CVE catalog

CVE-2021-45340

libsixel: CVE-2021-45340

Severity: Medium
Published: Jan 25, 2022, 12:15:07 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.92% · Oct 25, 2026

In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libstb	sid	`0.0~git20250907.fede005+ds-1`	vulnerable
Debian	libstb	forky	`0.0~git20250907.fede005+ds-1`	vulnerable
Debian	libstb	trixie	`0.0~git20241109.5c20573+ds-1`	vulnerable
Debian	libstb	bookworm	`0.0~git20220908.8b5f1f3+ds-1`	vulnerable
Debian	libsixel	sid	`1:1.8.7-r2-1`	fixed
Debian	libsixel	forky	`1:1.8.7-r2-1`	fixed
Debian	libsixel	trixie	`1.10.5-1`	fixed
Debian	libsixel	bookworm	`1.10.3-3`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libstb	source	sid	`(unfixed)`	not yet assigned	Not reported	[1124956]
Debian	libstb	source	forky	`(unfixed)`	not yet assigned	Not reported	[1124956]
Debian	libstb	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1124956]
Debian	libstb	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1124956]
Debian	libsixel	source	sid	`1.10.5-1`	not yet assigned	Not reported	[1004377]
Debian	libsixel	source	forky	`1.10.5-1`	not yet assigned	Not reported	[1004377]
Debian	libsixel	source	trixie	`1.10.5-1`	not yet assigned	Not reported	[1004377]
Debian	libsixel	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1004377]

[Debian bug #1124956][Debian bug #1004377]

Notes

[trixie] libstb: Minor issue [bookworm] libstb: Minor issue [bookworm] libsixel: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libsixel1]Affected
Source package: [libsixel]
Details (2)
- 1.10.3-3 · amd64 · bookworm
  Affected
  dsa · libsixel · debian · bookworm; dsa · libsixel · debian · 12
- 1.10.3-3 · arm64 · bookworm
  Affected
  dsa · libsixel · debian · bookworm; dsa · libsixel · debian · 12
[libsixel-bin]Affected
Source package: [libsixel]
Details (2)
- 1.10.3-3 · amd64 · bookworm
  Affected
  dsa · libsixel · debian · bookworm; dsa · libsixel · debian · 12
- 1.10.3-3 · arm64 · bookworm
  Affected
  dsa · libsixel · debian · bookworm; dsa · libsixel · debian · 12
[libsixel-dev]Affected
Source package: [libsixel]
Details (2)
- 1.10.3-3 · amd64 · bookworm
  Affected
  dsa · libsixel · debian · bookworm; dsa · libsixel · debian · 12
- 1.10.3-3 · arm64 · bookworm
  Affected
  dsa · libsixel · debian · bookworm; dsa · libsixel · debian · 12
[libsixel-examples]Affected
Source package: [libsixel]
Details (2)
- 1.10.3-3 · all · bookworm
  Affected
  dsa · libsixel · debian · bookworm; dsa · libsixel · debian · 12
- 1.10.3-3 · all · bookworm
  Affected
  dsa · libsixel · debian · bookworm; dsa · libsixel · debian · 12
[libstb0]Affected
Source package: [libstb]
Details (2)
- 0.0~git20220908.8b5f1f3+ds-1 · amd64 · bookworm
  Affected
  dsa · libstb · debian · bookworm; dsa · libstb · debian · 12
- 0.0~git20220908.8b5f1f3+ds-1 · arm64 · bookworm
  Affected
  dsa · libstb · debian · bookworm; dsa · libstb · debian · 12
[libstb-dev]Affected
Source package: [libstb]
Details (2)
- 0.0~git20220908.8b5f1f3+ds-1 · amd64 · bookworm
  Affected
  dsa · libstb · debian · bookworm; dsa · libstb · debian · 12
- 0.0~git20220908.8b5f1f3+ds-1 · arm64 · bookworm
  Affected
  dsa · libstb · debian · bookworm; dsa · libstb · debian · 12

[Debian 13 (Trixie)]

[libstb0t64]Affected
Source package: [libstb]
Details (2)
- 0.0~git20241109.5c20573+ds-1 · amd64 · trixie
  Affected
  dsa · libstb · debian · 13
- 0.0~git20241109.5c20573+ds-1 · arm64 · trixie
  Affected
  dsa · libstb · debian · 13
[libstb-dev]Affected
Source package: [libstb]
Details (2)
- 0.0~git20241109.5c20573+ds-1 · amd64 · trixie
  Affected
  dsa · libstb · debian · 13
- 0.0~git20241109.5c20573+ds-1 · arm64 · trixie
  Affected
  dsa · libstb · debian · 13
[libsixel1]Fixed
Source package: [libsixel]
Details (2)
- 1.10.5-1 · amd64 · trixie
  Fixed · Fixed: 1.10.5-1
  dsa · libsixel · debian · 13
- 1.10.5-1 · arm64 · trixie
  Fixed · Fixed: 1.10.5-1
  dsa · libsixel · debian · 13
[libsixel-bin]Fixed
Source package: [libsixel]
Details (2)
- 1.10.5-1 · amd64 · trixie
  Fixed · Fixed: 1.10.5-1
  dsa · libsixel · debian · 13
- 1.10.5-1 · arm64 · trixie
  Fixed · Fixed: 1.10.5-1
  dsa · libsixel · debian · 13
[libsixel-dev]Fixed
Source package: [libsixel]
Details (2)
- 1.10.5-1 · amd64 · trixie
  Fixed · Fixed: 1.10.5-1
  dsa · libsixel · debian · 13
- 1.10.5-1 · arm64 · trixie
  Fixed · Fixed: 1.10.5-1
  dsa · libsixel · debian · 13
[libsixel-examples]Fixed
Source package: [libsixel]
Details (2)
- 1.10.5-1 · all · trixie
  Fixed · Fixed: 1.10.5-1
  dsa · libsixel · debian · 13
- 1.10.5-1 · all · trixie
  Fixed · Fixed: 1.10.5-1
  dsa · libsixel · debian · 13

Observed: Oct 23, 2026, 6:03:53 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]