Amazon Linux 2023 Security Advisory: ALAS2023-2026-3132
Advisory Released Date: 2026-09-29
Advisory Updated Date: 2026-09-29
Severity:
Low
Issue Overview:
RustCrypto CMOV provides conditional move CPU intrinsics which are guaranteed on major platforms to execute in constant-time and not be rewritten as branches by the compiler. From 0.1.1 until 0.5.4, the aarch64 implementations of Cmov and CmovEq in cmov/src/backends/aarch64.rs assume high bits are zero-extended when loading values smaller than a register, so set high bits such as [8..] in a Cmov selector or [16..] of self or other in the u16 and i16 CmovEq implementations can cause left.cmovz(&right, condition) to produce incorrect output. This issue is fixed in version 0.5.4. (CVE-2026-50185)
Affected Packages:
amazon-efs-utils
Issue Correction:
Run dnf update amazon-efs-utils --releasever 2023.12.20260928 or dnf update --advisory ALAS2023-2026-3132 --releasever 2023.12.20260928 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
amazon-efs-utils-3.3.2-1.amzn2023.aarch64
src:
amazon-efs-utils-3.3.2-1.amzn2023.src
x86_64:
amazon-efs-utils-3.3.2-1.amzn2023.x86_64