Out-of-bounds Read Affecting swtpm package, versions <0.9.0-150700.3.3.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-SLES157-SWTPM-20261502
  • published29 Sept 2026
  • disclosed28 Sept 2026

Introduced: 28 Sep 2026

NewCVE-2026-75900  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 swtpm to version 0.9.0-150700.3.3.1 or higher.

NVD Description

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

An out-of-bounds read vulnerability was found in swtpm's SWTPM_NVRAM_CheckHeader() function. The entry guard checks the buffer length against sizeof(bh), where bh is a pointer, instead of sizeof(*bh), the actual struct size. This allows an undersized buffer to pass validation, causing a 2-byte heap overread on 64-bit systems (6 bytes on 32-bit) when accessing the totlen field. This may cause daemon termination on some platforms and leaks heap data to the log.

CVSS Base Scores

version 3.1