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In the Linux kernel, the following vulnerability has been resolved: 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.
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This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:19074 https://access.redhat.com/errata/RHSA-2026:19074
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:19225 https://access.redhat.com/errata/RHSA-2026:19225