{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-50243", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-15T13:58:00.971Z", "datePublished": "2025-09-15T14:01:52.101Z", "dateUpdated": "2025-09-15T14:01:52.101Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-15T14:01:52.101Z"}, "descriptions": [{"lang": "en", "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's 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->active_key_id when the same thing happens."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sctp/auth.c"], "versions": [{"version": "50b57223da67653c61e405d0a7592355cfe4585e", "lessThan": 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"https://git.kernel.org/stable/c/022152aaebe116a25c39818a07e175a8cd3c1e11"}], "title": "sctp: handle the error returned from sctp_auth_asoc_init_active_key", "x_generator": {"engine": "bippy-1.2.0"}}}}

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The old sh_key will be freeed\nwhile it's 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->active_key_id when the same thing happens."}], "id": "CVE-2022-50243", "lastModified": "2025-11-24T20:04:28.100", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-09-15T14:15:34.620", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/022152aaebe116a25c39818a07e175a8cd3c1e11"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0f90099d18e3abdc01babf686f41f63fe04939c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/19d636b663e0e92951bba5fced929ca7fd25c552"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/382ff44716603a54f5fd238ddec6a2468e217612"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f65955340e0044f5c41ac799a01698ac7dee8a4e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "sctp: handle the error returned from sctp_auth_asoc_init_active_key", "id": "2395428", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395428"}, "csaw": false, "details": ["No description is available for this CVE."], "name": "CVE-2022-50243", "public_date": "2025-09-15T14:01:52Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50243\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50243\nhttps://git.kernel.org/stable/c/022152aaebe116a25c39818a07e175a8cd3c1e11\nhttps://git.kernel.org/stable/c/0f90099d18e3abdc01babf686f41f63fe04939c1\nhttps://git.kernel.org/stable/c/19d636b663e0e92951bba5fced929ca7fd25c552\nhttps://git.kernel.org/stable/c/382ff44716603a54f5fd238ddec6a2468e217612\nhttps://git.kernel.org/stable/c/3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d\nhttps://git.kernel.org/stable/c/b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40\nhttps://git.kernel.org/stable/c/f65955340e0044f5c41ac799a01698ac7dee8a4e"]}