CVE-2024-26800

Advisory lineage Upstream: 0 Downstream: 25
Analyzed
Published: 04 Apr 2024, 08:20
Last modified:23 May 2026, 15:38

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.03% LOW
0% probability +0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Apr 2024, 08:20
Published
Vulnerability first disclosed
23 May 2026, 15:38
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: tls: fix use-after-free on failed backlog decryption When the decrypt request goes to the backlog and crypto_aead_decrypt returns -EBUSY, tls_do_decryption will wait until all async decryptions have completed. If one of them fails, tls_do_decryption will return -EBADMSG and tls_decrypt_sg jumps to the error path, releasing all the pages. But the pages have been passed to the async callback, and have already been released by tls_decrypt_done. The only true async case is when crypto_aead_decrypt returns -EINPROGRESS. With -EBUSY, we already waited so we can tell tls_sw_recvmsg that the data is available for immediate copy, but we need to notify tls_decrypt_sg (via the new ->async_done flag) that the memory has already been released.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.03%• Percentile: 10%

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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

    ≥ cd1bbca03f3c1d845ce274c0d0a66de8e5929f72, < f2b85a4cc763841843de693bbd7308fe9a2c4c89 | ≥ 13eca403876bbea3716e82cdfe6f1e6febb38754, < 81be85353b0f5a7b660635634b655329b429eefe | ≥ ab6397f072e5097f267abf5cb08a8004e6b17694, < 1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1 | ≥ 8590541473188741055d27b955db0777569438e3, < 13114dc5543069f7b97991e3b79937b6da05f5b0 | 3ade391adc584f17b5570fd205de3ad029090368 | ≥ 5.15.160, < 5.16 | ≥ 6.6.18, < 6.6.21 | ≥ 6.7.6, < 6.7.9

  • linux•linux_kernel

    ≥ 5.15.160, < 5.16 | ≥ 6.6.18, < 6.6.21 | ≥ 6.7.6, < 6.7.9 | 6.8:rc1 | 6.8:rc2 | 6.8:rc3 | 6.8:rc4 | 6.8:rc5 | 6.8:rc6

References (4)