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🛡️ CVE-2025-22062 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

sctp: add mutual exclusion in proc_sctp_do_udp_port()

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

sctp: add mutual exclusion in proc_sctp_do_udp_port()

We must serialize calls to sctp_udp_sock_stop() and sctp_udp_sock_start()

or risk a crash as syzbot reported:

Oops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] SMP KASAN PTI

KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]

CPU: 1 UID: 0 PID: 6551 Comm: syz.1.44 Not tainted 6.14.0-syzkaller-g7f2ff7b62617 #0 PREEMPT(full)

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025

RIP: 0010:kernel_sock_shutdown+0x47/0x70 net/socket.c:3653

Call Trace:

<TASK>

udp_tunnel_sock_release+0x68/0x80 net/ipv4/udp_tunnel_core.c:181

sctp_udp_sock_stop+0x71/0x160 net/sctp/protocol.c:930

proc_sctp_do_udp_port+0x264/0x450 net/sctp/sysctl.c:553

proc_sys_call_handler+0x3d0/0x5b0 fs/proc/proc_sysctl.c:601

iter_file_splice_write+0x91c/0x1150 fs/splice.c:738

do_splice_from fs/splice.c:935 [inline]

direct_splice_actor+0x18f/0x6c0 fs/splice.c:1158

splice_direct_to_actor+0x342/0xa30 fs/splice.c:1102

do_splice_direct_actor fs/splice.c:1201 [inline]

do_splice_direct+0x174/0x240 fs/splice.c:1227

do_sendfile+0xafd/0xe50 fs/read_write.c:1368

__do_sys_sendfile64 fs/read_write.c:1429 [inline]

__se_sys_sendfile64 fs/read_write.c:1415 [inline]

__x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1415

do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2025-22062 is recorded against 2 packages.

  • kernel (from 6.14.0 up to 6.14.2)
  • linux-kernel (from 6.14 up to 6.14.2)

Timeline and source

Published on 16 April 2025 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
lists.debian.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2025-22062 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-04-16
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.14.0 6.14.2
linux-kernel 6.14 6.14.2

References

Similar Threats

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