CVE-2026-80630

🗓️ 28 Aug 2026 06:48:46Reported by LinuxType

Linux sch_fq_codel qlen bug before restore causes parent deactivation and qfq wild memory access.

Reporter	Title	Published	Views	Family All 6
Cvelist	CVE-2026-80630 net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restoring qlen	28 Aug 202606:48	–	cvelist
Debian CVE	CVE-2026-80630	28 Aug 202606:48	–	debiancve
EUVD	EUVD-2026-67506	28 Aug 202606:48	–	euvd
NVD	CVE-2026-80630	28 Aug 202608:16	–	nvd
OSV	DEBIAN-CVE-2026-80630	28 Aug 202608:16	–	osv
Positive Technologies	PT-2026-82930	28 Aug 202600:00	–	ptsecurity

Vulners

CNA

Node

linux linux_kernelRange5.10.241–5.10.261

linux linux_kernelRange5.15.190–5.15.212

linux linux_kernelRange6.1.135–6.1.178

linux linux_kernelRange6.6.88–6.6.145

linux linux_kernelRange6.12.24–6.12.97

linux linux_kernelRange5.4.297–5.5

linux linux_kernelRange6.13.12–6.14

linux linux_kernelRange6.14.3–6.15

linux linux_kernelRange6.15–5.10.261

linux linux_kernelRange5.11.0–5.15.212

linux linux_kernelRange5.16.0–6.1.178

linux linux_kernelRange6.2.0–6.6.145

linux linux_kernelRange6.7.0–6.12.97

linux linux_kernelRange6.13.0–6.18.40

linux linux_kernelRange6.19.0–7.1.5

linux linux_kernelRange7.2.0≥

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/sched/sch_fq_codel.c"
    ],
    "versions": [
      {
        "version": "cc71a757da78dd4aa1b4a9b19cb011833730ccf2",
        "lessThan": "3e515188393e62a718ccebee651ee74514104ff6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb450",
        "lessThan": "20dd591d8f951e1e6aca5052be8785e6181055e2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "829c49b6b2ff45b043739168fd1245e4e1a91a30",
        "lessThan": "94a5f1efdefb01f82cd228bf4e7ef1e8fc075c80",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2f9761a94bae33d26e6a81b31b36e7d776d93dc1",
        "lessThan": "acc08a0c7f37ebb1901144e03a7cba7d4afd9203",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4d55144b12e742404bb3f8fee6038bafbf45619d",
        "lessThan": "7c09843fd2b44d9bf0de798683861d1aecd62a08",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "342debc12183b51773b3345ba267e9263bdfaaef",
        "lessThan": "0500af8630c3253f0dde879bd3a73a06bb2f2b3f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "342debc12183b51773b3345ba267e9263bdfaaef",
        "lessThan": "af54df2f44d9605614bc7ed96640302a240a9a62",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "342debc12183b51773b3345ba267e9263bdfaaef",
        "lessThan": "097f6fc7b1ae362dd7a9444b2572162fda73b284",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7a742a9506849d1c1aa71e36c89855ceddc7d58e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e73c838c80dccb9e4f19becc11d9f3cb4a27d483",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.10.241",
        "lessThan": "5.10.261",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "5.15.190",
        "lessThan": "5.15.212",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.1.135",
        "lessThan": "6.1.178",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.6.88",
        "lessThan": "6.6.145",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.12.24",
        "lessThan": "6.12.97",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "5.4.297",
        "lessThan": "5.5",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.13.12",
        "lessThan": "6.14",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.14.3",
        "lessThan": "6.15",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/sched/sch_fq_codel.c"
    ],
    "versions": [
      {
        "version": "6.15",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.15",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.261",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.212",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.178",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.145",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.97",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.40",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.5",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/20dd591d8f951e1e6aca5052be8785e6181055e2
git	www.git.kernel.org/stable/c/af54df2f44d9605614bc7ed96640302a240a9a62
git	www.git.kernel.org/stable/c/94a5f1efdefb01f82cd228bf4e7ef1e8fc075c80
git	www.git.kernel.org/stable/c/3e515188393e62a718ccebee651ee74514104ff6
git	www.git.kernel.org/stable/c/097f6fc7b1ae362dd7a9444b2572162fda73b284
git	www.git.kernel.org/stable/c/7c09843fd2b44d9bf0de798683861d1aecd62a08
git	www.git.kernel.org/stable/c/acc08a0c7f37ebb1901144e03a7cba7d4afd9203
git	www.git.kernel.org/stable/c/0500af8630c3253f0dde879bd3a73a06bb2f2b3f

28 Aug 2026 08:16Current

5.9Medium risk

Vulners AI Score5.9

EPSS0.00176