{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e9d4e1ee788097484606c32122f146d802a9c5fb"
            },
            {
              "fixed": "72fb67f6e0e5d78e4f34cf9929d1afdb0fd54203"
            },
            {
              "fixed": "0a90e268cce7023f34087bfa4affb42e29ff5f45"
            },
            {
              "fixed": "5ec8f629a300cc40e746d6178f724bdff7683fa7"
            },
            {
              "fixed": "a3417097fb107cea3358b19bcbb4eb655fd67f8c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.3.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93240.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmemcg: make the v1 soft limit knob inert\n\nThe v1 soft limit has been deprecated since v6.12 and nobody has reported\ndepending on it.  Start the removal by decoupling the interface from the\nimplementation: keep memory.soft_limit_in_bytes, but ignore writes to it\nand always report the maximum value on read similar to what\nmemory.kmem.limit_in_bytes already does.\n\nWrites are still parsed, so malformed input keeps returning -EINVAL.  The\nknob now also behaves the same everywhere: it used to return -EOPNOTSUPP\non PREEMPT_RT, where soft limit reclaim has always been disabled.\n\nThis also fixes the syzbot report linked below.  Soft limit reclaim is the\nonly caller that runs shrink_lruvec() from kswapd against a specific\nmemcg, so it is the only way to reach lru_gen_shrink_lruvec() and in turn\nset_mm_walk(), which warns when called from kswapd.",
  "id": "CVE-2026-93240",
  "modified": "2026-09-27T03:30:16.464589429Z",
  "published": "2026-09-24T15:34:32.134Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a90e268cce7023f34087bfa4affb42e29ff5f45"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ec8f629a300cc40e746d6178f724bdff7683fa7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72fb67f6e0e5d78e4f34cf9929d1afdb0fd54203"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3417097fb107cea3358b19bcbb4eb655fd67f8c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93240.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93240"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "memcg: make the v1 soft limit knob inert"
}