DEBIAN-CVE-2026-40492

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Source

https://security-tracker.debian.org/tracker/CVE-2026-40492

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40492.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-40492

Upstream

CVE-2026-40492

Published

2026-04-18T03:16:13Z

Modified

2026-09-14T17:03:10Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

SAIL is a cross-platform library for loading and saving images with support for animation, metadata, and ICC profiles. Prior to commit 36aa5c7ec8a2bb35f6fb867a1177a6f141156b02, the XWD codec resolves pixel format based on pixmap_depth but the byte-swap code uses bits_per_pixel independently. When pixmap_depth=8 (BPP8_INDEXED, 1 byte/pixel buffer) but bits_per_pixel=32, the byte-swap loop accesses memory as uint32_t*, reading/writing 4x the allocated buffer size. This is a different vulnerability from the previously reported GHSA-3g38-x2pj-mv55 (CVE-2026-27168), which addressed bytes_per_line validation. Commit 36aa5c7ec8a2bb35f6fb867a1177a6f141156b02 contains a patch.

References

https://security-tracker.debian.org/tracker/CVE-2026-40492

Affected packages

Debian:13 / sail

Package

Name: sail
Purl: pkg:deb/debian/sail?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.8-1

0.9.8-1+deb13u1

0.9.9-1

0.9.10-1

0.9.10-2

0.9.10-3

1.*

1.2.0-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40492.json"

Debian:14 / sail