CVE-2024-49869

Local kernel crash via name-length mismatch

Published Oct 21, 2024 · Updated May 11, 2026

Buffer-size accounting error in Linux 6.11 through 6.11.2 allows local users to crash the kernel during a btrfs send operation. The __counted_by annotation describes name_cache_entry.name as name_len bytes, while strcpy() copies the pathname plus its NUL terminator. Triggering the affected send-path traversal under fortified string checking invokes a kernel panic, interrupting the host.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer-size accounting error in Linux 6.11 through 6.11.2 allows local users to crash the kernel during a btrfs send operation. The __counted_by annotation describes name_cache_entry.name as name_len bytes, while strcpy() copies the pathname plus its NUL terminator. Triggering the affected send-path traversal under fortified string checking invokes a kernel panic, interrupting the host.

The record

CVE
CVE-2024-49869
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-120, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.11
  2. Affected versionversion=c0247d289e73e18f6ddb0895de30c09770fbed95 <843738ede6cb8b959fb22591fcbabe8b456d7216
  3. Affected versionversion=c0247d289e73e18f6ddb0895de30c09770fbed95 <96c6ca71572a3556ed0c37237305657ff47174b7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=c0247d289e73e18f6ddb0895de30c09770fbed95 <843738ede6cb8b959fb22591fcbabe8b456d7216; version=c0247d289e73e18f6ddb0895de30c09770fbed95 <96c6ca71572a3556ed0c37237305657ff47174b7

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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