{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "bd27568117664b8b3e259721393df420ed51f57b"
            },
            {
              "fixed": "656f35b463995bee024d948440128230aacd81e1"
            },
            {
              "fixed": "3a696e84a8b1fafdd774bb30d62919faf844d9e4"
            },
            {
              "fixed": "35f7914e54fe7f13654c22ee045b05e4b6d8062b"
            },
            {
              "fixed": "4c759446046500a1a6785b25725725c3ff087ace"
            },
            {
              "fixed": "4b9ce671960627b2505b3f64742544ae9801df97"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.131"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.80"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.21"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31528.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Make sure to use pmu_ctx-\u003epmu for groups\n\nOliver reported that x86_pmu_del() ended up doing an out-of-bound memory access\nwhen group_sched_in() fails and needs to roll back.\n\nThis *should* be handled by the transaction callbacks, but he found that when\nthe group leader is a software event, the transaction handlers of the wrong PMU\nare used. Despite the move_group case in perf_event_open() and group_sched_in()\nusing pmu_ctx-\u003epmu.\n\nTurns out, inherit uses event-\u003epmu to clone the events, effectively undoing the\nmove_group case for all inherited contexts. Fix this by also making inherit use\npmu_ctx-\u003epmu, ensuring all inherited counters end up in the same pmu context.\n\nSimilarly, __perf_event_read() should use equally use pmu_ctx-\u003epmu for the\ngroup case.",
  "id": "CVE-2026-31528",
  "modified": "2026-07-08T05:39:14.834310979Z",
  "published": "2026-04-22T13:54:41.180Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35f7914e54fe7f13654c22ee045b05e4b6d8062b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a696e84a8b1fafdd774bb30d62919faf844d9e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b9ce671960627b2505b3f64742544ae9801df97"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c759446046500a1a6785b25725725c3ff087ace"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/656f35b463995bee024d948440128230aacd81e1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31528.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31528"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "perf: Make sure to use pmu_ctx-\u003epmu for groups"
}