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CVE-2026-99121 ipv4: avoid divide by zero in fib_rebalance

🗓️ 28 Oct 2026 10:34:37Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 3 Views

Divide by zero in Linux kernel fib_rebalance() during concurrent route changes.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-99121
28 Oct 202610:58
–circl
cve
CVE
CVE-2026-99121
28 Oct 202610:34
–cve
debiancve
Debian CVE
CVE-2026-99121
28 Oct 202618:47
–debiancve
euvd
EUVD
EUVD-2026-112021
28 Oct 202610:34
–euvd
nvd
NVD
CVE-2026-99121
28 Oct 202611:17
–nvd
osv_debian
osv_debian
DEBIAN-CVE-2026-99121
28 Oct 202611:17
–osv_debian
ptsecurity
Positive Technologies
PT-2026-128114
28 Oct 202600:00
–ptsecurity
ubuntucve
UbuntuCve
CVE-2026-99121
28 Oct 202600:00
–ubuntucve
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv4/fib_semantics.c"
    ],
    "versions": [
      {
        "version": "0e884c78ee19e902f300ed147083c28a0c6302f0",
        "lessThan": "5dac5c7ba8f5f3fb4bf29f2a2c3cb552f5b83c8f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0e884c78ee19e902f300ed147083c28a0c6302f0",
        "lessThan": "d5520e815c4b1427104ce1428ee23821f2aa824d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0e884c78ee19e902f300ed147083c28a0c6302f0",
        "lessThan": "5046d2880fec7d49ebed2fd2866747ee1d06ad71",
        "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/ipv4/fib_semantics.c"
    ],
    "versions": [
      {
        "version": "4.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.4",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.59",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.13",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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