CVE-2026-26740: Buffer Overflow
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/giflibto a version that resolves this vulnerability.Fixed in 5.1.9-2+deb11u1Fixed in 5.2.1-2.5+deb12u1Fixed in 5.2.2-1+deb13u1Fixed in 6.1.3-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-26740?
CVE-2026-26740 has a high severity rating due to its potential to allow a remote attacker to cause a denial of service.
How do I fix CVE-2026-26740?
To fix CVE-2026-26740, update to the latest version of giflib that addresses this buffer overflow vulnerability.
What versions of giflib are affected by CVE-2026-26740?
CVE-2026-26740 specifically affects giflib version 5.2.2.
What is the impact of exploiting CVE-2026-26740?
Exploiting CVE-2026-26740 can lead to a denial of service, disrupting the functionality of applications using the vulnerable giflib.
How can I determine if my system is vulnerable to CVE-2026-26740?
You can determine if your system is vulnerable to CVE-2026-26740 by checking if you are running giflib version 5.2.2.