{
  "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-2026-89487",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89487",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-11T19:43:40.776Z",
    "updatedAt": "2026-10-19T08:47:37.837Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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": "openvswitch: only skb_tx_error() a packet we are about to drop",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: only skb_tx_error() a packet we are about to drop\n\nqueue_userspace_packet() borrows the packet skb -- it only copies it into\na private netlink message (user_skb) and does not own it; on return\ndo_execute_actions() keeps forwarding it through the flow's remaining\nactions. Its error path nevertheless calls skb_tx_error(skb), which via\nskb_zcopy_clear() does skb_shinfo(skb)->flags &= ~SKBFL_ALL_ZEROCOPY,\nstripping SKBFL_SHARED_FRAG from that live skb (skb_tx_error()'s kerneldoc\nsays \"skb must be freed afterwards\").\n\nFor a MSG_ZEROCOPY skb carrying page-cache frags, SKBFL_SHARED_FRAG is\nwhat makes esp_input() skb_cow_data() before in-place AEAD; once it is\nstripped a later local ESP-in-UDP delivery decrypts in place over pages\nthe sender does not own -- an unprivileged page-cache write (the\n\"Fragnesia\" primitive).\ndo_execute_actions() ignores output_userspace()'s return value, so any\naction after a failed USERSPACE upcall inherits the stripped skb.\n\nMove the skb_tx_error() to the flow-miss drop path - the \"default\"\nbranch of ovs_dp_process_packet()'s switch(error), before kfree_skb().\n\nThe call has been here since commit 36d5fe6a0007 (\"core, nfqueue,\nopenvswitch: Orphan frags in skb_zerocopy and handle errors\") but was\nharmless until esp_input() began relying on SKBFL_SHARED_FRAG to gate\nin-place decrypt; only then did stripping it on a still-forwarded skb\nbecome a page-cache write primitive.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "36d5fe6a000790f56039afe26834265db0a3ad4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5de5d554141a15b3f1f5c978fd9f7f4fd6d0600a"
            },
            {
              "version": "36d5fe6a000790f56039afe26834265db0a3ad4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "48db11e115d1b232edc5591604adc6eda95cd545"
            },
            {
              "version": "36d5fe6a000790f56039afe26834265db0a3ad4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4477222e2916a18e273edc139c955ade6bbb7a69"
            },
            {
              "version": "36d5fe6a000790f56039afe26834265db0a3ad4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4d5c460ef8754be1d43b16dbf02695b008b207d6"
            },
            {
              "version": "36d5fe6a000790f56039afe26834265db0a3ad4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6767d70cf46f65807a6a4c4406a518e6c12e36ae"
            },
            {
              "version": "36d5fe6a000790f56039afe26834265db0a3ad4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e41a59fc056f63a7a1f42788913c53cc48d744aa"
            },
            {
              "version": "36d5fe6a000790f56039afe26834265db0a3ad4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5d85eef222cfd28e73deed7402c100229e8b9e6e"
            },
            {
              "version": "36d5fe6a000790f56039afe26834265db0a3ad4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0dbc2398fca3bb33eda963849f865ddb1b3aa05e"
            },
            {
              "version": "c5f0c0e7525443add533495e93ba8de6feab2396",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "1674b4bf3eea3cac51b70778e89f8025f7cfe695",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "3.10.51",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.11"
            },
            {
              "version": "3.12.40",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.13"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.14"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.109",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.50",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}