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.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-toolsUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.10.102-99.473Upgrade python-perfUpgrade bpftoolUpgrade perfUpgrade perf-debuginfoUpgrade kernel-develUpgrade kernelUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-headers | Aug 2, 2024 | Jun 20, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Jun 20, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-toolsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade python3-perf | Oct 9, 2024 | Jun 20, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 20, 2024 |
| Suse | — | Upgrade kernel-rt-livepatch-develUpgrade kernel-rt-vdsoUpgrade kernel-rt_debug-vdsoUpgrade dlm-kmp-rtUpgrade dlm-kmp-azureUpgrade kernel-azureUpgrade kernel-syms-rtUpgrade kernel-azure-develUpgrade gfs2-kmp-rtUpgrade kernel-syms-azureUpgrade kernel-rt-extraUpgrade kernel-rtUpgrade kernel-source-rtUpgrade kselftests-kmp-azureUpgrade kernel-azure-vdsoUpgrade reiserfs-kmp-azureUpgrade kernel-azure-livepatch-develUpgrade kernel-devel-azureUpgrade kernel-rt_debug-develUpgrade kernel-rt-optionalUpgrade gfs2-kmp-azureUpgrade kernel-rt-develUpgrade kernel-azure-optionalUpgrade kernel-devel-rtUpgrade kernel-rt-livepatchUpgrade cluster-md-kmp-azureUpgrade cluster-md-kmp-rtUpgrade ocfs2-kmp-azureUpgrade kernel-rt_debug-livepatch-develUpgrade reiserfs-kmp-rtUpgrade ocfs2-kmp-rtUpgrade kernel-azure-extraUpgrade kselftests-kmp-rtUpgrade kernel-source-azureUpgrade kernel-rt_debug | Aug 9, 2024 | Jun 20, 2024 |
| Ubuntu | — | Upgrade linux-intel-iotg-5.15 | Nov 19, 2024 | Jun 20, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Jun 20, 2024 |
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