CVE-2026-52917
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: sctp: diag: reject stale associations in dump_one path The SCTP exact sock_diag lookup can hold a transport reference, block on lock_sock(sk), and then resume after sctp_association_free() has marked the association dead and freed its bind address list. When that happens, inet_assoc_attr_size() and inet_diag_msg_sctpasoc_fill() can still dereference association state that is no longer valid for reporting. In particular, inet_diag_msg_sctpasoc_fill() may read an empty bind-address list as a real sctp_sockaddr_entry and trigger an out-of-bounds read from unrelated association memory. Reject the association after taking the socket lock if it has been reaped or detached from the endpoint, and report the lookup as stale. This keeps the exact dump-one path from formatting torn association state.
Severity
HIGH
CVSS score
7.1
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-06-24 08:16:21.587000
Last modified
2026-10-19 20:18:46.330000
View original CVE JSON
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-06-24T08:16:21.587",
"lastModified": "2026-10-19T20:18:46.330",
"vulnStatus": "Modified",
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: diag: reject stale associations in dump_one path\n\nThe SCTP exact sock_diag lookup can hold a transport reference, block on\nlock_sock(sk), and then resume after sctp_association_free() has marked\nthe association dead and freed its bind address list.\n\nWhen that happens, inet_assoc_attr_size() and\ninet_diag_msg_sctpasoc_fill() can still dereference association state\nthat is no longer valid for reporting. In particular,\ninet_diag_msg_sctpasoc_fill() may read an empty bind-address list as a\nreal sctp_sockaddr_entry and trigger an out-of-bounds read from\nunrelated association memory.\n\nReject the association after taking the socket lock if it has been\nreaped or detached from the endpoint, and report the lookup as stale.\nThis keeps the exact dump-one path from formatting torn association\nstate."
}
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