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CVE-2026-99077 ipv4: udp: Create exceptions before socket matching

🗓️ 23 Oct 2026 12:23:22Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 8 Views

Linux kernel side-channel attack on FNHE cache to discover UDP ephemeral ports.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-99077
23 Oct 202614:31
–circl
cve
CVE
CVE-2026-99077
23 Oct 202612:23
–cve
debiancve
Debian CVE
CVE-2026-99077
23 Oct 202612:23
–debiancve
euvd
EUVD
EUVD-2026-108743
23 Oct 202612:23
–euvd
nvd
NVD
CVE-2026-99077
23 Oct 202613:17
–nvd
osv_debian
osv_debian
DEBIAN-CVE-2026-99077
23 Oct 202613:17
–osv_debian
ptsecurity
Positive Technologies
PT-2026-122054
23 Oct 202600:00
–ptsecurity
susecve
SUSE CVE
SUSE CVE-2026-99077
23 Oct 202623:50
–susecve
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv4/udp.c"
    ],
    "versions": [
      {
        "version": "4895c771c7f006b4b90f9d6b1d2210939ba57b38",
        "lessThan": "be4fd05398f2b5e42029be70ee875fc749b8ce3a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4895c771c7f006b4b90f9d6b1d2210939ba57b38",
        "lessThan": "4c3499f79f8c7e8561266bcc220a18538cec0458",
        "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/udp.c"
    ],
    "versions": [
      {
        "version": "3.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.6",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.11",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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