CVE-2022-50243

Advisory lineage Upstream: 0 Downstream: 5
Analyzed
Published: 15 Sept 2025, 14:01
Last modified:23 May 2026, 15:23

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

15 Sept 2025, 14:01
Published
Vulnerability first disclosed
23 May 2026, 15:23
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: handle the error returned from sctp_auth_asoc_init_active_key When it returns an error from sctp_auth_asoc_init_active_key(), the active_key is actually not updated. The old sh_key will be freeed while it's still used as active key in asoc. Then an use-after-free will be triggered when sending patckets, as found by syzbot: sctp_auth_shkey_hold+0x22/0xa0 net/sctp/auth.c:112 sctp_set_owner_w net/sctp/socket.c:132 [inline] sctp_sendmsg_to_asoc+0xbd5/0x1a20 net/sctp/socket.c:1863 sctp_sendmsg+0x1053/0x1d50 net/sctp/socket.c:2025 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 This patch is to fix it by not replacing the sh_key when it returns errors from sctp_auth_asoc_init_active_key() in sctp_auth_set_key(). For sctp_auth_set_active_key(), old active_key_id will be set back to asoc->active_key_id when the same thing happens.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 6%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • linux•linux

    ≥ 50b57223da67653c61e405d0a7592355cfe4585e, < b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40 | ≥ b60461696a0b0fdaf240bc365b7983698f88ded2, < 382ff44716603a54f5fd238ddec6a2468e217612 | ≥ 8eb225873246312660ccd68296959a7b213d0cdd, < f65955340e0044f5c41ac799a01698ac7dee8a4e | ≥ 58acd10092268831e49de279446c314727101292, < 19d636b663e0e92951bba5fced929ca7fd25c552 | ≥ 58acd10092268831e49de279446c314727101292, < 0f90099d18e3abdc01babf686f41f63fe04939c1 | ≥ 58acd10092268831e49de279446c314727101292, < 3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d | ≥ 58acd10092268831e49de279446c314727101292, < 022152aaebe116a25c39818a07e175a8cd3c1e11 | c1de376423a7759bf4fa25d6a038a4c1e035c9e1 | ≥ 4.19.199, < 4.19.262 | ≥ 5.4.136, < 5.4.220 | ≥ 5.10.54, < 5.10.150 | ≥ 5.13.6, < 5.14 | 5.14

  • linux•linux_kernel

    ≥ 4.19.199, < 4.19.262 | ≥ 5.4.136, < 5.4.220 | ≥ 5.10.54, < 5.10.150 | ≥ 5.13.6, < 5.14 | ≥ 5.14.1, < 5.15.75 | ≥ 5.16, < 5.19.17 | ≥ 6.0, < 6.0.3 | 5.14 | 5.14:rc3 | 5.14:rc4 | 5.14:rc5 | 5.14:rc6 | 5.14:rc7

References (7)