Description (CNA)
In 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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0c4c4debb0adda4c18c158d95031dc2b9f637869 before b9e8406651dcc1c19238aad11861a758683525b4; affected 0c4c4debb0adda4c18c158d95031dc2b9f637869 before eb266a14c16a93eb4db7b56a452d6be93f8bdcd4; affected 0c4c4debb0adda4c18c158d95031dc2b9f637869 before 5484b43a0ec8231c36fba6ead654cb72dbba8b8f |
| Linux / Linux | affected 4.4; unaffected 0 before 4.4; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.