CVE-2026-89592

CVE CVE-2026-89592EUVD EUVD-2026-76504Published 2026-09-11T19:44:55.000Z

What the advisory describes

In 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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux 0810d5ad88a18f1e6d549853a388ad0316f74e36 <c1a5bf1b6e1d5944183dcef3844a18c17219af4d; 0810d5ad88a18f1e6d549853a388ad0316f74e36 <a85402bff218f2b8f0d806e46c16c2f3d49cdda7; 6.18; 0810d5ad88a18f1e6d549853a388ad0316f74e36 <dfff90a6eb2258e3b867994ae17af4a7ba3504d2; patch: 7.2.4; patch: 7.3-rc1; patch: 0; patch: 6.18.50

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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