CVE-2026-46033
kernel: crypto: authencesn - reject short ahash digests during instance creation
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 27, 2026
Updated · August 20, 2026
Description
A flaw was found in the Linux kernel's authencesn cryptographic module. This vulnerability arises from insufficient validation of cryptographic digest sizes during the creation of new instances. A local attacker could exploit this by providing a malformed input, leading to an out-of-bounds memory access. This could cause system instability, a denial of service (DoS), or potentially enable unauthorized access to sensitive information or system control.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
CVSS / CWE
CVSS 3.1 · 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-1284 · Improper Validation of Specified Quantity in Input