CVE-2022-50243
sctp: handle the error returned from sctp_auth_asoc_init_active_key
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 50b57223da67653c61e405d0a7592355cfe4585e – < b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40
- affected b60461696a0b0fdaf240bc365b7983698f88ded2 – < 382ff44716603a54f5fd238ddec6a2468e217612
- affected 8eb225873246312660ccd68296959a7b213d0cdd – < f65955340e0044f5c41ac799a01698ac7dee8a4e
- affected 58acd10092268831e49de279446c314727101292 – < 19d636b663e0e92951bba5fced929ca7fd25c552
- affected 58acd10092268831e49de279446c314727101292 – < 0f90099d18e3abdc01babf686f41f63fe04939c1
- affected 58acd10092268831e49de279446c314727101292 – < 3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d
- affected 58acd10092268831e49de279446c314727101292 – < 022152aaebe116a25c39818a07e175a8cd3c1e11
- affected c1de376423a7759bf4fa25d6a038a4c1e035c9e1
- affected 4.19.199 – < 4.19.262
- affected 5.4.136 – < 5.4.220
- affected 5.10.54 – < 5.10.150
- affected 5.13.6 – < 5.14
- affected 5.14
- unaffected < 5.14
- unaffected 4.19.262 – ≤ 4.19.*
- unaffected 5.4.220 – ≤ 5.4.*
- unaffected 5.10.150 – ≤ 5.10.*
- unaffected 5.15.75 – ≤ 5.15.*
- unaffected 5.19.17 – ≤ 5.19.*
- unaffected 6.0.3 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (7)
- https://git.kernel.org/stable/c/b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40 (opens in a new tab)
- https://git.kernel.org/stable/c/382ff44716603a54f5fd238ddec6a2468e217612 (opens in a new tab)
- https://git.kernel.org/stable/c/f65955340e0044f5c41ac799a01698ac7dee8a4e (opens in a new tab)
- https://git.kernel.org/stable/c/19d636b663e0e92951bba5fced929ca7fd25c552 (opens in a new tab)
- https://git.kernel.org/stable/c/0f90099d18e3abdc01babf686f41f63fe04939c1 (opens in a new tab)
- https://git.kernel.org/stable/c/3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d (opens in a new tab)
- https://git.kernel.org/stable/c/022152aaebe116a25c39818a07e175a8cd3c1e11 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50243)Record last updated .