: fix ownership in __udp_gso_segment (CVE-2025-21926) * kernel: vlan: enforce underlying device type (CVE-2025-21920) * kernel: xsk: fix an integer overflow in xp_create_and_assign_umem() (CVE-2025-21997) * kernel: net: fix geneve_opt length integer overflow (CVE-2025-22055) * kernel: ext4: fix OOB read when checking dotdot dir (CVE-2025-37785) * kernel: wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi (CVE-2025-37943)

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:2025-11625

BELL-CVE-2025-21997

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

certfr-2025-avi-0333 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian. Elles permettent à un attaquant de provo…

certfr-2025-avi-0333

EUVD-2026-314139

fkie_cve-2025-21997

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

xsk: fix an integer overflow in xp_create_and_assign_umem()

Since the i and pool->chunk_size variables are of type 'u32', their product can wrap around and then be cast to 'u64'. This can lead to two different XDP buffers pointing to the same memory area.

Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

GHSA-pg24-62pw-76fp

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

xsk: fix an integer overflow in xp_create_and_assign_umem()

Since the i and pool->chunk_size variables are of type 'u32', their product can wrap around and then be cast to 'u64'. This can lead to two different XDP buffers pointing to the same memory area.

Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

msrc_CVE-2025-21997 — xsk: fix an integer overflow in xp_create_and_assign_umem()

msrc_CVE-2025-21997

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-2025:8643 — Red Hat Security Advisory: kernel security update

kernel: vlan: enforce underlying device type kernel: net: gso: fix ownership in __udp_gso_segment kernel: xsk: fix an integer overflow in xp_create_and_assign_umem() kernel: net: fix geneve_opt length integer overflow kernel: ext4: fix OOB read when checking dotdot dir kernel: wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi

RHSA-2025:8669 — Red Hat Security Advisory: kernel security update

kernel: vsock/virtio: discard packets if the transport changes kernel: net: gso: fix ownership in __udp_gso_segment kernel: xsk: fix an integer overflow in xp_create_and_assign_umem() kernel: net: fix geneve_opt length integer overflow kernel: wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi

SUSE-SU-2025:02249-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2025-21997

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 110 more

In the Linux kernel, the following vulnerability has been resolved: xsk: fix an integer overflow in xp_create_and_assign_umem() Since the i and pool->chunk_size variables are of type 'u32', their product can wrap around and then be cast to 'u64'. This can lead to two different XDP buffers pointing to the same memory area. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

WID-SEC-W-2025-0698 — Linux Kernel: Mehrere Schwachstellen

Ein entfernter anonymer Angreifer kann mehrere Schwachstellen im Linux-Kernel ausnutzen, um einen 'Denial of Service'-Zustand zu erzeugen oder andere nicht spezifizierte Angriffe durchzuführen.