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Vulnerability record · CVE-2021-44648 · published 12 January 2022

CVE-2021-44648: Gnome gdkpixbuf out-of-bounds write vulnerability

Gnome · Gdkpixbuf

GNOME gdk-pixbuf 2.42.6 is vulnerable to a heap-buffer overflow vulnerability when decoding the lzw compressed stream of image data in GIF files with lzw minimum code size equals to 12.

8.8 CVSS 3.1 High EPSS 1.9% · top 21.1% CWE-787 · Out-of-bounds write
8.8CVSS 3.1 base score, v2 6.8
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
10References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

GNOME gdk-pixbuf 2.42.6 is vulnerable to a heap-buffer overflow vulnerability when decoding the lzw compressed stream of image data in GIF files with lzw minimum code size equals to 12.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/136 ExploitIssue TrackingThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JEVTOGIJITK2N5AOOLKKMDI
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEKBMOO52RXONWKB6ZKKHTV
https://sahildhar.github.io/blogpost/GdkPixbuf-Heap-Buffer-Overflow-in-lzw_decoder_new/ ExploitThird Party Advisory
https://www.debian.org/security/2022/dsa-5228 Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/136 ExploitIssue TrackingThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JEVTOGIJITK2N5AOOLKKMDI
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEKBMOO52RXONWKB6ZKKHTV
https://sahildhar.github.io/blogpost/GdkPixbuf-Heap-Buffer-Overflow-in-lzw_decoder_new/ ExploitThird Party Advisory
https://www.debian.org/security/2022/dsa-5228 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-44648), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.