CVE-2022-50243 (GCVE-0-2022-50243)
Vulnerability from cvelistv5
Published
2025-09-15 14:01
Modified
2025-09-15 14:01
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/022152aaebe116a25c39818a07e175a8cd3c1e11
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f90099d18e3abdc01babf686f41f63fe04939c1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19d636b663e0e92951bba5fced929ca7fd25c552
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/382ff44716603a54f5fd238ddec6a2468e217612
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f65955340e0044f5c41ac799a01698ac7dee8a4e
Impacted products
Vendor Product Version
Linux Linux Version: 50b57223da67653c61e405d0a7592355cfe4585e
Version: b60461696a0b0fdaf240bc365b7983698f88ded2
Version: 8eb225873246312660ccd68296959a7b213d0cdd
Version: 58acd10092268831e49de279446c314727101292
Version: 58acd10092268831e49de279446c314727101292
Version: 58acd10092268831e49de279446c314727101292
Version: 58acd10092268831e49de279446c314727101292
Version: c1de376423a7759bf4fa25d6a038a4c1e035c9e1
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   Linux Linux Version: 5.14
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: handle the error returned from sctp_auth_asoc_init_active_key\n\nWhen it returns an error from sctp_auth_asoc_init_active_key(), the\nactive_key is actually not updated. The old sh_key will be freeed\nwhile it\u0027s still used as active key in asoc. Then an use-after-free\nwill be triggered when sending patckets, as found by syzbot:\n\n  sctp_auth_shkey_hold+0x22/0xa0 net/sctp/auth.c:112\n  sctp_set_owner_w net/sctp/socket.c:132 [inline]\n  sctp_sendmsg_to_asoc+0xbd5/0x1a20 net/sctp/socket.c:1863\n  sctp_sendmsg+0x1053/0x1d50 net/sctp/socket.c:2025\n  inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819\n  sock_sendmsg_nosec net/socket.c:714 [inline]\n  sock_sendmsg+0xcf/0x120 net/socket.c:734\n\nThis patch is to fix it by not replacing the sh_key when it returns\nerrors from sctp_auth_asoc_init_active_key() in sctp_auth_set_key().\nFor sctp_auth_set_active_key(), old active_key_id will be set back\nto asoc-\u003eactive_key_id when the same thing happens."
        }
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      "providerMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50243",
    "datePublished": "2025-09-15T14:01:52.101Z",
    "dateReserved": "2025-09-15T13:58:00.971Z",
    "dateUpdated": "2025-09-15T14:01:52.101Z",
    "state": "PUBLISHED"
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  }
}


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