CVE-2026-93240

{
  "id": "CVE-2026-93240",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-24T16:17:19.827",
  "lastModified": "2026-10-21T13:21:05.993",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "Documentation/admin-guide/cgroup-v1/memory.rst",
            "mm/memcontrol-v1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "e9d4e1ee788097484606c32122f146d802a9c5fb",
              "lessThan": "bf75f14d755f9cfbb246e6cc011b53cdd5142de3",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "e9d4e1ee788097484606c32122f146d802a9c5fb",
              "lessThan": "72fb67f6e0e5d78e4f34cf9929d1afdb0fd54203",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "e9d4e1ee788097484606c32122f146d802a9c5fb",
              "lessThan": "0a90e268cce7023f34087bfa4affb42e29ff5f45",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "e9d4e1ee788097484606c32122f146d802a9c5fb",
              "lessThan": "5ec8f629a300cc40e746d6178f724bdff7683fa7",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "e9d4e1ee788097484606c32122f146d802a9c5fb",
              "lessThan": "a3417097fb107cea3358b19bcbb4eb655fd67f8c",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "Documentation/admin-guide/cgroup-v1/memory.rst",
            "mm/memcontrol-v1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.3",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.3",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.110",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.51",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.5",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0a90e268cce7023f34087bfa4affb42e29ff5f45",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5ec8f629a300cc40e746d6178f724bdff7683fa7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/72fb67f6e0e5d78e4f34cf9929d1afdb0fd54203",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a3417097fb107cea3358b19bcbb4eb655fd67f8c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bf75f14d755f9cfbb246e6cc011b53cdd5142de3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}