{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f735eebe55f8f61758fe014bd0b02ab50b059e4d"
            },
            {
              "fixed": "89bd8215e25aa6999cc51696da418e0d422bc5e0"
            },
            {
              "fixed": "00731bd7e18f182a32ca54d6b176eaa470b51ed7"
            },
            {
              "fixed": "c0cafe24d3f6534294c4b2bc2d47734ff7cbd313"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.16.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53162.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmemcg: use round-robin victim selection in refill_stock\n\nHarry Yoo reported that get_random_u32_below() is not safe to call in the\nnmi context and memcg charge draining can happen in nmi context.\n\nMore specifically get_random_u32_below() is neither reentrant- nor\nNMI-safe: it acquires a per-cpu local_lock via local_lock_irqsave() on the\nbatched_entropy_u32 state.  An NMI that lands on a CPU mid-update of the\nChaCha batch state and recurses into the random subsystem would corrupt\nthat state.  The memcg_stock local_trylock prevents re-entry on the percpu\nstock itself, but cannot protect an unrelated subsystem's per-cpu lock.\n\nReplace the random pick with a per-cpu round-robin counter stored in\nmemcg_stock_pcp and serialized by the same local_trylock that already\nguards cached[] and nr_pages[].  No atomics, no random calls, no extra\nlocks needed.",
  "id": "CVE-2026-53162",
  "modified": "2026-07-08T05:36:04.740157134Z",
  "published": "2026-06-25T08:38:43.453Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00731bd7e18f182a32ca54d6b176eaa470b51ed7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89bd8215e25aa6999cc51696da418e0d422bc5e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0cafe24d3f6534294c4b2bc2d47734ff7cbd313"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53162.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53162"
    },
    {
      "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": "memcg: use round-robin victim selection in refill_stock"
}