CVE-2026-31408Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold
- 8.8HighCVSS base score
- 0.32%Exploitation in 30 daysEPSS · top 74% 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: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold sco_recv_frame() reads conn->sk under sco_conn_lock() but immediately releases the lock without holding a reference to the socket. A concurrent close() can free the socket between the lock release and the subsequent sk->sk_state access, resulting in a use-after-free. Other functions in the same file (sco_sock_timeout(), sco_conn_del()) correctly use sco_sock_hold() to safely hold a reference under the lock. Fix by using sco_sock_hold() to take a reference before releasing the lock, and adding sock_put() on all exit paths.
Timeline
ID reserved
By Linux
- 28 days later
· 28 days later
Published
- 7 months later
· 7 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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.32% · top 74% of all CVEs (15 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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 37e18bc8c9a70d77bd099e2273f328b3bc7f6d0d
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < d57384e27d1ebf0047e3f00a6e1181b8be9857a2
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < b0a7da0e3f7442545f071499beb36374714bb9de
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 45aaca995e4a7a05b272a58e7ab2fff4f611b8f1
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 108b81514d8f2535eb16651495cefb2250528db3
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < e76e8f0581ef555eacc11dbb095e602fb30a5361
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 598dbba9919c5e36c54fe1709b557d64120cb94b
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.203 – ≤ 5.15.*
- unaffected 6.1.168 – ≤ 6.1.*
- unaffected 6.6.131 – ≤ 6.6.*
- unaffected 6.12.80 – ≤ 6.12.*
- unaffected 6.18.21 – ≤ 6.18.*
- unaffected 6.19.11 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References8
- https://git.kernel.org/stable/c/37e18bc8c9a70d77bd099e2273f328b3bc7f6d0d (opens in a new tab)
- https://git.kernel.org/stable/c/d57384e27d1ebf0047e3f00a6e1181b8be9857a2 (opens in a new tab)
- https://git.kernel.org/stable/c/b0a7da0e3f7442545f071499beb36374714bb9de (opens in a new tab)
- https://git.kernel.org/stable/c/45aaca995e4a7a05b272a58e7ab2fff4f611b8f1 (opens in a new tab)
- https://git.kernel.org/stable/c/108b81514d8f2535eb16651495cefb2250528db3 (opens in a new tab)
- https://git.kernel.org/stable/c/7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e (opens in a new tab)
- https://git.kernel.org/stable/c/e76e8f0581ef555eacc11dbb095e602fb30a5361 (opens in a new tab)
- https://git.kernel.org/stable/c/598dbba9919c5e36c54fe1709b557d64120cb94b (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-2026-19196 (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-2026-31408)Record last updated .