CVE-2026-64008accel/rocket: fix UAF via dangling GEM handle in create_bo
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: accel/rocket: fix UAF via dangling GEM handle in create_bo rocket_ioctl_create_bo() inserts a GEM handle into the file's IDR via drm_gem_handle_create() early on, then performs several operations that can fail (sgt allocation, drm_mm insert, iommu_map). If any fail after the handle is live, the error path calls drm_gem_shmem_object_free() which kfree's the object without removing the handle from the IDR. This leaves a dangling handle pointing to freed slab memory. Any subsequent ioctl using that handle (PREP_BO, FINI_BO, SUBMIT) calls drm_gem_object_lookup() and dereferences freed memory (UAF). Fix by moving drm_gem_handle_create() to after all fallible operations succeed, matching the pattern used by panfrost, lima, and etnaviv. Also fix drm_mm_insert_node_generic() whose return value was silently overwritten by iommu_map_sgtable() on the next line. Add the missing error check. [tomeu: Move handle creation to the very end]
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 658ebeac33517bd3169d4b65ed801e9065d0211a builds before 18abd88d19ea195e2e1547fca0970c2f91d77a42; 658ebeac33517bd3169d4b65ed801e9065d0211a builds before 451f1ccbbdb7b65021646704b15902655f8d228a; from 658ebeac33517bd3169d4b65ed801e9065d0211a before f706e6a4ce75585af979aec3dcbdce68bc76306b | CNA record |
linux linux_kernel linux:linux_kernel | from 6.18 before 6.18.35; from 6.19 before 7.0.12; 7.1; 7.1; 7.1; 7.1; 7.1 | NVD |
References
- https://git.kernel.org/stable/c/18abd88d19ea195e2e1547fca0970c2f91d77a42patch
- https://git.kernel.org/stable/c/451f1ccbbdb7b65021646704b15902655f8d228apatch
- https://git.kernel.org/stable/c/f706e6a4ce75585af979aec3dcbdce68bc76306bpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.