{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-72325",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-09T03:40:39.919Z",
        "datePublished": "2026-08-15T05:55:36.148Z",
        "dateUpdated": "2026-10-21T12:44:35.148Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:44:35.148Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/amd/core: Avoid enabling BRS from the SVM reload path\n\nBranch Sampling (BRS) and Last Branch Record (LBR) are mutually\nexclusive hardware features, and users of both are tracked via\ncpuc->lbr_users.\n\nWhen SVM is toggled on a CPU, the host perf events are reprogrammed to\nupdate the HostOnly filter bit (set when virtualization is enabled,\ncleared when it is disabled). On PerfMonV2-capable processors, this\nreprogramming is performed by calling amd_pmu_enable_all() to rewrite\nthe event selectors. However, amd_pmu_enable_all() also calls\namd_brs_enable_all(), which enables BRS whenever cpuc->lbr_users > 0.\nHaving active LBR events satisfies this gating on processors that have\nLBR but not BRS. The kernel then tries to set the BRS enable bit in\nDebugExtnCfg (MSR 0xc000010f). Since that bit is deprecated on such\nhardware, the write results in a #GP:\n\n  Call Trace:\n   <IRQ>\n   amd_pmu_enable_all+0x1d/0x90\n   amd_pmu_disable_virt+0x62/0xb0\n   kvm_arch_disable_virtualization_cpu+0xa/0x40 [kvm]\n   hardware_disable_nolock+0x1a/0x30 [kvm]\n   __flush_smp_call_function_queue+0x9b/0x410\n   __sysvec_call_function+0x18/0xc0\n   sysvec_call_function+0x69/0x90\n   </IRQ>\n   <TASK>\n   asm_sysvec_call_function+0x16/0x20\n  RIP: 0010:cpuidle_enter_state+0xc4/0x450\n   ? cpuidle_enter_state+0xb7/0x450\n   cpuidle_enter+0x29/0x40\n   cpuidle_idle_call+0xf5/0x160\n   do_idle+0x7b/0xe0\n   cpu_startup_entry+0x26/0x30\n   start_secondary+0x115/0x140\n   secondary_startup_64_no_verify+0x194/0x19b\n   </TASK>\n\nFix this by ensuring that BRS is not enabled from the event selector\nreprogramming path even when cpuc->lbr_users > 0."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/events/amd/core.c"
                    ],
                    "versions": [
                        {
                            "version": "bae19fdd7e9e759580ac4693d2df3bc23ab415d7",
                            "lessThan": "3b0aa139ba09a5b73c0f300e652076232f869f68",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bae19fdd7e9e759580ac4693d2df3bc23ab415d7",
                            "lessThan": "e9b1a7411a667539c2f55e720bbb5f623b526a32",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bae19fdd7e9e759580ac4693d2df3bc23ab415d7",
                            "lessThan": "7cc438c99bba324a0562b1bafa747b10f7e251df",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bae19fdd7e9e759580ac4693d2df3bc23ab415d7",
                            "lessThan": "46d0fd8535edce31f15e48d2de1bdee39a4850e5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bae19fdd7e9e759580ac4693d2df3bc23ab415d7",
                            "lessThan": "07c60dda9c059c09f83d42a3ebda2e7cc1cf3bc2",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/events/amd/core.c"
                    ],
                    "versions": [
                        {
                            "version": "5.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.97",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.12.97"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.18.40"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/3b0aa139ba09a5b73c0f300e652076232f869f68"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e9b1a7411a667539c2f55e720bbb5f623b526a32"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7cc438c99bba324a0562b1bafa747b10f7e251df"
                },
                {
                    "url": "https://git.kernel.org/stable/c/46d0fd8535edce31f15e48d2de1bdee39a4850e5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/07c60dda9c059c09f83d42a3ebda2e7cc1cf3bc2"
                }
            ],
            "title": "perf/x86/amd/core: Avoid enabling BRS from the SVM reload path",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}