CVE-2024-49934

System crash via stale dentry name dereference

Published Oct 21, 2024 · Updated Aug 5, 2026

Use-after-free in fs/inode.c in Linux allows local users to crash the kernel during memory hot-removal while hugetlb pages are in use. dump_mapping() passes a stale dentry name to the %pd formatter, whose dentry_name() path dereferences external_name storage freed by concurrent rename or unlink activity. Reachability requires same-host page-cache and dentry churn plus memory offlining; the bounded consequence is a kernel oops or panic and service interruption.

CVSS severity7.1
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in fs/inode.c in Linux allows local users to crash the kernel during memory hot-removal while hugetlb pages are in use. dump_mapping() passes a stale dentry name to the %pd formatter, whose dentry_name() path dereferences external_name storage freed by concurrent rename or unlink activity. Reachability requires same-host page-cache and dentry churn plus memory offlining; the bounded consequence is a kernel oops or panic and service interruption.

The record

CVE
CVE-2024-49934
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <1a4159138e718db6199f0abf376ad52f726dcc5c
  2. Affected versionversion=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <7f7b850689ac06a62befe26e1fd1806799e7f152
  3. Affected versionversion=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <e0f6ee75f50476607ca82fc7c3711c795ce09b52
  4. Affected versionversion=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <ef921bc72328b577cb45772ff7921cba4773b74a
  5. Affected versionversion=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <f92b8829c6e75632de4e2b9f70e7a7e6c5c2ba98
  6. Affected versionversion=5.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <1a4159138e718db6199f0abf376ad52f726dcc5c; version=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <7f7b850689ac06a62befe26e1fd1806799e7f152; version=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <e0f6ee75f50476607ca82fc7c3711c795ce09b52; version=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <ef921bc72328b577cb45772ff7921cba4773b74a; version=1c6fb1d89e73cd3bbfae7c400f1c615272aa435f <f92b8829c6e75632de4e2b9f70e7a7e6c5c2ba98; version=5.0

Published CVSS scores

4.6CanonicalCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.6NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1Linux Kernel CVE TeamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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

T1499Endpoint Denial of Service

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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