# CVE-2024-50227: linux: In the Linux kernel, the following vulnerability has been resolved:  thunderbolt: Fix KASAN reported stack out-of-bou...

CVE-2024-50227 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-50227, released November 9, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-50227
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 9, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  thunderbolt: Fix KASAN reported stack out-of-bounds read in tb_retimer_scan()  KASAN reported following issue:   BUG: KASAN: stack-out-of-bounds in tb_retimer_scan+0xffe/0x1550 [thunderbolt]  Read of size 4 at addr ffff88810111fc1c by task kworker/u56:0/11  CPU: 0 UID: 0 PID: 11 Comm: kworker/u56:0 Tainted: G     U             6.11.0+ #1387  Tainted: [U]=USER  Workqueue: thunderbolt0 tb_handle_hotplug [thunderbolt]  Call Trace:   <TASK>   dump_stack_lvl+0x6c/0x90   print_report+0xd1/0x630   kasan_report+0xdb/0x110   __asan_report_load4_noabort+0x14/0x20   tb_retimer_scan+0xffe/0x1550 [thunderbolt]   tb_scan_port+0xa6f/0x2060 [thunderbolt]   tb_handle_hotplug+0x17b1/0x3080 [thunderbolt]   process_one_work+0x626/0x1100   worker_thread+0x6c8/0xfa0   kthread+0x2c8/0x3a0   ret_from_fork+0x3a/0x80   ret_from_fork_asm+0x1a/0x30  This happens because the loop variable still gets incremented by one so max becomes 3 instead of 2, and this makes the second loop read past the the array declared on the stack.  Fix this by assigning to max directly in the loop body.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.11.7-1 | [DEBIAN-CVE-2024-50227](https://patchblox.com/security/data/fix/linux/debian-cve-2024-50227.md) | Nov 9, 2024 |
| Linux | linux Debian 14 | 6.11.7-1 | [DEBIAN-CVE-2024-50227](https://patchblox.com/security/data/fix/linux/debian-cve-2024-50227.md) | Nov 9, 2024 |

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