perf tools: Use perf_env__get_cpu_topology() in machine__resolve()

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Summary

CVECVE-2026-80670
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 08:16:52 UTC
Updated2026-08-28 08:16:52 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: perf tools: Use perf_env__get_cpu_topology() in machine__resolve() machine__resolve() accesses env->cpu[al->cpu].socket_id after checking al->cpu >= 0 and env->cpu != NULL, but without validating al->cpu against env->nr_cpus_avail. Since al->cpu comes from the untrusted perf.data sample, a crafted file with a large CPU index causes an out-of-bounds heap read. Use perf_env__get_cpu_topology() which validates both NULL and bounds. Also bounds-check al->cpu before the cast to struct perf_cpu (int16_t): without this, values like 65536 silently truncate to 0, bypassing the accessor's internal check and returning CPU 0's topology.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0c4c4debb0adda4c18c158d95031dc2b9f637869 b9e8406651dcc1c19238aad11861a758683525b4 git Not specified
CNA Linux Linux affected 0c4c4debb0adda4c18c158d95031dc2b9f637869 eb266a14c16a93eb4db7b56a452d6be93f8bdcd4 git Not specified
CNA Linux Linux affected 0c4c4debb0adda4c18c158d95031dc2b9f637869 5484b43a0ec8231c36fba6ead654cb72dbba8b8f git Not specified
CNA Linux Linux affected 4.4 Not specified
CNA Linux Linux unaffected 4.4 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/eb266a14c16a93eb4db7b56a452d6be93f8bdcd4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5484b43a0ec8231c36fba6ead654cb72dbba8b8f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b9e8406651dcc1c19238aad11861a758683525b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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