CVE-2026-74633Public exploit

System crash via NULL cached module match

Published Aug 22, 2026 · Updated Aug 22, 2026

NULL pointer dereference in Linux 6.14 tracing allows local users to crash the system through crafted event-filter writes. The remove_cache_mod() path passes a cached NULL event_mod->match for an unloaded module to strcmp() when a later append removes a specific match. A local account with write access to the tracefs set_event control is required; successful exploitation interrupts the entire host.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux 6.14 tracing allows local users to crash the system through crafted event-filter writes. The remove_cache_mod() path passes a cached NULL event_mod->match for an unloaded module to strcmp() when a later append removes a specific match. A local account with write access to the tracefs set_event control is required; successful exploitation interrupts the entire host.

The record

CVE
CVE-2026-74633
Published
Aug 22, 2026
Updated
Aug 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 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=6.14
  2. Affected versionversion=b355247df104ef6644288884afd2c08b7bf49897 <152a00440dc6ef62c6e4cf9bd881a7e6bb81fda9
  3. Affected versionversion=b355247df104ef6644288884afd2c08b7bf49897 <ad4e9dd5fec7a322a471ff36fb9c76214e3c6992
  4. Affected versionversion=b355247df104ef6644288884afd2c08b7bf49897 <b69859204d4db3acd86c1c2dadcef0d77b451933

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=b355247df104ef6644288884afd2c08b7bf49897 <152a00440dc6ef62c6e4cf9bd881a7e6bb81fda9; version=b355247df104ef6644288884afd2c08b7bf49897 <ad4e9dd5fec7a322a471ff36fb9c76214e3c6992; version=b355247df104ef6644288884afd2c08b7bf49897 <b69859204d4db3acd86c1c2dadcef0d77b451933

Published CVSS scores

4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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