Medium [CVE-2026-40386] Denial of Service and information disclosure via integer underflow in MakerNote decoding
This medium-severity Red Hat Linux advisory covers CVE-2026-40386 affecting Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 7.
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Summary
Denial of Service and information disclosure via integer underflow in MakerNote decoding. Red Hat rates this moderate (CVSS 4).
Weakness: CWE-191. Affected package(s): libexif.
Resolved in Red Hat advisory RHSA-2026:26276 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 1.
- libexif-0:0.6.22-6.el9_8.1
- libexif-0:0.6.22-5.el8_6.1
- libexif-0:0.6.22-5.el8_8.1
- libexif-0:0.6.22-3.el7_9
- libexif-0:0.6.22-5.el8_4.1
- libexif-0:0.6.22-6.el8_10
- libexif-0:0.6.22-6.el9_2.1
- libexif-0:0.6.22-6.el9_4.1
- libexif-0:0.6.24-9.el10_0.1
- libexif-0:0.6.22-6.el9_6.1
- libexif-0:0.6.24-9.el10_2.1
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:26276
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:26276 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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