CVE-2026-68427: gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings
Greg Kroah-Hartman <[email protected]>
| Newsgroups | org.kernel.vger.linux-cve-announce |
|---|---|
| Message-ID | <2026081053-CVE-2026-68427-c2c8@gregkh> |
From: Greg Kroah-Hartman <[email protected]> Description =========== 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. The Linux kernel CVE team has assigned CVE-2026-68427 to this issue. Affected and fixed versions =========================== Fixed in 6.6.148 with commit abeff53233b984571b87582bb588b4b38ef4ea50 Fixed in 6.12.101 with commit 5b7e5f84d3d4cea10c3764d2da274810a7934228 Fixed in 6.18.42 with commit 5f4de3c717d34a24d555af581947742980778c02 Fixed in 7.1.6 with commit b773faa32b0a98c3eb2b50d96de631681e5d1157 Fixed in 7.2-rc4 with commit 266cddf7bd0f6c79b6c0633aef742a22bf70265b Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-68427 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/gpu/host1x/bus.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/abeff53233b984571b87582bb588b4b38ef4ea50 https://git.kernel.org/stable/c/5b7e5f84d3d4cea10c3764d2da274810a7934228 https://git.kernel.org/stable/c/5f4de3c717d34a24d555af581947742980778c02 https://git.kernel.org/stable/c/b773faa32b0a98c3eb2b50d96de631681e5d1157 https://git.kernel.org/stable/c/266cddf7bd0f6c79b6c0633aef742a22bf70265b