CVE-2026-74490tipc: avoid use-after-free in poll trace queue dumps
- 8.8HighCVSS base score
- 0.46%Exploitation in 30 daysEPSS · top 60% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.46% · top 60% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected b4b9771bcbbd5839b0f77aba55e2f85989ed6779 – < 3cd57c6b210d50fd1f7ac1720442ba5be5dc94f8
- affected b4b9771bcbbd5839b0f77aba55e2f85989ed6779 – < ae7fc824970888b4fdaa076819c9a6f2fcede275
- affected b4b9771bcbbd5839b0f77aba55e2f85989ed6779 – < 78706367fe1b98aee0a6de27c62b7f1e3035f38d
- affected b4b9771bcbbd5839b0f77aba55e2f85989ed6779 – < d7940bb6a8e7ab28f972c2875cb05783216312dc
- affected b4b9771bcbbd5839b0f77aba55e2f85989ed6779 – < 5e82beba4bc1f91d0e64c9c43f2b2fa9cd1c2a7d
- affected b4b9771bcbbd5839b0f77aba55e2f85989ed6779 – < bed792737b5f1ba773054dbe984502958bdfe6ce
- affected b4b9771bcbbd5839b0f77aba55e2f85989ed6779 – < ac2f787980fdf4364cd5651a4c8128e59b8de3aa
- affected b4b9771bcbbd5839b0f77aba55e2f85989ed6779 – < b4f1719dfea023220e0e6bd892b087d76b2a6a49
- affected 5.0
- unaffected < 5.0
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.151 – ≤ 6.6.*
- unaffected 6.12.103 – ≤ 6.12.*
- unaffected 6.18.44 – ≤ 6.18.*
- unaffected 7.1.8 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/3cd57c6b210d50fd1f7ac1720442ba5be5dc94f8 (opens in a new tab)
- https://git.kernel.org/stable/c/ae7fc824970888b4fdaa076819c9a6f2fcede275 (opens in a new tab)
- https://git.kernel.org/stable/c/78706367fe1b98aee0a6de27c62b7f1e3035f38d (opens in a new tab)
- https://git.kernel.org/stable/c/d7940bb6a8e7ab28f972c2875cb05783216312dc (opens in a new tab)
- https://git.kernel.org/stable/c/5e82beba4bc1f91d0e64c9c43f2b2fa9cd1c2a7d (opens in a new tab)
- https://git.kernel.org/stable/c/bed792737b5f1ba773054dbe984502958bdfe6ce (opens in a new tab)
- https://git.kernel.org/stable/c/ac2f787980fdf4364cd5651a4c8128e59b8de3aa (opens in a new tab)
- https://git.kernel.org/stable/c/b4f1719dfea023220e0e6bd892b087d76b2a6a49 (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)
- EUVD EUVD-2026-59683 (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://cveledger.app/cve/CVE-2026-74490)Record last updated .