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CVE-2026-74656 ipv4: fix use-after-free in fib_nhc_update_mtu()

🗓️ 22 Aug 2026 15:32:30Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 3 Views

Use-after-free in Linux kernel ipv4 fib_nhc_update_mtu() due to missing fnhe_lock during RCU walk.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-74656
22 Aug 202615:32
cve
debiancve
Debian CVE
CVE-2026-74656
22 Aug 202615:32
debiancve
euvd
EUVD
EUVD-2026-64593
22 Aug 202615:32
euvd
nvd
NVD
CVE-2026-74656
22 Aug 202616:16
nvd
osv
OSV
DEBIAN-CVE-2026-74656
22 Aug 202619:47
osv
ptsecurity
Positive Technologies
PT-2026-79661
22 Aug 202600:00
ptsecurity
[
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    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/route.h",
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      "net/ipv4/route.c"
    ],
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        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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