# CVE-2024-46688: linux: In the Linux kernel, the following vulnerability has been resolved:  erofs: fix out-of-bound access when z_erofs_gbuf...

CVE-2024-46688 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-46688, released September 13, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-46688
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 13, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  erofs: fix out-of-bound access when z_erofs_gbuf_growsize() partially fails  If z_erofs_gbuf_growsize() partially fails on a global buffer due to memory allocation failure or fault injection (as reported by syzbot [1]), new pages need to be freed by comparing to the existing pages to avoid memory leaks.  However, the old gbuf->pages[] array may not be large enough, which can lead to null-ptr-deref or out-of-bound access.  Fix this by checking against gbuf->nrpages in advance.  [1] https://lore.kernel.org/r/000000000000f7b96e062018c6e3@google.com

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.10.9-1 | [DEBIAN-CVE-2024-46688](https://patchblox.com/security/data/fix/linux/debian-cve-2024-46688.md) | Sep 13, 2024 |
| Linux | linux Debian 14 | 6.10.9-1 | [DEBIAN-CVE-2024-46688](https://patchblox.com/security/data/fix/linux/debian-cve-2024-46688.md) | Sep 13, 2024 |

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