CVE-2026-26740: n/a
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.
AI Analysis
Technical Summary
CVE-2026-26740 is a buffer overflow vulnerability in giflib version 5.2.2. The vulnerability occurs in the EGifGCBToExtension function, where it overwrites an existing Graphic Control Extension block without validating the allocated size, leading to a denial of service condition. The vulnerability has a CVSS 3.1 base score of 8.2, indicating high severity. Red Hat has published an advisory and released updated giflib packages for Red Hat Enterprise Linux 10.0 Extended Update Support to fix this issue.
Potential Impact
Successful exploitation of this vulnerability allows a remote attacker to cause a denial of service by triggering a buffer overflow in giflib 5.2.2. This results in service disruption but does not impact confidentiality or cause data integrity loss according to the CVSS vector.
Mitigation Recommendations
Red Hat has released updated giflib packages that address this vulnerability. Users of affected Red Hat Enterprise Linux 10.0 Extended Update Support versions should apply the official security update as described in the Red Hat advisory (RHSA-2026:33447) to remediate this issue. Patch status is confirmed by the vendor advisory. No additional mitigations are specified.
CVE-2026-26740: n/a
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 v3.1
Score 8.2high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-26740 is a buffer overflow vulnerability in giflib version 5.2.2. The vulnerability occurs in the EGifGCBToExtension function, where it overwrites an existing Graphic Control Extension block without validating the allocated size, leading to a denial of service condition. The vulnerability has a CVSS 3.1 base score of 8.2, indicating high severity. Red Hat has published an advisory and released updated giflib packages for Red Hat Enterprise Linux 10.0 Extended Update Support to fix this issue.
Potential Impact
Successful exploitation of this vulnerability allows a remote attacker to cause a denial of service by triggering a buffer overflow in giflib 5.2.2. This results in service disruption but does not impact confidentiality or cause data integrity loss according to the CVSS vector.
Mitigation Recommendations
Red Hat has released updated giflib packages that address this vulnerability. Users of affected Red Hat Enterprise Linux 10.0 Extended Update Support versions should apply the official security update as described in the Red Hat advisory (RHSA-2026:33447) to remediate this issue. Patch status is confirmed by the vendor advisory. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-02-16T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-26740","vendor":"Red Hat"}]
Threat ID: 69baf5d2771bdb1749bce2b6
Added to database: 03/18/2026, 18:58:26 UTC
Last enriched: 07/23/2026, 21:28:13 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 186
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