CVE-2026-74583

🗓️ 21 Aug 2026 16:31:55Reported by LinuxType

Use-after-free in Linux kernel cls_route fastmap cache due to race between reader and writer.

Reporter	Title	Published	Views	Family All 7
Circl	CVE-2026-74583	21 Aug 202623:29	–	circl
Cvelist	CVE-2026-74583 net/sched: cls_route: fix fastmap use-after-free on filter	21 Aug 202616:31	–	cvelist
Debian CVE	CVE-2026-74583	21 Aug 202616:31	–	debiancve
EUVD	EUVD-2026-64005	21 Aug 202616:31	–	euvd
NVD	CVE-2026-74583	21 Aug 202617:16	–	nvd
Positive Technologies	PT-2026-79404	21 Aug 202600:00	–	ptsecurity
RedhatCVE	CVE-2026-74583	21 Aug 202617:57	–	redhatcve

Vulners

CNA

Node

linux linux_kernelRange3.18–5.10.265

linux linux_kernelRange5.11.0–5.15.216

linux linux_kernelRange5.16.0–6.1.183

linux linux_kernelRange6.2.0–6.6.152

linux linux_kernelRange6.7.0–6.12.104

linux linux_kernelRange6.13.0–6.18.45

linux linux_kernelRange6.19.0–7.1.9

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/cls_route.c"
    ],
    "versions": [
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
        "lessThan": "7897198b26445b4009a057bda1986b94a99e5d5f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
        "lessThan": "820f083c294ad6d319c02a7d43294f2ed2565139",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
        "lessThan": "5ec9001be6d0eb527251125632ec8fe88278897f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
        "lessThan": "b969984b2bdc85d721ce4047cd270cd37ec705a2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
        "lessThan": "a17f636c9330eac879822ce29f998e5abd1b72c1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
        "lessThan": "0e7a8cf8895b06d07c7311f028eba16ad742b9bc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
        "lessThan": "ae9aff87025219005a2d16b4fe83d6f24643e50d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
        "lessThan": "47d7f7051253bdc02b1d245d87e38f16d31a74df",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/sched/cls_route.c"
    ],
    "versions": [
      {
        "version": "3.18",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.18",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.265",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.216",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.183",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.152",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.104",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.45",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.9",
        "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/7897198b26445b4009a057bda1986b94a99e5d5f
git	www.git.kernel.org/stable/c/5ec9001be6d0eb527251125632ec8fe88278897f
git	www.git.kernel.org/stable/c/ae9aff87025219005a2d16b4fe83d6f24643e50d
git	www.git.kernel.org/stable/c/0e7a8cf8895b06d07c7311f028eba16ad742b9bc
git	www.git.kernel.org/stable/c/b969984b2bdc85d721ce4047cd270cd37ec705a2
git	www.git.kernel.org/stable/c/820f083c294ad6d319c02a7d43294f2ed2565139
git	www.git.kernel.org/stable/c/a17f636c9330eac879822ce29f998e5abd1b72c1
git	www.git.kernel.org/stable/c/47d7f7051253bdc02b1d245d87e38f16d31a74df

21 Aug 2026 17:16Current

5.5Medium risk

Vulners AI Score5.5