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Review reviewHigh

CVE-2024-26800

Linux Linux, linux kernel

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 -EB...

CVSS
7.8
EPSS
0.74%
51.1% percentile
CISA KEV
Not listed
Published
2024.04.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.74%
Technical severityCVSS 7.8

Vulnerability overview

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 -EB...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 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, 6.8
Fixed versions
5.16, 6.6.21, 6.7.9

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416