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net/sched: sch_taprio: Replace direct dequeue call with peek and qdisc_dequeue_peeked

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_taprio: Replace direct dequeue call with peek and qdisc_dequeue_peeked When taprio's software path peeks a non-work-conserving child qdisc, the child stashes the peeked skb in its gso_skb; taprio_dequeue_from_txq() then takes the packet with a direct child ->dequeue() call, which ignores that stash, orphans the peeked skb and desyncs the child's qlen/backlog. With a qfq child this re-enters the child on an emptied list and dereferences NULL, panicking the kernel from softirq on ordinary egress. Take the packet through qdisc_dequeue_peeked(), as sch_red and sch_sfb now do. The helper returns the child's stashed skb first and is a no-op when there is none, so a work-conserving child is unaffected and the gated path now consumes the skb whose length was charged to the budget.

Announced Source revision 1
Original source ↗

CVE-2026-72035

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-2026-72035

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": "5a781ccbd19e4664babcbe4b4ead7aa2b9283d22",
        "lessThan": "51f8af240aed903e988755af33d7491030b50ae9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a781ccbd19e4664babcbe4b4ead7aa2b9283d22",
        "lessThan": "17ab5f76f3899f67e5569722f334591f4b88b17b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a781ccbd19e4664babcbe4b4ead7aa2b9283d22",
        "lessThan": "f60d5c12e0551012cee5c272b0bcbcc78f7bb506",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a781ccbd19e4664babcbe4b4ead7aa2b9283d22",
        "lessThan": "6ee5a7665a9080bcb05d703bf981a579436fd05e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a781ccbd19e4664babcbe4b4ead7aa2b9283d22",
        "lessThan": "18d580cb00c55805633bae45e90cf22ed6b8e424",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a781ccbd19e4664babcbe4b4ead7aa2b9283d22",
        "lessThan": "e2b7ee61989f2d39df6c2cc06f9db1aea69bdb09",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a781ccbd19e4664babcbe4b4ead7aa2b9283d22",
        "lessThan": "2dcebbd1ad2e180fe7b98bf346ced69a872e11e6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a781ccbd19e4664babcbe4b4ead7aa2b9283d22",
        "lessThan": "e056e1dfcddca877dd46d704e8ec9860cfc9ec44",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/sched/sch_taprio.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.20"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.20",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.266",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.217",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.184",
        "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": [
      "net/sched/sch_taprio.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72035

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41842 · Revision 1
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Publisher date
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