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NTB: ntb_netdev: Preserve RX queue depth on allocation failure

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: NTB: ntb_netdev: Preserve RX queue depth on allocation failure ntb_netdev_rx_handler() hands the received skb to the network stack before allocating its replacement. If the allocation fails, nothing is reposted. Every failure therefore takes one buffer out of the RX queue while the interface remains up, and enough failures eventually stall reception. A retry path could refill the queue later, but ntb_netdev has none. Allocate the replacement first instead. If that fails, drop the packet and repost the same skb. This keeps the queue full and lets packet delivery resume as soon as memory is available again.

Announced Source revision 1
Original source ↗

CVE-2026-74626

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-2026-74626

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": "548c237c0a9972df5d1afaca38aa733ee577128d",
        "lessThan": "6d7f8a23c130d768c0976c2578b214353674e18f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "548c237c0a9972df5d1afaca38aa733ee577128d",
        "lessThan": "18781cc0bfb5c7f2a51ac6d678a28f101b7c35c5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "548c237c0a9972df5d1afaca38aa733ee577128d",
        "lessThan": "272df0fbe6f3e04e22bc67fbdd9ac24586b942f4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "548c237c0a9972df5d1afaca38aa733ee577128d",
        "lessThan": "fcaf8ba7e56bb73319ac107a63b907d59536192c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "548c237c0a9972df5d1afaca38aa733ee577128d",
        "lessThan": "3f2a15f33f86f7bd5b920669fd40c06725d72a1e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "548c237c0a9972df5d1afaca38aa733ee577128d",
        "lessThan": "a4e340971fe8ccd245d206db4d43b2a0eec240bd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "548c237c0a9972df5d1afaca38aa733ee577128d",
        "lessThan": "755fd7843f300d724caceabdf9bb13adc8701540",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "548c237c0a9972df5d1afaca38aa733ee577128d",
        "lessThan": "d2121faf133ac3bf9531b53a7e21273649a08517",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/ntb_netdev.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": "5.10.267",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.218",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.185",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.154",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.106",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.46",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/ntb_netdev.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74626

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#34247 · Revision 1
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Publisher date
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