CVE-2026-41071: libheif is a HEIF and AVIF file format decoder and encoder

Q: How do I fix CVE-2026-41071?

libheif: upgrade to 1.22.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-41071 being exploited?

CVE-2026-41071 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41071 affect?

CVE-2026-41071 affects libheif. Severity is high (CVSS 8.1). libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a crafted HEIF sequence file where the saiz box declares more samples than actually exist in the track's chunk table causes a heap-buffer-overflow (ou

Q: How urgent is CVE-2026-41071?

Priority 39/100. High severity; Public exploit reference

Routine

HIGH 8.1UPGRADE

CVE-2026-41071 is a high-severity flaw (CVSS 8.1) affecting libheif. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a crafted HEIF sequence file where the saiz box declares more samples than actually exist in the track's chunk table causes a heap-buffer-overflow (out-of-bounds read) in the SampleAuxInfoReader constructor. The SampleAuxInfoReader constructor iterates over saiz->get_num_samples() samples but doesn't validate that this count is consistent with the number of

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-05-22
Last modified	2026-07-23

Publisher (CNA): GitHub, Inc. · Vendor: struktur

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-22 22:16 UTCPublished CVE record published
2026-07-23 11:10 UTCUpdated Record last modified

struktur libheif UPGRADE

Affected: < 1.22.0

Fixed in: 1.22.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libheif || rpm -q libheif || libheif --version

2. UPGRADE to 1.22.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libheif

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libheif

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41071?

libheif: upgrade to 1.22.0. Exact commands for each OS are on this page.

Is CVE-2026-41071 being exploited?

CVE-2026-41071 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41071 affect?

CVE-2026-41071 affects libheif. Severity is high (CVSS 8.1). libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a crafted HEIF sequence file where the saiz box declares more samples than actually exist in the track's chunk table causes a heap-buffer-overflow (ou

How urgent is CVE-2026-41071?

Priority 39/100. High severity; Public exploit reference

Related CVEs

CVE-2026-49271 MEDIUM 6.5 UPGRADE libheif is a HEIF and AVIF file format decoder and encoder
CVE-2026-47247 HIGH 7.5 UPGRADE libheif is a HEIF and AVIF file format decoder and encoder
CVE-2026-47178 MEDIUM 6.1 UPGRADE libheif is a HEIF and AVIF file format decoder and encoder
CVE-2026-47251 MEDIUM 6.1 UPGRADE libheif is a HEIF and AVIF file format decoder and encoder
CVE-2026-47254 MEDIUM 6.1 UPGRADE libheif is a HEIF and AVIF file format decoder and encoder

References

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