Red Hat Security Advisory: libexif security update
Two vulnerabilities in the libexif library used by Red Hat Enterprise Linux 8 allow information disclosure and denial of service via integer overflow and underflow in Nikon MakerNote handling and decoding. These issues could cause crashes or leak information when processing image metadata. Red Hat has released an update addressing these flaws with a moderate security impact rating.
AI Analysis
Technical Summary
The libexif library, which extracts metadata from image files, contains two vulnerabilities: CVE-2026-40385 involves an integer overflow in Nikon MakerNote handling that can lead to information disclosure and crashes; CVE-2026-40386 involves an integer underflow in MakerNote decoding causing denial of service and information disclosure. These vulnerabilities affect multiple Red Hat Enterprise Linux 8 variants and related CodeReady Linux Builder packages. Red Hat Product Security has issued advisory RHSA-2026:20929 providing updated libexif packages to remediate these issues.
Potential Impact
Exploitation of these integer overflow and underflow vulnerabilities can result in application crashes (denial of service) and unauthorized disclosure of information extracted from image metadata. The impact is rated moderate by Red Hat, indicating these are significant but not critical flaws. No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released updated libexif packages for Red Hat Enterprise Linux 8 and related products that fix these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:20929 and the referenced article https://access.redhat.com/articles/11258. Patch status is confirmed as fixed by the vendor advisory. No additional mitigation steps are indicated.
Red Hat Security Advisory: libexif security update
Description
Two vulnerabilities in the libexif library used by Red Hat Enterprise Linux 8 allow information disclosure and denial of service via integer overflow and underflow in Nikon MakerNote handling and decoding. These issues could cause crashes or leak information when processing image metadata. Red Hat has released an update addressing these flaws with a moderate security impact rating.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The libexif library, which extracts metadata from image files, contains two vulnerabilities: CVE-2026-40385 involves an integer overflow in Nikon MakerNote handling that can lead to information disclosure and crashes; CVE-2026-40386 involves an integer underflow in MakerNote decoding causing denial of service and information disclosure. These vulnerabilities affect multiple Red Hat Enterprise Linux 8 variants and related CodeReady Linux Builder packages. Red Hat Product Security has issued advisory RHSA-2026:20929 providing updated libexif packages to remediate these issues.
Potential Impact
Exploitation of these integer overflow and underflow vulnerabilities can result in application crashes (denial of service) and unauthorized disclosure of information extracted from image metadata. The impact is rated moderate by Red Hat, indicating these are significant but not critical flaws. No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released updated libexif packages for Red Hat Enterprise Linux 8 and related products that fix these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:20929 and the referenced article https://access.redhat.com/articles/11258. Patch status is confirmed as fixed by the vendor advisory. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:20929
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-40386"]
- Cvss Version
- null
Threat ID: 6a160958e29bf47b50620352
Added to database: 5/26/2026, 8:58:00 PM
Last enriched: 5/26/2026, 9:15:52 PM
Last updated: 5/27/2026, 4:52:29 AM
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.