# CVE-2024-44993: linux: In the Linux kernel, the following vulnerability has been resolved:  drm/v3d: Fix out-of-bounds read in `v3d_csd_job_...

CVE-2024-44993 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-44993, released September 4, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-44993
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 4, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  drm/v3d: Fix out-of-bounds read in `v3d_csd_job_run()`  When enabling UBSAN on Raspberry Pi 5, we get the following warning:  [  387.894977] UBSAN: array-index-out-of-bounds in drivers/gpu/drm/v3d/v3d_sched.c:320:3 [  387.903868] index 7 is out of range for type '__u32 [7]' [  387.909692] CPU: 0 PID: 1207 Comm: kworker/u16:2 Tainted: G        WC         6.10.3-v8-16k-numa #151 [  387.919166] Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT) [  387.925961] Workqueue: v3d_csd drm_sched_run_job_work [gpu_sched] [  387.932525] Call trace: [  387.935296]  dump_backtrace+0x170/0x1b8 [  387.939403]  show_stack+0x20/0x38 [  387.942907]  dump_stack_lvl+0x90/0xd0 [  387.946785]  dump_stack+0x18/0x28 [  387.950301]  __ubsan_handle_out_of_bounds+0x98/0xd0 [  387.955383]  v3d_csd_job_run+0x3a8/0x438 [v3d] [  387.960707]  drm_sched_run_job_work+0x520/0x6d0 [gpu_sched] [  387.966862]  process_one_work+0x62c/0xb48 [  387.971296]  worker_thread+0x468/0x5b0 [  387.975317]  kthread+0x1c4/0x1e0 [  387.978818]  ret_from_fork+0x10/0x20 [  387.983014] ---[ end trace ]---  This happens because the UAPI provides only seven configuration registers and we are reading the eighth position of this u32 array.  Therefore, fix the out-of-bounds read in `v3d_csd_job_run()` by accessing only seven positions on the '__u32 [7]' array. The eighth register exists indeed on V3D 7.1, but it isn't currently used. That being so, let's guarantee that it remains unused and add a note that it could be set in a future patch.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.10.7-1 | [DEBIAN-CVE-2024-44993](https://patchblox.com/security/data/fix/linux/debian-cve-2024-44993.md) | Sep 4, 2024 |
| Linux | linux Debian 14 | 6.10.7-1 | [DEBIAN-CVE-2024-44993](https://patchblox.com/security/data/fix/linux/debian-cve-2024-44993.md) | Sep 4, 2024 |

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