CVE-2026-98379Hinoki check available

Kernel panic via unchecked IPv6 route device

Published Oct 9, 2026 · Updated Oct 9, 2026

NULL dereference in Linux IPv6 rpfilter allows local users to crash the kernel via crafted routing state in private namespaces. In net/ipv6/netfilter/ip6t_rpfilter.c, rpfilter_lookup_reverse6() accepts a successful route lookup without checking rt6i_idev before dereferencing it; lowering a nexthop device's MTU below IPV6_MIN_MTU removes that device state while its routes remain. Exploitation requires access to private user and network namespaces and an IPv6 rpfilter lookup, producing a kernel panic rather than a documented privilege escalation.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

NULL dereference in Linux IPv6 rpfilter allows local users to crash the kernel via crafted routing state in private namespaces. In net/ipv6/netfilter/ip6t_rpfilter.c, rpfilter_lookup_reverse6() accepts a successful route lookup without checking rt6i_idev before dereferencing it; lowering a nexthop device's MTU below IPV6_MIN_MTU removes that device state while its routes remain. Exploitation requires access to private user and network namespaces and an IPv6 rpfilter lookup, producing a kernel panic rather than a documented privilege escalation.

The record

CVE
CVE-2026-98379
Published
Oct 9, 2026
Updated
Oct 9, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.3
  2. Affected versionversion=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <1681ab6dd1271f2f36047490793b78b1848bbcc9
  3. Affected versionversion=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <1b9b5323725e458906c7620a3bc10398b51ad954
  4. Affected versionversion=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <290c96e5d9471d1ded9ab1e8ffbb04f6ee7b0f40
  5. Affected versionversion=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <3a7384bc2e66217c9a01a392281334f4423740a0
  6. Affected versionversion=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <65487e9e99431ffcf05024a817f51ee4e3bd9b47
  7. Affected versionversion=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <eafe081ea77d25b5c8e601680671b4ecb4520e7d
  8. Affected versionversion=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <f49da48bd679cfee646d6a40dd02b1933de577d1
  9. Affected versionversion=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <f4de78756b0fddbd125b2b1b77c74f2eccc8e977

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <1681ab6dd1271f2f36047490793b78b1848bbcc9; version=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <1b9b5323725e458906c7620a3bc10398b51ad954; version=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <290c96e5d9471d1ded9ab1e8ffbb04f6ee7b0f40; version=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <3a7384bc2e66217c9a01a392281334f4423740a0; version=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <65487e9e99431ffcf05024a817f51ee4e3bd9b47; version=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <eafe081ea77d25b5c8e601680671b4ecb4520e7d; version=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <f49da48bd679cfee646d6a40dd02b1933de577d1; version=e26f9a480fb6c1b614660e824d69a74e2ce990f3 <f4de78756b0fddbd125b2b1b77c74f2eccc8e977

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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