CVE-2026-98629Public exploitHinoki check available

Filter-table misselection via handle aliasing

Published Oct 18, 2026 · Updated Oct 18, 2026

Handle aliasing in Linux cls_u32 allows local users to corrupt traffic-filter table selection through crafted table handles. The u32_change function stores explicit handles as raw IDR keys, but deletion uses handle2id, leaking identifiers and making u32_lookup_ht select an unrelated table. Triggering requires traffic-control administration privileges in the relevant network namespace; demonstrated consequences are incorrect table selection and failed table creation, not kernel code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Handle aliasing in Linux cls_u32 allows local users to corrupt traffic-filter table selection through crafted table handles. The u32_change function stores explicit handles as raw IDR keys, but deletion uses handle2id, leaking identifiers and making u32_lookup_ht select an unrelated table. Triggering requires traffic-control administration privileges in the relevant network namespace; demonstrated consequences are incorrect table selection and failed table creation, not kernel code execution.

The record

CVE
CVE-2026-98629
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4403f9293ce9ecc2a55c688d84ee37e3ba0fc1a8
  2. Affected versionversion=6.11.10 <6.12
  3. Affected versionversion=6.1.119 <6.1.189
  4. Affected versionversion=6.12
  5. Affected versionversion=6.6.63 <6.6.158
  6. Affected versionversion=73af53d82076bbe184d9ece9e14b0dc8599e6055 <0a5f5d9e94dead312d32c366b917c64e552b72f7
  7. Affected versionversion=73af53d82076bbe184d9ece9e14b0dc8599e6055 <2f898f9ec7c73c5697ee462681e7ea6984ee1f3d
  8. Affected versionversion=73af53d82076bbe184d9ece9e14b0dc8599e6055 <54a454c5e41f5e2cb70c8163140ce095c5d5eefd
  9. Affected versionversion=73af53d82076bbe184d9ece9e14b0dc8599e6055 <f6696481eedfd5752b4b56eed715d0b0fe48b9c5
  10. Affected versionversion=789f9963bd031c3a185605665b744912df8e7eda <0fac292d93fdb313099e98cce928b3a524c92c94
  11. Affected versionversion=9b2c3184e126b941dfa716b8128ed6db92a64e2f <21fc07924e996e1e661268ca269c86b8d59d25b3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4403f9293ce9ecc2a55c688d84ee37e3ba0fc1a8; version=6.11.10 <6.12; version=6.1.119 <6.1.189; version=6.12; version=6.6.63 <6.6.158; version=73af53d82076bbe184d9ece9e14b0dc8599e6055 <0a5f5d9e94dead312d32c366b917c64e552b72f7; version=73af53d82076bbe184d9ece9e14b0dc8599e6055 <2f898f9ec7c73c5697ee462681e7ea6984ee1f3d; version=73af53d82076bbe184d9ece9e14b0dc8599e6055 <54a454c5e41f5e2cb70c8163140ce095c5d5eefd; version=73af53d82076bbe184d9ece9e14b0dc8599e6055 <f6696481eedfd5752b4b56eed715d0b0fe48b9c5; version=789f9963bd031c3a185605665b744912df8e7eda <0fac292d93fdb313099e98cce928b3a524c92c94; version=9b2c3184e126b941dfa716b8128ed6db92a64e2f <21fc07924e996e1e661268ca269c86b8d59d25b3

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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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