CVE-2023-53793 Details
Description
In the Linux kernel, the following vulnerability has been resolved: perf tool x86: Fix perf_env memory leak Found by leak sanitizer: ``` ==1632594==ERROR: LeakSanitizer: detected memory leaks Direct leak of 21 byte(s) in 1 object(s) allocated from: #0 0x7f2953a7077b in __interceptor_strdup ../../../../src/libsanitizer/asan/asan_interceptors.cpp:439 #1 0x556701d6fbbf in perf_env__read_cpuid util/env.c:369 #2 0x556701d70589 in perf_env__cpuid util/env.c:465 #3 0x55670204bba2 in x86__is_amd_cpu arch/x86/util/env.c:14 #4 0x5567020487a2 in arch__post_evsel_config arch/x86/util/evsel.c:83 #5 0x556701d8f78b in evsel__config util/evsel.c:1366 #6 0x556701ef5872 in evlist__config util/record.c:108 #7 0x556701cd6bcd in test__PERF_RECORD tests/perf-record.c:112 #8 0x556701cacd07 in run_test tests/builtin-test.c:236 #9 0x556701cacfac in test_and_print tests/builtin-test.c:265 #10 0x556701cadddb in __cmd_test tests/builtin-test.c:402 #11 0x556701caf2aa in cmd_test tests/builtin-test.c:559 #12 0x556701d3b557 in run_builtin tools/perf/perf.c:323 #13 0x556701d3bac8 in handle_internal_command tools/perf/perf.c:377 #14 0x556701d3be90 in run_argv tools/perf/perf.c:421 #15 0x556701d3c3f8 in main tools/perf/perf.c:537 #16 0x7f2952a46189 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58 SUMMARY: AddressSanitizer: 21 byte(s) leaked in 1 allocation(s). ```
A memory leak vulnerability has been identified in the Linux kernel's perf tool, specifically within the x86 component. This issue affects the stable versions of the Linux kernel. The vulnerability arises from a failure to release memory after it is no longer needed, which can lead to increased memory usage and potential performance degradation. The leak was detected by the LeakSanitizer, which reported a direct leak of 21 bytes in one allocation. This memory leak occurs during the processing of CPU information, particularly when the perf tool evaluates AMD CPUs. The issue is introduced when the 'perf_env__read_cpuid' function is called to retrieve CPU details, but the allocated memory is not properly freed before the function exits.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed. The specific commit that fixes this issue is '99d4850062a84564f36923764bb93935ef2ed108', which is available in the Linux kernel stable tree.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Dec 9, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/010139bfc6bb9ddab81dbc2cf71cd3a9c28adc7f | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/75d65c1cc439606ada882755fd205d13c2c7907d | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/99d4850062a84564f36923764bb93935ef2ed108 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/f3daf02a41e3c11e1a473517a8a6169248fb8e7b | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
| Linux perf | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Dec 9, 2025 | New CVE Received | kernel.org |