CVE-2026-48029: libheif is a HEIF and AVIF file format decoder and encoder

Routine

HIGH 7.1UPGRADE

CVE-2026-48029 is a high-severity flaw (CVSS 7.1) 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. 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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-125, CWE-191
Published	2026-07-22
Last modified	2026-10-24

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

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-22 15:17 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

struktur libheif UPGRADE

Affected: >= 1.19.0 and < 1.22.0

Fixed in: 1.22.0

Safe to downgrade to: a release before 1.19.0

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.

3. If no update is available yet, DOWNGRADE to a release before 1.19.0 (Debian / Ubuntu)

apt-cache madison libheif sudo apt install libheif=<VERSION_BEFORE_1.19.0> sudo apt-mark hold libheif

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list libheif sudo dnf downgrade libheif-<VERSION_BEFORE_1.19.0> sudo dnf versionlock add libheif

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source

sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Ubuntu 25.10 · libheif · FIXED · 1.20.2-1ubuntu0.6

sudo apt update && sudo apt install --only-upgrade libheif dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libheif)" ge "1.20.2-1ubuntu0.6" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 20.04 · libheif · NOT AFFECTED

Ubuntu 22.04 · libheif · NOT AFFECTED

Ubuntu 24.04 · libheif · NOT AFFECTED

Debian 12 · libheif · NO FIX YET

Debian 13 · libheif · FIXED · 1.19.8-1+deb13u1

sudo apt update && sudo apt install --only-upgrade libheif dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libheif)" ge "1.19.8-1+deb13u1" && echo PATCHED || echo STILL-VULNERABLE

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-1971 · source

sudo dnf update --advisory=ALAS2023-2026-1971

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-2026-48029?

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

Is CVE-2026-48029 being exploited?

CVE-2026-48029 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-2026-48029 affect?

CVE-2026-48029 affects libheif. Severity is high (CVSS 7.1). 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.

How urgent is CVE-2026-48029?

Priority 37/100. High severity; Public exploit reference

References

← Back to latest CVEs