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CVE-2026-80862 (GCVE-0-2026-80862)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:55 – Updated: 2026-09-04 15:55
VLAI
Title
nvme-tcp: fix usage of page_frag_cache
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix usage of page_frag_cache nvme uses page_frag_cache to preallocate PDU for each preallocated request of block device. Block devices are created in parallel threads, consequently page_frag_cache is used in not thread-safe manner. That leads to incorrect refcounting of backstore pages and premature free. That can be catched by !sendpage_ok inside network stack: WARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310. tcp_sendmsg_locked+0x782/0xce0 tcp_sendmsg+0x27/0x40 sock_sendmsg+0x8b/0xa0 nvme_tcp_try_send_cmd_pdu+0x149/0x2a0 Then random panic may occur. Fix that by serializing the usage of page_frag_cache.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4e893ca8117022de68ce1b61c0309e3d17bb8a25 , < d19f98c79f1b7e09e4cdf5c20d626e571e487467 (git)
Affected: 4e893ca8117022de68ce1b61c0309e3d17bb8a25 , < 64561afb42d8390695bf810d9bbd087cbca00291 (git)
Affected: 4e893ca8117022de68ce1b61c0309e3d17bb8a25 , < 0a9750263ffacbbd2048a391fd4bd22e2146c57d (git)
Affected: 4e893ca8117022de68ce1b61c0309e3d17bb8a25 , < 6e4cf281558709b92ec2ca3054fe2ffc69266ef9 (git)
Affected: 4e893ca8117022de68ce1b61c0309e3d17bb8a25 , < 36ac05f7cfd59d90c597071304b14e98090d5dd1 (git)
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Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.108 , ≤ 6.12.* (semver)
Unaffected: 6.18.49 , ≤ 6.18.* (semver)
Unaffected: 7.1.13 , ≤ 7.1.* (semver)
Unaffected: 7.2.3 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/tcp.c"
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              "versionType": "semver"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: fix usage of page_frag_cache\n\nnvme uses page_frag_cache to preallocate PDU for each preallocated request\nof block device. Block devices are created in parallel threads,\nconsequently page_frag_cache is used in not thread-safe manner.\nThat leads to incorrect refcounting of backstore pages and premature free.\n\nThat can be catched by !sendpage_ok inside network stack:\n\nWARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310.\n\ttcp_sendmsg_locked+0x782/0xce0\n\ttcp_sendmsg+0x27/0x40\n\tsock_sendmsg+0x8b/0xa0\n\tnvme_tcp_try_send_cmd_pdu+0x149/0x2a0\nThen random panic may occur.\n\nFix that by serializing the usage of page_frag_cache."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:55:16.653Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/d19f98c79f1b7e09e4cdf5c20d626e571e487467"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/0a9750263ffacbbd2048a391fd4bd22e2146c57d"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e4cf281558709b92ec2ca3054fe2ffc69266ef9"
        },
        {
          "url": "https://git.kernel.org/stable/c/36ac05f7cfd59d90c597071304b14e98090d5dd1"
        }
      ],
      "title": "nvme-tcp: fix usage of page_frag_cache",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80862",
    "datePublished": "2026-09-04T15:55:16.653Z",
    "dateReserved": "2026-08-26T14:34:25.798Z",
    "dateUpdated": "2026-09-04T15:55:16.653Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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      "date": "2026-09-14",
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    },
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    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-10T01:50:23Z",
      "cve": "CVE-2026-80862",
      "id": "CVE-2026-80862",
      "initial_release_date": "2026-09-05T00:25:51Z",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "143",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80862",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80862.json",
      "version": "4"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.