{
  "cveId": "CVE-2026-80602",
  "url": "https://patchblox.com/security/cve/CVE-2026-80602",
  "summary": "CVE-2026-80602 is fixed in 48 products on 1 platform, first by ALAS2023-2026-2057, released August 17, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  perf/x86/amd/lbr: Fix kernel address leakage  A...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  perf/x86/amd/lbr: Fix kernel address leakage  A user-only branch stack can contain branches that originate from the kernel. As a result, kernel addresses are exposed to user space even when PERF_SAMPLE_BRANCH_USER is requested. On AMD processors supporting X86_FEATURE_AMD_LBR_V2, perf can still report SYSRET/ERET entries for which the branch-from addresses are in the kernel.  E.g.    $ perf record -e cycles -o - -j any,save_type,u -- \\         perf bench syscall basic --loop 1000 | \\         perf script -i - -F brstack|tr \u0027 \u0027 \u0027\\n\u0027| \\         grep -E \u00270x[89a-f][0-9a-f]{15}\u0027    ...   0xffffffff81001268/0x717a90a38f1a/M/-/-/0/ERET/NON_SPEC_CORRECT_PATH   0xffffffff81001268/0x717a90a39157/M/-/-/0/ERET/NON_SPEC_CORRECT_PATH   0xffffffff81001268/0x717a90a2c628/M/-/-/0/ERET/NON_SPEC_CORRECT_PATH   0xffffffff81001268/0x717a90a41b60/M/-/-/0/ERET/NON_SPEC_CORRECT_PATH   0xffffffff81001268/0x717a90a260db/M/-/-/0/ERET/NON_SPEC_CORRECT_PATH   0xffffffff81001268/0x717a90a260db/M/-/-/0/ERET/NON_SPEC_CORRECT_PATH   0xffffffff81001268/0x717a8bef1c30/M/-/-/0/ERET/NON_SPEC_CORRECT_PATH   0xffffffff81001268/0x717a8e4d3c90/M/-/-/0/ERET/NON_SPEC_CORRECT_PATH   ...  The reason is that the hardware filter only considers the privilege level applicable to the branch target. Extend software filtering to also validate the branch-from addresses against br_sel, so that any branch record whose branch-from address is in the kernel is dropped when PERF_SAMPLE_BRANCH_USER is requested.",
  "published": "2026-08-17T09:00:00Z",
  "severity": "important",
  "epss": 0.00215,
  "epssPercentile": 0.11892,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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