drm/amdgpu: fix bo->pin leaking in amdgpu_bo_create_reserved
Summary
| CVE | CVE-2026-68234 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-10 13:20:11 UTC |
| Updated | 2026-08-18 07:16:50 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix bo->pin leaking in amdgpu_bo_create_reserved amdgpu_bo_create_reserved() only allocates a new BO when *bo_ptr (struct amdgpu_bo **bo_ptr as input parameter) is NULL, it simply skips creation when *bo_ptr is non-NULL. But it unconditionally reserves, pins, gart allocates and maps the BO afterwards. When the same non-NULL BO pointer is passed in again, for example firmware buffers that live in adev and are re-loaded on every resume / cp_resume / start under AMDGPU_FW_LOAD_DIRECT, amdgpu_bo_pin() just increases pin_count unconditionally, however the matching teardown only unpins once, so pin_count never drops to zero, so TTM is not able to move, swap or evict a BO, causing BO leaks. This commit fixes this issue by only pinning the bo once at creation, and repeated calls no longer take additional pin references. (cherry picked from commit 3ddc0ae76202c447b6aec61e907b852bc94671cf) |
Risk And Classification
EPSS: 0.001680000 probability, percentile 0.064830000 (date 2026-08-17)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 53766e5adac75872e9d413cdbfd0e47ae40701f9 51eeef1949c11d3dcb5f422a5d9b3f09ebe8a1bc git | Not specified |
| CNA | Linux | Linux | affected 53766e5adac75872e9d413cdbfd0e47ae40701f9 2f390b4c83011452753fd84972f657d2b00a952b git | Not specified |
| CNA | Linux | Linux | affected 53766e5adac75872e9d413cdbfd0e47ae40701f9 ba7b6444097a73ccd3d3ac9e2be4ebb73d226460 git | Not specified |
| CNA | Linux | Linux | affected 53766e5adac75872e9d413cdbfd0e47ae40701f9 9743f60013273987abf415dc47474683d22aaee9 git | Not specified |
| CNA | Linux | Linux | affected 53766e5adac75872e9d413cdbfd0e47ae40701f9 a2f895f3c852063258d62e9f74b081de07ca95df git | Not specified |
| CNA | Linux | Linux | affected 4.14 | Not specified |
| CNA | Linux | Linux | unaffected 4.14 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.148 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.101 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.42 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.6 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/a2f895f3c852063258d62e9f74b081de07ca95df | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ba7b6444097a73ccd3d3ac9e2be4ebb73d226460 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9743f60013273987abf415dc47474683d22aaee9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/51eeef1949c11d3dcb5f422a5d9b3f09ebe8a1bc | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2f390b4c83011452753fd84972f657d2b00a952b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.