Ubuntu: (CVE-2022-48713): linux-intel-iotg-5.15 vulnerability

Ubuntu: (CVE-2022-48713): linux-intel-iotg-5.15 vulnerability

Severity

4

CVSS

(AV:L/AC:M/Au:N/C:P/I:P/A:P)

Published

06/20/2024

Created

11/21/2024

Added

11/19/2024

Modified

11/19/2024

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.

Solution(s)

• ubuntu-upgrade-linux-intel-iotg-5-15

References

• https://attackerkb.com/topics/cve-2022-48713
• CVE - 2022-48713
• https://git.kernel.org/linus/1d9093457b243061a9bba23543c38726e864a643
• https://git.kernel.org/stable/c/1d9093457b243061a9bba23543c38726e864a643
• https://git.kernel.org/stable/c/456f041e035913fcedb275aff6f8a71dfebcd394
• https://git.kernel.org/stable/c/e83d941fd3445f660d2f43647c580a320cc384f6
• https://git.kernel.org/stable/c/feffb6ae2c80b9a8206450cdef90f5943baced99
• https://www.cve.org/CVERecord?id=CVE-2022-48713

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