CVE-2026-98064Public exploitHinoki check available

Kernel crash via const-void BTF rendering

Published Sep 25, 2026 · Updated Sep 25, 2026

NULL pointer dereference in affected Linux kernels allows local users to crash the kernel by passing a const-void BTF type to bpf_snprintf_btf(). btf_modifier_show() resolves the modifier to void and unconditionally invokes btf_type_ops(t)->show(), although BTF_KIND_UNKN has no operation-table entry. Reachability requires the ability to run a BPF program that supplies a vmlinux BTF type identifier; exercising the path causes an oops and can panic the host.

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

What happened

NULL pointer dereference in affected Linux kernels allows local users to crash the kernel by passing a const-void BTF type to bpf_snprintf_btf(). btf_modifier_show() resolves the modifier to void and unconditionally invokes btf_type_ops(t)->show(), although BTF_KIND_UNKN has no operation-table entry. Reachability requires the ability to run a BPF program that supplies a vmlinux BTF type identifier; exercising the path causes an oops and can panic the host.

The record

CVE
CVE-2026-98064
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

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=5.10
  2. Affected versionversion=c4d0bfb45068d853a478b9067a95969b1886a30f <4ea508b9ebd78bce7f212166d2e2cba66b875f08
  3. Affected versionversion=c4d0bfb45068d853a478b9067a95969b1886a30f <5324f4e75ff6e9c2ca2e267c5f34f0937f9d0ac9
  4. Affected versionversion=c4d0bfb45068d853a478b9067a95969b1886a30f <717abdfd1d559d01fdd102023f0a990fb0437240
  5. Affected versionversion=c4d0bfb45068d853a478b9067a95969b1886a30f <98f1cb95221332139acf514350ae2cae3b8656c5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=c4d0bfb45068d853a478b9067a95969b1886a30f <4ea508b9ebd78bce7f212166d2e2cba66b875f08; version=c4d0bfb45068d853a478b9067a95969b1886a30f <5324f4e75ff6e9c2ca2e267c5f34f0937f9d0ac9; version=c4d0bfb45068d853a478b9067a95969b1886a30f <717abdfd1d559d01fdd102023f0a990fb0437240; version=c4d0bfb45068d853a478b9067a95969b1886a30f <98f1cb95221332139acf514350ae2cae3b8656c5

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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