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NTB: ntb_transport: Reject oversized TX buffers

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: NTB: ntb_transport: Reject oversized TX buffers ntb_process_tx() handles an oversized buffer by calling tx_handler() with a NULL data pointer and returning success. ntb_netdev therefore neither frees the skb in its completion callback nor takes its enqueue error path, leaking it. Reject oversized buffers in ntb_transport_tx_enqueue() before acquiring a queue entry and return -EMSGSIZE. The caller retains ownership of the buffer, and the preceding netdev patch frees the skb when enqueue returns this permanent error.

Announced Group revision 1
Original source ↗

CVE-2026-80987

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-80987

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "fce8a7bb5b4bfb8a27324703fd5b002ee9247e90",
        "lessThan": "4890152a3069f5cb58cc24b08cfd5fe95e568fa1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fce8a7bb5b4bfb8a27324703fd5b002ee9247e90",
        "lessThan": "668aa3238548584ca9772da9cf43ae8c2389bbf1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fce8a7bb5b4bfb8a27324703fd5b002ee9247e90",
        "lessThan": "9b0fa8a9e1057614a533cc3f18b17f82aab028d8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fce8a7bb5b4bfb8a27324703fd5b002ee9247e90",
        "lessThan": "b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fce8a7bb5b4bfb8a27324703fd5b002ee9247e90",
        "lessThan": "a7f22105a7df8c7fd74d0af27ace6fa94fe03d87",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fce8a7bb5b4bfb8a27324703fd5b002ee9247e90",
        "lessThan": "6b6bbc6c878d64eacc60877df49fce7b1b6a08d0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fce8a7bb5b4bfb8a27324703fd5b002ee9247e90",
        "lessThan": "75a604e9f1cfdebda421062fdf42225ca32154cd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fce8a7bb5b4bfb8a27324703fd5b002ee9247e90",
        "lessThan": "a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/ntb/ntb_transport.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/ntb/ntb_transport.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80987

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#34944 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-80987 · Revision 1Source updated