CVE-2024-46789

Service interruption via unmatched allocation-tag subtraction

Published Sep 18, 2024 · Updated May 11, 2026

Allocation-tag accounting in Linux 6.10 through 6.10.9 allows local users to trigger a kernel warning and service interrupt. The alloc_tagging_slab_free_hook subtracts an allocation tag whenever object extensions exist, even when prepare_slab_obj_exts_hook skipped adding the tag and left ref->ct null. The flaw requires CONFIG_MEMCG, CONFIG_KFENCE, and CONFIG_KMEMLEAK; the published trace demonstrates a warning but does not document a crash.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Allocation-tag accounting in Linux 6.10 through 6.10.9 allows local users to trigger a kernel warning and service interrupt. The alloc_tagging_slab_free_hook subtracts an allocation tag whenever object extensions exist, even when prepare_slab_obj_exts_hook skipped adding the tag and left ref->ct null. The flaw requires CONFIG_MEMCG, CONFIG_KFENCE, and CONFIG_KMEMLEAK; the published trace demonstrates a warning but does not document a crash.

The record

CVE
CVE-2024-46789
Published
Sep 18, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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?

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  1. Affected versionversion=4b8736964640fe160724e7135dc62883bddcdace <2d476c86ba4745fcbc912ce4627df4fa80caa9ad
  2. Affected versionversion=4b8736964640fe160724e7135dc62883bddcdace <ab7ca09520e9c41c219a4427fe0dae24024bfe7f
  3. Affected versionversion=6.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4b8736964640fe160724e7135dc62883bddcdace <2d476c86ba4745fcbc912ce4627df4fa80caa9ad; version=4b8736964640fe160724e7135dc62883bddcdace <ab7ca09520e9c41c219a4427fe0dae24024bfe7f; version=6.10

Published CVSS scores

5.5CanonicalCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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