CVE-2026-31408

Advisory lineage Upstream: 0 Downstream: 8
Analyzed
Published: 06 Apr 2026, 07:38
Last modified:11 May 2026, 22:08

Vulnerability Summary

Overall Risk (default)
medium
35/100
CVSS Score
8.8 HIGH
v3.1 (cve.org)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 Apr 2026, 07:38
Published
Vulnerability first disclosed
11 May 2026, 22:08
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 4%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • linux•linux

    ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d57384e27d1ebf0047e3f00a6e1181b8be9857a2 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b0a7da0e3f7442545f071499beb36374714bb9de | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 45aaca995e4a7a05b272a58e7ab2fff4f611b8f1 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 108b81514d8f2535eb16651495cefb2250528db3 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e76e8f0581ef555eacc11dbb095e602fb30a5361 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 598dbba9919c5e36c54fe1709b557d64120cb94b | 2.6.12

  • linux•linux_kernel

    ≥ 2.6.12.1, < 5.15.203 | ≥ 5.16, < 6.1.168 | ≥ 6.2, < 6.6.131 | ≥ 6.7, < 6.12.80 | ≥ 6.13, < 6.18.21 | ≥ 6.19, < 6.19.11 | 2.6.12 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5

References (7)