{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-22979",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-22979",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-01-23T15:24:01.340Z",
    "updatedAt": "2026-10-15T01:12:24.721Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "net: fix memory leak in skb_segment_list for GRO packets",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix memory leak in skb_segment_list for GRO packets\n\nWhen skb_segment_list() is called during packet forwarding, it handles\npackets that were aggregated by the GRO engine.\n\nHistorically, the segmentation logic in skb_segment_list assumes that\nindividual segments are split from a parent SKB and may need to carry\ntheir own socket memory accounting. Accordingly, the code transfers\ntruesize from the parent to the newly created segments.\n\nPrior to commit ed4cccef64c1 (\"gro: fix ownership transfer\"), this\ntruesize subtraction in skb_segment_list() was valid because fragments\nstill carry a reference to the original socket.\n\nHowever, commit ed4cccef64c1 (\"gro: fix ownership transfer\") changed\nthis behavior by ensuring that fraglist entries are explicitly\norphaned (skb->sk = NULL) to prevent illegal orphaning later in the\nstack. This change meant that the entire socket memory charge remained\nwith the head SKB, but the corresponding accounting logic in\nskb_segment_list() was never updated.\n\nAs a result, the current code unconditionally adds each fragment's\ntruesize to delta_truesize and subtracts it from the parent SKB. Since\nthe fragments are no longer charged to the socket, this subtraction\nresults in an effective under-count of memory when the head is freed.\nThis causes sk_wmem_alloc to remain non-zero, preventing socket\ndestruction and leading to a persistent memory leak.\n\nThe leak can be observed via KMEMLEAK when tearing down the networking\nenvironment:\n\nunreferenced object 0xffff8881e6eb9100 (size 2048):\n  comm \"ping\", pid 6720, jiffies 4295492526\n  backtrace:\n    kmem_cache_alloc_noprof+0x5c6/0x800\n    sk_prot_alloc+0x5b/0x220\n    sk_alloc+0x35/0xa00\n    inet6_create.part.0+0x303/0x10d0\n    __sock_create+0x248/0x640\n    __sys_socket+0x11b/0x1d0\n\nSince skb_segment_list() is exclusively used for SKB_GSO_FRAGLIST\npackets constructed by GRO, the truesize adjustment is removed.\n\nThe call to skb_release_head_state() must be preserved. As documented in\ncommit cf673ed0e057 (\"net: fix fraglist segmentation reference count\nleak\"), it is still required to correctly drop references to SKB\nextensions that may be overwritten during __copy_skb_header().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2eeab8c47c3c0276e0746bc382f405c9a236a5ad",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0b27828ebd1ed3107d7929c3737adbe862e99e74"
            },
            {
              "version": "fc126c1d51e9552eacd2d717b9ffe9262a8a4cd6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "88bea149db2057112af3aaf63534b24fab5858ab"
            },
            {
              "version": "ed4cccef64c1d0d5b91e69f7a8a6697c3a865486",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3264881431e308b9c72cb8a0159d57a56d67dd79"
            },
            {
              "version": "ed4cccef64c1d0d5b91e69f7a8a6697c3a865486",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c114a32a2e70b82d447f409f7ffcfa3058f9d5bd"
            },
            {
              "version": "ed4cccef64c1d0d5b91e69f7a8a6697c3a865486",
              "status": "affected",
              "versionType": "git",
              "lessThan": "238e03d0466239410b72294b79494e43d4fabe77"
            },
            {
              "version": "d225b0ac96dc40d7e8ae2bc227eb2c56e130975f",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5b3b67f731296027cceb3efad881ae281213f86f",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6.1.85",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.161"
            },
            {
              "version": "6.6.26",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.121"
            },
            {
              "version": "5.15.154",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.16"
            },
            {
              "version": "6.8.5",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.9"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.9"
            },
            {
              "version": "6.1.161",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.121",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.66",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}