{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f53c723902d1ac5f0b0a11d7c9dcbff748dde74e"
            },
            {
              "fixed": "33e1b0d25ca0d2818c635ff80e6aa0d295e08a98"
            },
            {
              "fixed": "bbca7cc3b2b4b10afbfee99b81d9ee78f5423046"
            },
            {
              "fixed": "3f4c3919baf0944ad96580467c302bc6c7758b00"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.16.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68426.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix stale skb-\u003eprev after async crypto steals a GSO segment\n\nskb_gso_segment() leaves the segment list head with -\u003eprev pointing at\nthe last segment, an invariant validate_xmit_skb_list() relies on when\nit sets its tail pointer (tail = skb-\u003eprev).\n\nWhen validate_xmit_xfrm() walks a GSO list and some segments are stolen\nby async crypto (-\u003exmit() returns -EINPROGRESS), those segments are\nunlinked from the list but the head -\u003eprev is never updated.  If the\nlast segment is the one stolen, the returned head still has -\u003eprev\npointing at it, even though it is now owned by the crypto engine and may\nbe freed.  validate_xmit_skb_list() later does tail-\u003enext = skb, writing\nthrough that stale pointer -- a use-after-free.\n\nRepoint skb-\u003eprev at the last retained segment before returning.",
  "id": "CVE-2026-68426",
  "modified": "2026-08-18T03:30:50.678529802Z",
  "published": "2026-08-10T12:04:46.945Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33e1b0d25ca0d2818c635ff80e6aa0d295e08a98"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f4c3919baf0944ad96580467c302bc6c7758b00"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bbca7cc3b2b4b10afbfee99b81d9ee78f5423046"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68426.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68426"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "xfrm: fix stale skb-\u003eprev after async crypto steals a GSO segment"
}