kernel: accel/rocket: fix UAF via dangling GEM handle in create_bo

cve CVE-2026-64008 2 sources, 2 claims · Watch

Red Hat writes:
kernel: accel/rocket: fix UAF via dangling GEM handle in create_bo the claim

What it is to other things

affectslinux/linux_kernel
NVD
made_bylinux
NVD

In words only, so not counted until a person confirms one:

affectslinux/linux
NVD says “Linux · Linux”

What each source says

PropertySourceSaidMeans here
Cvss
cvss
conflict		NVD7.8
receipt
Source
NVD
Its words
7.8
Read by
field:cve.metrics.cvssMetricV31[].cvssData.baseScore
Said since
2026-10-03 00:06 UTC
Last answered
2026-10-04 18:16 UTC
Original
open at the source
What the source handed over
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        "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/rocket: fix UAF via dangling GEM handle in create_bo\n\nrocket_ioctl_create_bo() inserts a GEM handle into the file's IDR via\ndrm_gem_handle_create() early on, then performs several operations that\ncan fail (sgt allocation, drm_mm insert, iommu_map). If any fail after\nthe handle is live, the error path calls drm_gem_shmem_object_free()\nwhich kfree's the object without removing the handle from the IDR.\n\nThis leaves a dangling handle pointing to freed slab memory. Any\nsubsequent ioctl using that handle (PREP_BO, FINI_BO, SUBMIT) calls\ndrm_gem_object_lookup() and dereferences freed memory (UAF).\n\nFix by moving drm_gem_handle_create() to after all fallible operations\nsucceed, matching the pattern used by panfrost, lima, and etnaviv.\n\nAlso fix drm_mm_insert_node_generic() whose return value was silently\noverwritten by iommu_map_sgtable() on the next line. Add the missing\nerror check.\n\n[tomeu: Move handle creation to the very end]"
      }
    ],
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            "privilegesRequired": "LOW",
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—
Cvss
cvss
conflict		Red Hat7
receipt
Source
Red Hat
Its words
7.0
Read by
field:cvss3_score
Said since
2026-09-29 09:44 UTC
Last answered
2026-10-04 18:16 UTC
Original
open at the source
What the source handed over
{
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  "CWE": "CWE-825",
  "advisories": [],
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  "severity": "important"
}
—
Cwe
cwe
Red HatCWE-825
receipt
Source
Red Hat
Its words
CWE-825
Read by
field:CWE
Said since
2026-09-29 09:44 UTC
Last answered
2026-10-04 18:16 UTC
Original
open at the source
What the source handed over
{
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  "CWE": "CWE-825",
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}
—
Product
product
NVDLinux
receipt
Source
NVD
Its words
Linux
Read by
field:cve.affected[].affectedData[].product
Said since
2026-10-03 00:06 UTC
Last answered
2026-10-04 18:16 UTC
Original
open at the source
What the source handed over
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—
Severity
severity
Red Hatimportant
A flaw that can easily compromise confidentiality, integrity or availability.
receipt
Source
Red Hat
Its words
important
Read by
field:severity
Said since
2026-09-29 09:44 UTC
Last answered
2026-10-04 18:16 UTC
Original
open at the source
What the source handed over
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  "CWE": "CWE-825",
  "advisories": [],
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high
Status
status
NVDAnalyzed
receipt
Source
NVD
Its words
Analyzed
Read by
field:cve.vulnStatus
Said since
2026-10-03 00:06 UTC
Last answered
2026-10-04 18:16 UTC
Original
open at the source
What the source handed over
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}
—
Vendor
vendor
NVDLinux
receipt
Source
NVD
Its words
Linux
Read by
field:cve.affected[].affectedData[].vendor
Said since
2026-10-03 00:06 UTC
Last answered
2026-10-04 18:16 UTC
Original
open at the source
What the source handed over
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}
—

vulnerability

kernel: accel/rocket: fix UAF via dangling GEM handle in create_bo
zetlyn/cve-redhat · 2026-07-19
cvss 7 cwe CWE-825 severity important source
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]
zetlyn/cve-nvd · 2026-07-19
cvss 7.8 product Linux status Analyzed vendor Linux source