# CVE-2026-89592: linux: In the Linux kernel, the following vulnerability has been resolved:  accel/rocket: fix NULL dereference and integer o...

CVE-2026-89592 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89592 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-89592
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 11, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-89592](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89592.md) | Sep 23, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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