CVE-2024-26584

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: tls: handle backlogging of crypto requests

Since we're setting the CRYPTO_TFM_REQ_MAY_BACKLOG flag on our requests to the crypto API, crypto_aead_{encrypt,decrypt} can return -EBUSY instead of -EINPROGRESS in valid situations. For example, when the cryptd queue for AESNI is full (easy to trigger with an artificially low cryptd.cryptd_max_cpu_qlen), requests will be enqueued to the backlog but still processed. In that case, the async callback will also be called twice: first with err == -EINPROGRESS, which it seems we can just ignore, then with err == 0.

Compared to Sabrina's original patch this version uses the new tls_*crypt_async_wait() helpers and converts the EBUSY to EINPROGRESS to avoid having to modify all the error handling paths. The handling is identical.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa54667f6728c2714a400f3c884727da74b6d1717 < 3ade391adc584f17b5570fd205de3ad029090368affected
LinuxLinuxa54667f6728c2714a400f3c884727da74b6d1717 < cd1bbca03f3c1d845ce274c0d0a66de8e5929f72affected
LinuxLinuxa54667f6728c2714a400f3c884727da74b6d1717 < 13eca403876bbea3716e82cdfe6f1e6febb38754affected
LinuxLinuxa54667f6728c2714a400f3c884727da74b6d1717 < ab6397f072e5097f267abf5cb08a8004e6b17694affected
LinuxLinuxa54667f6728c2714a400f3c884727da74b6d1717 < 8590541473188741055d27b955db0777569438e3affected
LinuxLinux4.16affected
LinuxLinux0 < 4.16unaffected
LinuxLinux5.15.160 <= 5.15.*unaffected
LinuxLinux6.1.84 <= 6.1.*unaffected
LinuxLinux6.6.18 <= 6.6.*unaffected
LinuxLinux6.7.6 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References