CVE-2026-48029: struktur libheif Out-of-bounds Read
CVSS: 7.1v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-48029DEBIAN-CVE-2026-48029
Published 22-07-2026Last modified 22-07-2026
Vulnerability summary
CVE-2026-48029 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in struktur libheif. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.2% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.1/10
010
High · v3.1 (CVE.org)EPSS score
0.36%
0%100%
Low · +0.05 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 4 · Related 5Timeline
- 22-07-2026PublishedVulnerability first disclosed.
- 22-07-2026Last modifiedVulnerability information updated.
Description
libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.19.0 through 1.21.2 have a heap OOB read in ImageItem_Grid::decode_grid_tile via irot-induced tile-coordinate underflow. Version 1.22.0 fixes the issue.
CVSS metrics
4 scores · 4 sources · 1 versionHigh 7.1Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
- NVDNIST7.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
EPSS trend
Probability
0.36%
Chance of exploitation in the next 30 days
Percentile
28%
Versus all other CVEs
30-day change
+0.05 pp
From 0.30% on 19-09-2026
19-09-202619-10-2026
EPSS score0.36%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundLibheif
Maturity: poc
Weaknesses
CWE · root cause- CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
- CWE-191Integer Underflow (Wrap or Wraparound)The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
Affected systems
Debian1 product
- libheifAll versions (No fix recorded) | < 1.19.8-1+deb13u1 | < 1.23.1-1
Struktur1 product
- libheif≥ 1.19.0, < 1.22.0
Strukturag1 product
- libheif≥ 1.19.0, < 1.22.0
Ubuntu1 product
- libheif< 1.20.2-1ubuntu0.6 | < 1.21.2-3ubuntu0.3
4 vendors · 4 products
References
6 links- github.com/strukturag/libheif/security/advisories/GHSA-6x5f-qchq-cxqvX Refsource CONFIRMREPORTMitigationVendor AdvisoryExploit
