Integer Overflow or Wraparound Affecting libsam4 package, versions <2.4.6-150300.12.19.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.19% (8th percentile)

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  • Snyk IDSNYK-SLES157-LIBSAM4-19883510
  • published17 Sept 2026
  • disclosed16 Sept 2026

Introduced: 16 Sep 2026

CVE-2026-81666  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 libsam4 to version 2.4.6-150300.12.19.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsam4 package and not the libsam4 package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

An integer overflow was found in Corosync's handling of membership commit token messages. The length-validation check for these messages can be bypassed on 32-bit systems due to an integer overflow in the calculation of the expected message length, allowing a crafted network packet to trigger an out-of-bounds memory access that crashes the Corosync daemon. This results in a denial of service for the affected cluster node. The overflow does not occur on 64-bit systems, where the length calculation is correctly performed in 64-bit arithmetic.

CVSS Base Scores

version 3.1