Out-of-bounds Read Affecting libsoup-lang package, versions <3.0.4-150400.3.52.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.24% (14th percentile)

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  • Snyk IDSNYK-SLES155-LIBSOUPLANG-20570596
  • published8 Oct 2026
  • disclosed7 Oct 2026

Introduced: 7 Oct 2026

NewCVE-2026-12478  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 libsoup-lang to version 3.0.4-150400.3.52.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup-lang package and not the libsoup-lang package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-based client when max_incoming_payload_size is set to 0.

CVSS Base Scores

version 3.1