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CVE-2025-1246: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Arm Ltd Bifrost GPU U

28
Routine
HIGH 7.8UPGRADEUPGRADEUPGRADE

CVE-2025-1246 is a high-severity flaw (CVSS 7.8) affecting 5th gen gpu architecture userspace driver, bifrost gpu userspace driver, valhall gpu userspace driver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Arm Ltd Bifrost GPU Userspace Driver, Arm Ltd Valhall GPU Userspace Driver, Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver allows a non-privileged user process to perform valid GPU processing operations, including via WebGL or WebGPU, to access outside of buffer bounds.This issue affects Bifrost GPU Userspace Driver: from r18p0 through r49p3, from r50p

Why this priority

  • High severity

A fixed release or distro patch exists.

Risk facts

CVSS score7.8 (High)
Attack vectorLocal
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.2% (top 95%)
CISA exploited listNo
WeaknessCWE-119
Published2025-06-02
Last modified2026-06-17
Publisher (CNA): Arm Limited · Vendor: arm

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

arm 5th gen gpu architecture userspace driver UPGRADE
Affected: >= r41p0 and < r49p4 · >= r50p0 and < r54p1
Fixed in: r49p4, r54p1
Safe to downgrade to: a release before r41p0
1. Check installed version
apt-cache policy 5th-gen-gpu-architecture-userspace-driver || rpm -q 5th-gen-gpu-architecture-userspace-driver || 5th-gen-gpu-architecture-userspace-driver --version
2. UPGRADE to r49p4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade 5th-gen-gpu-architecture-userspace-driver
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade 5th-gen-gpu-architecture-userspace-driver
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 r41p0 (Debian / Ubuntu)
apt-cache madison 5th-gen-gpu-architecture-userspace-driver sudo apt install 5th-gen-gpu-architecture-userspace-driver=<VERSION_BEFORE_r41p0> sudo apt-mark hold 5th-gen-gpu-architecture-userspace-driver
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list 5th-gen-gpu-architecture-userspace-driver sudo dnf downgrade 5th-gen-gpu-architecture-userspace-driver-<VERSION_BEFORE_r41p0> sudo dnf versionlock add 5th-gen-gpu-architecture-userspace-driver
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.
arm bifrost gpu userspace driver UPGRADE
Affected: >= r48p0 and < r49p4 · r50p0 · r51p0
Fixed in: r49p4
Safe to downgrade to: a release before r48p0
1. Check installed version
apt-cache policy bifrost-gpu-userspace-driver || rpm -q bifrost-gpu-userspace-driver || bifrost-gpu-userspace-driver --version
2. UPGRADE to r49p4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade bifrost-gpu-userspace-driver
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade bifrost-gpu-userspace-driver
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 r48p0 (Debian / Ubuntu)
apt-cache madison bifrost-gpu-userspace-driver sudo apt install bifrost-gpu-userspace-driver=<VERSION_BEFORE_r48p0> sudo apt-mark hold bifrost-gpu-userspace-driver
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list bifrost-gpu-userspace-driver sudo dnf downgrade bifrost-gpu-userspace-driver-<VERSION_BEFORE_r48p0> sudo dnf versionlock add bifrost-gpu-userspace-driver
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.
arm valhall gpu userspace driver UPGRADE
Affected: >= r28p0 and < r49p4 · >= r50p0 and < r54p1
Fixed in: r49p4, r54p1
Safe to downgrade to: a release before r28p0
1. Check installed version
apt-cache policy valhall-gpu-userspace-driver || rpm -q valhall-gpu-userspace-driver || valhall-gpu-userspace-driver --version
2. UPGRADE to r49p4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade valhall-gpu-userspace-driver
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade valhall-gpu-userspace-driver
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 r28p0 (Debian / Ubuntu)
apt-cache madison valhall-gpu-userspace-driver sudo apt install valhall-gpu-userspace-driver=<VERSION_BEFORE_r28p0> sudo apt-mark hold valhall-gpu-userspace-driver
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list valhall-gpu-userspace-driver sudo dnf downgrade valhall-gpu-userspace-driver-<VERSION_BEFORE_r28p0> sudo dnf versionlock add valhall-gpu-userspace-driver
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.
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-2025-1246?

5th gen gpu architecture userspace driver: upgrade to r49p4, r54p1; bifrost gpu userspace driver: upgrade to r49p4; valhall gpu userspace driver: upgrade to r49p4, r54p1. Exact commands for each OS are on this page.

Is CVE-2025-1246 being exploited?

CVE-2025-1246 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-2025-1246 affect?

CVE-2025-1246 affects 5th gen gpu architecture userspace driver, bifrost gpu userspace driver, valhall gpu userspace driver. Severity is high (CVSS 7.8). Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Arm Ltd Bifrost GPU Userspace Driver, Arm Ltd Valhall GPU Userspace Driver, Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver allows a non-privileg

How urgent is CVE-2025-1246?

Priority 28/100. High severity

Related CVEs

References

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