[SRU][J/N/Q][PATCH 0/1] CVE-2026-23060

[Ian Whitfield]

[Impact]

crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec

authencesn assumes an ESP/ESN-formatted AAD. When assoclen is shorter than
the minimum expected length, crypto_authenc_esn_decrypt() can advance past
the end of the destination scatterlist and trigger a NULL pointer dereference
in scatterwalk_map_and_copy(), leading to a kernel panic (DoS).

Add a minimum AAD length check to fail fast on invalid inputs.

[Backport]

The patch was applied cleanly.

[Fix]

Questing: Cherry-pick
Noble: Cherry-pick
Jammy: Cherry-pick
Focal: PR on Forgejo
Bionic: Sent to ESM ML
Xenial: Sent to ESM ML
Trusty: not affected

[Test Case]

Compile and boot tested.

[Where problems could occur]

This fix affects those who use the Authenc crypto module, which is required for
the IPsec ESP protocol. An issue with this fix would be visible to the user via
a kernel panic or failure to complete network transactions.

Taeyang Lee (1):
  crypto: authencesn - reject too-short AAD (assoclen<8) to match
    ESP/ESN spec

 crypto/authencesn.c | 6 ++++++
 1 file changed, 6 insertions(+)

-- 
2.43.0