CVE-2024-26849

Kernel availability loss via undersized netlink attribute

Published Apr 17, 2024 · Updated May 11, 2026

Out-of-bounds read in the Linux kernel allows local users to hang the system by supplying a malformed netlink attribute. The lib/nlattr.c validation path leaves the minimum length for NLA_BE16 and NLA_BE32 at zero, so nla_validate_range_unsigned reads beyond an undersized attribute. Low-privileged local access is required to submit the netlink message, and the grounded impact is availability loss rather than data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in the Linux kernel allows local users to hang the system by supplying a malformed netlink attribute. The lib/nlattr.c validation path leaves the minimum length for NLA_BE16 and NLA_BE32 at zero, so nla_validate_range_unsigned reads beyond an undersized attribute. Low-privileged local access is required to submit the netlink message, and the grounded impact is availability loss rather than data disclosure or modification.

The record

CVE
CVE-2024-26849
Published
Apr 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 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

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=24ea1c8abaae6541ad95912422a9af4fb858428d <000a68159c0326b46c42ec712ab98793e7e625a7
  2. Affected versionversion=6.1
  3. Affected versionversion=cbfac0add2afe8960a09806012313765a2179423 <80b40f9cb87f3bf5877dfb852765cf92bc03ca77
  4. Affected versionversion=ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f <0ac219c4c3ab253f3981f346903458d20bacab32
  5. Affected versionversion=ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f <7a9d14c63b35f89563c5ecbadf918ad64979712d
  6. Affected versionversion=ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f <9a0d18853c280f6a0ee99f91619f2442a17a323a
  7. Affected versionversion=ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f <a2ab028151841cd833cb53eb99427e0cc990112d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=24ea1c8abaae6541ad95912422a9af4fb858428d <000a68159c0326b46c42ec712ab98793e7e625a7; version=6.1; version=cbfac0add2afe8960a09806012313765a2179423 <80b40f9cb87f3bf5877dfb852765cf92bc03ca77; version=ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f <0ac219c4c3ab253f3981f346903458d20bacab32; version=ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f <7a9d14c63b35f89563c5ecbadf918ad64979712d; version=ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f <9a0d18853c280f6a0ee99f91619f2442a17a323a; version=ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f <a2ab028151841cd833cb53eb99427e0cc990112d

Published CVSS scores

5.5NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-908Use of Uninitialized Resource
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo