# CVE-2023-53144: linux: In the Linux kernel, the following vulnerability has been resolved:  erofs: fix wrong kunmap when using LZMA on HIGHM...

CVE-2023-53144 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53144, released May 2, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-53144
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 2, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  erofs: fix wrong kunmap when using LZMA on HIGHMEM platforms  As the call trace shown, the root cause is kunmap incorrect pages:   BUG: kernel NULL pointer dereference, address: 00000000  CPU: 1 PID: 40 Comm: kworker/u5:0 Not tainted 6.2.0-rc5 #4  Workqueue: erofs_worker z_erofs_decompressqueue_work  EIP: z_erofs_lzma_decompress+0x34b/0x8ac   z_erofs_decompress+0x12/0x14   z_erofs_decompress_queue+0x7e7/0xb1c   z_erofs_decompressqueue_work+0x32/0x60   process_one_work+0x24b/0x4d8   ? process_one_work+0x1a4/0x4d8   worker_thread+0x14c/0x3fc   kthread+0xe6/0x10c   ? rescuer_thread+0x358/0x358   ? kthread_complete_and_exit+0x18/0x18   ret_from_fork+0x1c/0x28  ---[ end trace 0000000000000000 ]---  The bug is trivial and should be fixed now.  It has no impact on !HIGHMEM platforms.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.20-1 | [DEBIAN-CVE-2023-53144](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53144.md) | May 2, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.20-1 | [DEBIAN-CVE-2023-53144](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53144.md) | May 2, 2025 |
| Linux | linux Debian 14 | 6.1.20-1 | [DEBIAN-CVE-2023-53144](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53144.md) | May 2, 2025 |

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