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Vulnerability · Published Aug 28, 2026 · Assigned by Linux

CVE-2026-80602perf/x86/amd/lbr: Fix kernel address leakage

Unrated

In plain English

A security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 88.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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 ' ' '\n'| \ grep -E '0x[89a-f][0-9a-f]{15}' ... 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-80602
Debian:13linux6.12.100-1DEBIAN-CVE-2026-80602
Debian:14linux7.1.5-1DEBIAN-CVE-2026-80602
Ubuntu:24.04:LTSlinux6.8.0-147.147UBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux7.0.0-38.38UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-aws6.8.0-1067.70UBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-aws7.0.0-1014.14UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-aws-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure6.8.0-1071.79UBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-azure7.0.0-1017.17UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1017.17~24.04.1UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1069.76UBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1016.16UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-gcp6.8.0-1071.79UBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-gcp7.0.0-1014.14UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-gke6.8.0-1066.74UBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-gke7.0.0-1008.9UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1052.56UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-38.38~24.04.4UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-ibm6.8.0-1067.68UBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-ibm7.0.0-1015.15UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-147.147.1UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1024.25~24.04.1UBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2022.23UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1015.15UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-oracle6.8.0-1064.67UBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-oracle7.0.0-1013.13UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-realtime7.0.0-38.38.1UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-80602
Ubuntu:26.04:LTSlinux-riscv7.0.0-38.38.1UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-38.38.1~24.04.1UBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-80602
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-80602
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-80602

Affected products (as reported)

VendorProductVersions
Linux Linux f4f925dae7419fc7a10af539c073871927ce3a24 – before 5adfec05e804ce4bd3368b75df5e5b7b40ee960bf4f925dae7419fc7a10af539c073871927ce3a24 – before 5be478c1e08981ca91b34de310d7e2638171d9d8f4f925dae7419fc7a10af539c073871927ce3a24 – before 208ecca408b1707ad86ea247d3d3e09d3606fc13f4f925dae7419fc7a10af539c073871927ce3a24 – before 5ab0eba9c8819506bcb72348fd701f8a9006f95ef4f925dae7419fc7a10af539c073871927ce3a24 – before fb3b76b5ad2ebad63dd76f8b65b624eaf638b73ff4f925dae7419fc7a10af539c073871927ce3a24 – before 2a892294b83f541115c94b0bb637f39bef187657
Linux Linux 6.1

References