CVE-2026-23060
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
A vulnerability in the Linux kernel's authencesn crypto module allows a kernel panic (DoS) via a too-short AAD (assoclen<8). Missing validation of the authentication data length leads to an out-of-bounds read on the destination scatterlist and a NULL pointer dereference.
Risk Assessment
An attacker can remotely crash the system (kernel panic) by sending a crafted IPsec packet with an invalid AAD field, resulting in denial of service (DoS).
Recommendation
Immediately update the Linux kernel to a version containing the fix (commit adding minimum AAD length check).
Original NVD description (English source)
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.