CVE-2026-74490High· 8.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: tipc: avoid use-after-free in poll trace queue dumps TIPC socket tracepoints dump queue state through tipc_sk_dump(). Most queue-dump callsites already serialize that …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.5%
In the Linux kernel, the following vulnerability has been resolved:
tipc: avoid use-after-free in poll trace queue dumps
TIPC socket tracepoints dump queue state through tipc_sk_dump(). Most queue-dump callsites already serialize that walk under the socket lock or sk->sk_lock.slock, but tipc_poll() calls trace_tipc_sk_poll(..., TIPC_DUMP_ALL, ...) without holding either lock.
That lets the poll trace path reach tipc_list_dump() and backlog head/tail dumping while another context dequeues and frees an skb, leaving the trace helper dereferencing a stale queue entry.
Stop the unlocked poll trace site from requesting queue dumps. Other queue dump trace callsites keep their existing output under the locking they already provide, while poll still emits the event itself without walking live queue members from an unlocked context.
Linux >= b4b9771bcbbd5839b0f77aba55e2f85989ed6779 < 3cd57c6b210d50fd1f7ac1720442ba5be5dc94f8Linux >= b4b9771bcbbd5839b0f77aba55e2f85989ed6779 < ae7fc824970888b4fdaa076819c9a6f2fcede275Linux >= b4b9771bcbbd5839b0f77aba55e2f85989ed6779 < 78706367fe1b98aee0a6de27c62b7f1e3035f38dLinux >= b4b9771bcbbd5839b0f77aba55e2f85989ed6779 < d7940bb6a8e7ab28f972c2875cb05783216312dcLinux >= b4b9771bcbbd5839b0f77aba55e2f85989ed6779 < 5e82beba4bc1f91d0e64c9c43f2b2fa9cd1c2a7dLinux >= b4b9771bcbbd5839b0f77aba55e2f85989ed6779 < bed792737b5f1ba773054dbe984502958bdfe6ceLinux >= b4b9771bcbbd5839b0f77aba55e2f85989ed6779 < ac2f787980fdf4364cd5651a4c8128e59b8de3aaLinux >= b4b9771bcbbd5839b0f77aba55e2f85989ed6779 < b4f1719dfea023220e0e6bd892b087d76b2a6a49Linux 5.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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