CVE-2025-22062 [Medium] | Security Vulnerability in Linux Kernel

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]

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-02-10	0.02%	0.11%	+0.09%
2	2025-04-17	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-02-10

0.02%

0.11%

+0.09%

2025-04-17

—

0.02%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2025-22062

vendor	priority	summary	link
`debian`	unimportant	CVE-2025-22062 unimportant priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6.	https://security-tracker.debian.org/tracker/CVE-2025-22062
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-22062
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2025-22062/
`ubuntu`	medium	CVE-2025-22062 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, released 178, ignored 149, not-affected 76, needs-triage 2, needed 1.	https://ubuntu.com/security/CVE-2025-22062

Affected software / configurations for CVE-2025-22062

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 5.11, < 6.12.23	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.13.11	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.14, < 6.14.2	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2025-22062

URL	Tags
https://git.kernel.org/stable/c/10206302af856791fbcc27a33ed3c3eb09b2793d	Patch
https://git.kernel.org/stable/c/386507cb6fb7cdef598ddcb3f0fa37e6ca9e789d
https://git.kernel.org/stable/c/65ccb2793da7401772a3ffe85355c831b313c59f
https://git.kernel.org/stable/c/b3598f53211ba1025485306de2733bdd241311a3
https://git.kernel.org/stable/c/d3d7675d77622f6ca1aae14c51f80027b36283f8	Patch
https://git.kernel.org/stable/c/e5178bfc55b3a78000f0f8298e7ade88783ce581	Patch
https://git.kernel.org/stable/c/efb8cb487be8f4ba6aaef616011d702d6a083ed1	Patch
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html

URL

CVE-2025-22062 | sctp: add mutual exclusion in proc_sctp_do_udp_port()

Exploit prediction scoring system (EPSS) score for CVE-2025-22062

Common vulnerability scoring system (CVSS) metrics for CVE-2025-22062

Weakness enumeration for CVE-2025-22062

OS Trackers for CVE-2025-22062

Affected software / configurations for CVE-2025-22062

References for CVE-2025-22062