Red Hat Security Advisory: libexif security update
Two vulnerabilities in the libexif library used by Red Hat Enterprise Linux 9.2 can lead to information disclosure, crashes, and denial of service. These issues stem from integer overflow and underflow errors in the handling and decoding of Nikon MakerNote metadata. The vulnerabilities have been rated with moderate severity by Red Hat Product Security. A security update addressing these issues is available for affected Red Hat Enterprise Linux 9.2 versions.
AI Analysis
Technical Summary
The libexif library contains two security flaws: an integer overflow in Nikon MakerNote handling (CVE-2026-40385) that can lead to information disclosure and crashes, and an integer underflow in MakerNote decoding (CVE-2026-40386) that can cause denial of service and information disclosure. Both vulnerabilities arise from improper integer handling in metadata extraction routines. These vulnerabilities affect Red Hat Enterprise Linux 8 and related CodeReady Linux Builder packages. Red Hat has issued a security advisory (RHSA-2026:20929) providing updated libexif packages to remediate these issues.
Potential Impact
Successful exploitation of CVE-2026-40385 may result in information disclosure and application crashes due to integer overflow in Nikon MakerNote processing. CVE-2026-40386 may allow denial of service and information disclosure through integer underflow during MakerNote decoding. These vulnerabilities could impact applications relying on libexif to process image metadata, potentially leading to service disruption and leakage of sensitive information.
Mitigation Recommendations
Red Hat has released updated libexif packages for Red Hat Enterprise Linux 8 and related CodeReady Linux Builder variants that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:20929 to remediate these issues. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation is indicated by the vendor advisory.
Red Hat Security Advisory: libexif security update
Description
Two vulnerabilities in the libexif library used by Red Hat Enterprise Linux 9.2 can lead to information disclosure, crashes, and denial of service. These issues stem from integer overflow and underflow errors in the handling and decoding of Nikon MakerNote metadata. The vulnerabilities have been rated with moderate severity by Red Hat Product Security. A security update addressing these issues is available for affected Red Hat Enterprise Linux 9.2 versions.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The libexif library contains two security flaws: an integer overflow in Nikon MakerNote handling (CVE-2026-40385) that can lead to information disclosure and crashes, and an integer underflow in MakerNote decoding (CVE-2026-40386) that can cause denial of service and information disclosure. Both vulnerabilities arise from improper integer handling in metadata extraction routines. These vulnerabilities affect Red Hat Enterprise Linux 8 and related CodeReady Linux Builder packages. Red Hat has issued a security advisory (RHSA-2026:20929) providing updated libexif packages to remediate these issues.
Potential Impact
Successful exploitation of CVE-2026-40385 may result in information disclosure and application crashes due to integer overflow in Nikon MakerNote processing. CVE-2026-40386 may allow denial of service and information disclosure through integer underflow during MakerNote decoding. These vulnerabilities could impact applications relying on libexif to process image metadata, potentially leading to service disruption and leakage of sensitive information.
Mitigation Recommendations
Red Hat has released updated libexif packages for Red Hat Enterprise Linux 8 and related CodeReady Linux Builder variants that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:20929 to remediate these issues. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation is indicated by the vendor advisory.
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: 05/26/2026, 20:58:00 UTC
Last enriched: 07/13/2026, 10:53:29 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 105
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