CVE-2026-68427 json
gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings
published 2026-08-10 2 mo ago modified 2026-10-19 20 d ago also EUVD-2026-55613
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 2%
- public exploits
- 0
- none known
Summary
In the Linux kernel, the following vulnerability has been resolved:
gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings
__host1x_bo_unpin() drops the last reference to the mapping and frees it, so we can't dereference mapping afterwards. The cache itself outlives the mapping, so use the cache local variable instead.
Patch / fix
- Linux Linux 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6
- linux Debian 12 6.1.187-1
- linux Debian 13 6.12.101-1
- linux Debian 14 7.1.6-1
- linux-6.12 Debian 12 6.12.101-1~deb12u1
debian advisories DEBIAN-CVE-2026-68427
- linux Ubuntu 24.04 LTS 6.8.0-147.147
- linux Ubuntu 26.04 LTS 7.0.0-38.38
- linux-aws Ubuntu 24.04 LTS 6.8.0-1067.70
- linux-aws Ubuntu 26.04 LTS 7.0.0-1014.14
- linux-gcp Ubuntu 24.04 LTS 6.8.0-1071.79
- linux-gcp Ubuntu 26.04 LTS 7.0.0-1014.14
- linux-gke Ubuntu 24.04 LTS 6.8.0-1066.74
- linux-gke Ubuntu 26.04 LTS 7.0.0-1008.9
ubuntu advisories UBUNTU-CVE-2026-68427
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
- kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.81.1
- kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.81.1
- kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
- kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.81.1
- kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
- kernel-obs-build SLE Module for Development Tools 15 SP7 6.4.0-150700.53.81.1
- kernel-default-base SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1.150700.17.45.1
suse advisories SUSE-SU-2026:4254-1SUSE-SU-2026:23887-1SUSE-SU-2026:23902-1SUSE-SU-2026:23897-1SUSE-SU-2026:23881-1SUSE-SU-2026:4120-1
- kernel-rt openSUSE Leap 16.0 6.12.0-160000.38.1
- dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-64kb openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-syms openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-azure openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-source openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-default openSUSE Leap 16.0 6.12.0-160000.38.1
opensuse advisories openSUSE-SU-2026:21910-1
- git.kernel.org/stable/c/86a9bd8c8f422d5f3079da31e151868902fcc702 commit
- git.kernel.org/stable/c/abeff53233b984571b87582bb588b4b38ef4ea50 commit
- git.kernel.org/stable/c/5b7e5f84d3d4cea10c3764d2da274810a7934228 commit
- git.kernel.org/stable/c/5f4de3c717d34a24d555af581947742980778c02 commit
- git.kernel.org/stable/c/b773faa32b0a98c3eb2b50d96de631681e5d1157 commit
- git.kernel.org/stable/c/266cddf7bd0f6c79b6c0633aef742a22bf70265b commit
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-68427 updated cvss 7.0
kernel: gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings
-
Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernelaffected: no fix available
-
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 morenot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 23 d ago
Exploit prediction
0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Linux Linux
Classification
- Weakness
-
- CWE-416 Use After Free
- Technology feeds
References
- git.kernel.org /stable/c/86a9bd8c8f422d5f3079da31e151868902fcc702
- git.kernel.org /stable/c/abeff53233b984571b87582bb588b4b38ef4ea50
- git.kernel.org /stable/c/5b7e5f84d3d4cea10c3764d2da274810a7934228
- git.kernel.org /stable/c/5f4de3c717d34a24d555af581947742980778c02
- git.kernel.org /stable/c/b773faa32b0a98c3eb2b50d96de631681e5d1157
- git.kernel.org /stable/c/266cddf7bd0f6c79b6c0633aef742a22bf70265b
Sources
- CVE List CVE-2026-68427
- NVD CVE-2026-68427
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.