CVE-2026-98095Public exploit

Kernel crash via signed packet-length conversion

Published Sep 25, 2026 · Updated Sep 25, 2026

Integer conversion in Linux kernel af_packet code allows local users to crash the kernel through a crafted TX_RING packet length. tpacket_parse_header() stores the user-controlled unsigned tp_len field in a signed int, so values above INT_MAX become negative and bypass the upper-bound check. Triggering the BUG requires local access to an AF_PACKET TX_RING socket and interrupts the affected host rather than exposing or modifying data.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer conversion in Linux kernel af_packet code allows local users to crash the kernel through a crafted TX_RING packet length. tpacket_parse_header() stores the user-controlled unsigned tp_len field in a signed int, so values above INT_MAX become negative and bypass the upper-bound check. Triggering the BUG requires local access to an AF_PACKET TX_RING socket and interrupts the affected host rather than exposing or modifying data.

The record

CVE
CVE-2026-98095
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=2.6.31
  2. Affected versionversion=69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 <72abe77e88c3f1f71c5348124e9b28e285f26950
  3. Affected versionversion=69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 <73e594c19b4f815d8343461cec7074c4713bbde7
  4. Affected versionversion=69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 <9d714076ff398ba8cc5ae0ae146f4a1ea0bbf5e8
  5. Affected versionversion=69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 <c6b3db727876a027013aa4ccb6913a153a2af41a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.31; version=69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 <72abe77e88c3f1f71c5348124e9b28e285f26950; version=69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 <73e594c19b4f815d8343461cec7074c4713bbde7; version=69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 <9d714076ff398ba8cc5ae0ae146f4a1ea0bbf5e8; version=69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 <c6b3db727876a027013aa4ccb6913a153a2af41a

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 exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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