# CVE-2024-26705: linux: In the Linux kernel, the following vulnerability has been resolved:  parisc: BTLB: Fix crash when setting up BTLB at...

CVE-2024-26705 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-26705, released April 3, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-26705
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 3, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  parisc: BTLB: Fix crash when setting up BTLB at CPU bringup  When using hotplug and bringing up a 32-bit CPU, ask the firmware about the BTLB information to set up the static (block) TLB entries.  For that write access to the static btlb_info struct is needed, but since it is marked __ro_after_init the kernel segfaults with missing write permissions.  Fix the crash by dropping the __ro_after_init annotation.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.7.7-1 | [DEBIAN-CVE-2024-26705](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26705.md) | Apr 3, 2024 |
| Linux | linux Debian 14 | 6.7.7-1 | [DEBIAN-CVE-2024-26705](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26705.md) | Apr 3, 2024 |

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