# CVE-2022-48713: linux: In the Linux kernel, the following vulnerability has been resolved:  perf/x86/intel/pt: Fix crash with stop filters i...

CVE-2022-48713 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48713, released June 20, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48713
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 20, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  perf/x86/intel/pt: Fix crash with stop filters in single-range mode  Add a check for !buf->single before calling pt_buffer_region_size in a place where a missing check can cause a kernel crash.  Fixes a bug introduced by commit 670638477aed ("perf/x86/intel/pt: Opportunistically use single range output mode"), which added a support for PT single-range output mode. Since that commit if a PT stop filter range is hit while tracing, the kernel will crash because of a null pointer dereference in pt_handle_status due to calling pt_buffer_region_size without a ToPA configured.  The commit which introduced single-range mode guarded almost all uses of the ToPA buffer variables with checks of the buf->single variable, but missed the case where tracing was stopped by the PT hardware, which happens when execution hits a configured stop filter.  Tested that hitting a stop filter while PT recording successfully records a trace with this patch but crashes without this patch.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.16.10-1 | [DEBIAN-CVE-2022-48713](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48713.md) | Jun 20, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.16.10-1 | [DEBIAN-CVE-2022-48713](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48713.md) | Jun 20, 2024 |
| Linux | linux Debian 14 | 5.16.10-1 | [DEBIAN-CVE-2022-48713](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48713.md) | Jun 20, 2024 |

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