accel/rocket: fix NULL dereference and integer overflow in rocket_job_push()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89592
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:43 UTC
Updated2026-09-11 20:19:43 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: accel/rocket: fix NULL dereference and integer overflow in rocket_job_push() rocket_job_push() allocates a temporary array to hold all input and output GEM object pointers: bos = kvmalloc_array(job->in_bo_count + job->out_bo_count, sizeof(void *), GFP_KERNEL); memcpy(bos, job->in_bos, job->in_bo_count * sizeof(void *)); memcpy(&bos[job->in_bo_count], job->out_bos, ...); Two bugs exist: 1. Missing NULL check: if kvmalloc_array() fails, bos is NULL and the subsequent memcpy() dereferences it, causing a kernel NULL pointer dereference. 2. Integer overflow: in_bo_count and out_bo_count are both u32, set directly from userspace-supplied in_bo_handle_count and out_bo_handle_count with no prior validation. Their sum is computed in u32 arithmetic and can wrap to a smaller value, causing the allocation count passed to kvmalloc_array() to be smaller than intended. Subsequent uses still operate on the original counts when copying and locking objects, which may lead to out-of-bounds accesses on the temporary array. Fix by using check_add_overflow() to detect count overflow before the allocation, and adding a NULL check on the allocation result.

Risk And Classification

EPSS: 0.002060000 probability, percentile 0.108650000 (date 2026-09-14)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0810d5ad88a18f1e6d549853a388ad0316f74e36 c1a5bf1b6e1d5944183dcef3844a18c17219af4d git Not specified
CNA Linux Linux affected 0810d5ad88a18f1e6d549853a388ad0316f74e36 dfff90a6eb2258e3b867994ae17af4a7ba3504d2 git Not specified
CNA Linux Linux affected 0810d5ad88a18f1e6d549853a388ad0316f74e36 a85402bff218f2b8f0d806e46c16c2f3d49cdda7 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/dfff90a6eb2258e3b867994ae17af4a7ba3504d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c1a5bf1b6e1d5944183dcef3844a18c17219af4d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a85402bff218f2b8f0d806e46c16c2f3d49cdda7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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