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CVE-2026-74583 net/sched: cls_route: fix fastmap use-after-free on filter

🗓️ 21 Aug 2026 16:31:55Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 10 Views

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

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-74583
21 Aug 202623:29
circl
cve
CVE
CVE-2026-74583
21 Aug 202616:31
cve
debiancve
Debian CVE
CVE-2026-74583
21 Aug 202616:31
debiancve
euvd
EUVD
EUVD-2026-64005
21 Aug 202616:31
euvd
nvd
NVD
CVE-2026-74583
21 Aug 202617:16
nvd
osv
OSV
DEBIAN-CVE-2026-74583
21 Aug 202617:16
osv
ptsecurity
Positive Technologies
PT-2026-79404
21 Aug 202600:00
ptsecurity
redhatcve
RedhatCVE
CVE-2026-74583
21 Aug 202617:57
redhatcve
[
  {
    "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"
      },
      {
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        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
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        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1109c00547fc66df45b9ff923544be4c1e1bec13",
        "lessThan": "0e7a8cf8895b06d07c7311f028eba16ad742b9bc",
        "status": "affected",
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      },
      {
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      },
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        "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"
      }
    ]
  }
]

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