CVE-2026-40386: libexif_project libexif Integer Underflow (Wrap or Wraparound)
CVSS: 7.1v3.1HighAnalyzed
AliasesRHSA-2026:22529RHSA-2026:26274UBUNTU-CVE-2026-40386DEBIAN-CVE-2026-40386
Published 12-04-2026Last modified 14-04-2026
Vulnerability summary
CVE-2026-40386 is a high (CVSS 7.1) Integer Underflow (Wrap or Wraparound) vulnerability in libexif_project libexif. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.4% of scored vulnerabilities.
CVSS score
7.1/10
010
High · v3.1 (NVD)EPSS score
0.13%
0%100%
Low · -0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 16 · Related 6Timeline
- 12-04-2026PublishedVulnerability first disclosed.
- 14-04-2026Last modifiedVulnerability information updated.
Description
In libexif through 0.6.25, an integer underflow in size checking for Fuji and Olympus MakerNote decoding could be used by attackers to crash or leak information out of libexif-using programs.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.1Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HSources5 sources · 4.0–7.1
- CVE.orgCNA4.0MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:LDiffers
- OSV · Red hatEcosystem advisory · calculated4.0MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.13%
Chance of exploitation in the next 30 days
Percentile
2%
Versus all other CVEs
30-day change
-0.01 pp
From 0.14% on 19-09-2026
19-09-202619-10-2026
EPSS score0.13%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat5 products
- libexif< 0:0.6.24-9.el10_2.1 | < 0:0.6.24-9.el10_0.1
- libexif-debuginfo< 0:0.6.24-9.el10_2.1 | < 0:0.6.24-9.el10_0.1
- libexif-debugsource< 0:0.6.24-9.el10_2.1 | < 0:0.6.24-9.el10_0.1
- libexif-devel< 0:0.6.24-9.el10_2.1 | < 0:0.6.24-9.el10_0.1
- libexif-doc< 0:0.6.24-9.el10_2.1 | < 0:0.6.24-9.el10_0.1
Debian1 product
- libexif< 0.6.24-1+deb12u1 | < 0.6.25-1+deb13u1 | < 0.6.26-1
Libexif_project1 product
- libexif≤ 0.6.25
Ubuntu1 product
- libexifAll versions (No fix recorded) | < 0.6.24-1ubuntu0.22.04.1 | < 0.6.24-1ubuntu0.24.04.1 | < 0.6.25-2ubuntu0.1
4 vendors · 8 products
