8.2

CVE-2026-26740: giflib_project giflib Out-of-bounds Write

CVSS: 8.2v3.1HighModified
AliasesALPINE-CVE-2026-26740MGASA-2026-0295SUSE-SU-2026:22382-1
Published 18-03-2026Last modified 23-07-2026
Open JSON

Vulnerability summary

CVE-2026-26740 is a high (CVSS 8.2) Out-of-bounds Write vulnerability in giflib_project giflib. EPSS estimates a 1.07% chance of exploitation in the next 30 days, higher than 64.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
43/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.2/10
010
High · v3.1 (CVE.org)
EPSS score
1.07%
0%100%
Low · +0.45 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 5 · Related 1
RHSA-2026:9683RHSA-2026:9686RHSA-2026:9689RHSA-2026:9693USN-8583-1

Timeline

  1. 18-03-2026
    PublishedVulnerability first disclosed.
  2. 23-07-2026
    Last modifiedVulnerability information updated.

Description

Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwriting an existing Graphic Control Extension block without validating its allocated size.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

1.07%

Chance of exploitation in the next 30 days

Percentile

64%

Versus all other CVEs

30-day change

+0.45 pp

From 0.62% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.07%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Poc

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Suse15 products
  • giflib&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS< 5.2.2-150000.4.22.1
  • giflib&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS< 5.2.2-150000.4.22.1
  • giflib&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS< 5.2.2-150000.4.22.1
  • giflib&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS< 5.2.2-150000.4.22.1
  • giflib&distro=SUSE Linux Enterprise Module for Basesystem 15 SP7< 5.2.2-150000.4.22.1
Redhat5 products
  • giflib< 0:5.2.1-22.el10_0.2 | < 0:5.1.4-3.el8_4.2 | < 0:5.2.1-9.el9_6.2 | < 0:5.2.1-9.el9_4.2 | < 0:5.1.4-3.el8_6.2 | < 0:5.1.4-3.el8_8.2 | < 0:5.2.1-10.el9_8.2 | < 0:5.2.1-25.el10_2 | < 0:5.1.4-5.el8_10 | < 0:5.2.1-9.el9_2.2
  • giflib-debuginfo< 0:5.2.1-22.el10_0.2 | < 0:5.1.4-3.el8_4.2 | < 0:5.2.1-9.el9_6.2 | < 0:5.2.1-9.el9_4.2 | < 0:5.1.4-3.el8_6.2 | < 0:5.1.4-3.el8_8.2 | < 0:5.2.1-10.el9_8.2 | < 0:5.2.1-25.el10_2 | < 0:5.1.4-5.el8_10 | < 0:5.2.1-9.el9_2.2
  • giflib-debugsource< 0:5.2.1-22.el10_0.2 | < 0:5.1.4-3.el8_4.2 | < 0:5.2.1-9.el9_6.2 | < 0:5.2.1-9.el9_4.2 | < 0:5.1.4-3.el8_6.2 | < 0:5.1.4-3.el8_8.2 | < 0:5.2.1-10.el9_8.2 | < 0:5.2.1-25.el10_2 | < 0:5.1.4-5.el8_10 | < 0:5.2.1-9.el9_2.2
  • giflib-devel< 0:5.2.1-22.el10_0.2 | < 0:5.2.1-9.el9_6.2 | < 0:5.2.1-10.el9_8.2 | < 0:5.2.1-25.el10_2 | < 0:5.1.4-5.el8_10
  • giflib-utils-debuginfo< 0:5.2.1-22.el10_0.2 | < 0:5.1.4-3.el8_4.2 | < 0:5.2.1-9.el9_6.2 | < 0:5.2.1-9.el9_4.2 | < 0:5.1.4-3.el8_6.2 | < 0:5.1.4-3.el8_8.2 | < 0:5.2.1-10.el9_8.2 | < 0:5.2.1-25.el10_2 | < 0:5.1.4-5.el8_10 | < 0:5.2.1-9.el9_2.2
Mageia2 products
  • giflib< 5.2.2-4.1.mga10
  • giflib< 5.2.1-7.4.mga9
Opensuse2 products
  • giflib&distro=openSUSE Leap 16.0< 5.2.2-160000.4.1
  • giflib&distro=openSUSE Tumbleweed< 5.2.2-4.1
Alpine1 product
  • giflib< 5.2.2-r2
Debian1 product
  • giflib< 5.2.1-2.5+deb12u1 | < 5.2.2-1+deb13u1 | < 6.1.3-1
Giflib_project1 product
Ubuntu1 product
  • giflibAll versions (No fix recorded) | < 5.1.9-2ubuntu0.3 | < 5.2.2-1ubuntu1.2 | < 5.2.2-1ubuntu3.2

8 vendors · 28 products

References

47 links
Show all 47 references