{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.7-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  perf/x86/intel: Improve validation and configuration of ACR masks  Currently there are several issues on the user space ACR mask validation and configuration. - The validation for user space ACR mask (attr.config2) is incomplete,   e.g., the ACR mask could include the index which belongs to another   ACR events group, but it's not validated. - An early return on an invalid ACR mask caused all subsequent ACR groups   to be skipped. - The stale hardware ACR mask (hw.config1) is not cleared before setting   new hardware ACR mask.  The following changes address all of the above issues. - Figure out the event index group of an ACR group. Any bits in the   user-space mask not present in the index group are now dropped. - Instead of an early return on invalid bits, drop only the invalid   portions and continue iterating through all ACR events to ensure full   configuration. - Explicitly clear the stale hardware ACR mask for each event prior to   writing the new configuration.  Besides, a non-leader event member of ACR group could be disabled in theory. This could cause bit-shifting errors in the acr_mask of remaining group members. But since ACR sampling requires all events to be active, this should not be a big concern in real use case. Add a \"FIXME\" comment to notice this risk.",
  "id": "DEBIAN-CVE-2026-53370",
  "modified": "2026-09-14T16:47:30.926990755Z",
  "published": "2026-07-19T09:17:02.153Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-53370"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-53370"
  ]
}