CVE-2024-44934

Kernel memory corruption via multicast port teardown

Published Aug 26, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel bridge multicast handling allows local users to corrupt kernel memory during bridge-port removal. br_multicast_del_port frees a bridge port without first waiting for queued multicast garbage-collection work, leaving group timers to dereference the freed port. The path requires local low-privileged access with CAP_NET_ADMIN in a network namespace; exploitation crashes the kernel or enables kernel-memory reads and writes.

CVSS severity7.8
High
EPSS probability0.22%
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 Linux kernel bridge multicast handling allows local users to corrupt kernel memory during bridge-port removal. br_multicast_del_port frees a bridge port without first waiting for queued multicast garbage-collection work, leaving group timers to dereference the freed port. The path requires local low-privileged access with CAP_NET_ADMIN in a network namespace; exploitation crashes the kernel or enables kernel-memory reads and writes.

The record

CVE
CVE-2024-44934
Published
Aug 26, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 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=5.10
  2. Affected versionversion=e12cec65b5546f19217e26aafb8add6e2fadca18 <0d8b26e10e680c01522d7cc14abe04c3265a928f
  3. Affected versionversion=e12cec65b5546f19217e26aafb8add6e2fadca18 <1e16828020c674b3be85f52685e8b80f9008f50f
  4. Affected versionversion=e12cec65b5546f19217e26aafb8add6e2fadca18 <92c4ee25208d0f35dafc3213cdf355fbe449e078
  5. Affected versionversion=e12cec65b5546f19217e26aafb8add6e2fadca18 <b2f794b168cf560682ff976b255aa6d29d14a658
  6. Affected versionversion=e12cec65b5546f19217e26aafb8add6e2fadca18 <e3145ca904fa8dbfd1a5bf0187905bc117b0efce

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=e12cec65b5546f19217e26aafb8add6e2fadca18 <0d8b26e10e680c01522d7cc14abe04c3265a928f; version=e12cec65b5546f19217e26aafb8add6e2fadca18 <1e16828020c674b3be85f52685e8b80f9008f50f; version=e12cec65b5546f19217e26aafb8add6e2fadca18 <92c4ee25208d0f35dafc3213cdf355fbe449e078; version=e12cec65b5546f19217e26aafb8add6e2fadca18 <b2f794b168cf560682ff976b255aa6d29d14a658; version=e12cec65b5546f19217e26aafb8add6e2fadca18 <e3145ca904fa8dbfd1a5bf0187905bc117b0efce

Published CVSS scores

7.8Linux Kernel CVE TeamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 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

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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