CVE-2024-26800

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxcd1bbca03f3c1d845ce274c0d0a66de8e5929f72 < f2b85a4cc763841843de693bbd7308fe9a2c4c89affected
LinuxLinux13eca403876bbea3716e82cdfe6f1e6febb38754 < 81be85353b0f5a7b660635634b655329b429eefeaffected
LinuxLinuxab6397f072e5097f267abf5cb08a8004e6b17694 < 1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1affected
LinuxLinux8590541473188741055d27b955db0777569438e3 < 13114dc5543069f7b97991e3b79937b6da05f5b0affected
LinuxLinux3ade391adc584f17b5570fd205de3ad029090368affected
LinuxLinux5.15.160 < 5.16affected
LinuxLinux6.6.18 < 6.6.21affected
LinuxLinux6.7.6 < 6.7.9affected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References