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qede: fix off-by-one in BD ring consumption on build_skb failure

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: qede: fix off-by-one in BD ring consumption on build_skb failure qede_rx_build_skb() and qede_tpa_rx_build_skb() do not check for a NULL return from qede_build_skb(). When it returns NULL under memory pressure, the functions still consume a BD from the ring before returning NULL. The callers then recycle additional BDs, resulting in one extra BD being consumed (off-by-one). This desynchronizes the BD ring, which can corrupt DMA page reference counts and lead to SLUB freelist corruption. Commit 4e910dbe3650 ("qede: confirm skb is allocated before using") added a NULL check inside qede_build_skb() to prevent a NULL pointer dereference, but did not address the missing NULL checks in the callers, making this off-by-one reachable. Fix this by adding NULL checks for the return value of qede_build_skb() in both qede_rx_build_skb() and qede_tpa_rx_build_skb(), returning NULL immediately before any BD ring manipulation.

Announced Group revision 1
Original source ↗

CVE-2026-72339

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-2026-72339

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": "8a8633978b842c88fbcfe00d4e5dde96048f630e",
        "lessThan": "ecc05d4b20220a09c9c69584fc46ca55248a374a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e",
        "lessThan": "07be8b8adf91b7ada4c3dacce064d572a6066421",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e",
        "lessThan": "1624aa100c0b218181aa74e3696a389b509298cb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e",
        "lessThan": "0bf78df2d3ecb1f4964ff42a7327d25845955153",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e",
        "lessThan": "814a5edac8c9fc04051808d5faaa93768e989281",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e",
        "lessThan": "b066420e57f3402a52c998678b4678252ac9bb63",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e",
        "lessThan": "982d6d6bc059c5dff37a2201c2f08c14bcfcbd20",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e",
        "lessThan": "a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/qlogic/qede/qede_fp.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.18"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.18",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/qlogic/qede/qede_fp.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72339

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#33027 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-72339 · Revision 1Source updated