CVE-2026-68234 (GCVE-0-2026-68234)
Vulnerability from cvelistv5
Published
2026-08-10 12:00
Modified
2026-08-19 16:32
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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)
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 53766e5adac75872e9d413cdbfd0e47ae40701f9 Version: 53766e5adac75872e9d413cdbfd0e47ae40701f9 Version: 53766e5adac75872e9d413cdbfd0e47ae40701f9 Version: 53766e5adac75872e9d413cdbfd0e47ae40701f9 Version: 53766e5adac75872e9d413cdbfd0e47ae40701f9 Version: 53766e5adac75872e9d413cdbfd0e47ae40701f9 Version: 53766e5adac75872e9d413cdbfd0e47ae40701f9 Version: 53766e5adac75872e9d413cdbfd0e47ae40701f9 |
||
{
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix bo-\u003epin leaking in amdgpu_bo_create_reserved\n\namdgpu_bo_create_reserved() only allocates a new BO when\n*bo_ptr (struct amdgpu_bo **bo_ptr as input parameter) is\nNULL, it simply skips creation when *bo_ptr is non-NULL.\nBut it unconditionally reserves, pins, gart allocates\nand maps the BO afterwards.\n\nWhen the same non-NULL BO pointer is passed in again,\nfor example firmware buffers that live in adev and are\nre-loaded on every resume / cp_resume / start\nunder AMDGPU_FW_LOAD_DIRECT, amdgpu_bo_pin() just increases\npin_count unconditionally, however the matching teardown only unpins\nonce, so pin_count never drops to zero, so TTM is not able\nto move, swap or evict a BO, causing BO leaks.\n\nThis commit fixes this issue by only pinning the bo\nonce at creation, and repeated calls no longer\ntake additional pin references.\n\n(cherry picked from commit 3ddc0ae76202c447b6aec61e907b852bc94671cf)"
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:32:06.457Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/7aea619d9f186dcf0f1289879e9edb69d2b56639"
},
{
"url": "https://git.kernel.org/stable/c/b572d0814c1366701ca704286589fab025802566"
},
{
"url": "https://git.kernel.org/stable/c/e06e0885725a16304b7723aeb478a78cca9dc96a"
},
{
"url": "https://git.kernel.org/stable/c/51eeef1949c11d3dcb5f422a5d9b3f09ebe8a1bc"
},
{
"url": "https://git.kernel.org/stable/c/2f390b4c83011452753fd84972f657d2b00a952b"
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{
"url": "https://git.kernel.org/stable/c/ba7b6444097a73ccd3d3ac9e2be4ebb73d226460"
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{
"url": "https://git.kernel.org/stable/c/9743f60013273987abf415dc47474683d22aaee9"
},
{
"url": "https://git.kernel.org/stable/c/a2f895f3c852063258d62e9f74b081de07ca95df"
}
],
"title": "drm/amdgpu: fix bo-\u003epin leaking in amdgpu_bo_create_reserved",
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}
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-68234",
"datePublished": "2026-08-10T12:00:59.074Z",
"dateReserved": "2026-07-30T09:28:09.376Z",
"dateUpdated": "2026-08-19T16:32:06.457Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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