CVE-2024-26852

Kernel compromise via premature IPv6 route release

Published Apr 17, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel IPv6 routing from 4.11 through 6.7.9 allows local users to compromise kernel memory. During multipath route updates, cleanup releases fib6_info objects before ip6_route_mpath_notify finishes reading them through rt6_fill_node. Low-privileged local access to the routing Netlink path is required; successful memory reuse permits kernel data access or modification and can crash the system.

CVSS severity7.8
High
EPSS probability0.27%
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 IPv6 routing from 4.11 through 6.7.9 allows local users to compromise kernel memory. During multipath route updates, cleanup releases fib6_info objects before ip6_route_mpath_notify finishes reading them through rt6_fill_node. Low-privileged local access to the routing Netlink path is required; successful memory reuse permits kernel data access or modification and can crash the system.

The record

CVE
CVE-2024-26852
Published
Apr 17, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-416, CWE-20, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=3b1137fe74829e021f483756a648cbb87c8a1b4a <31ea5bcc7d4cd1423de6be327a2c034725704136; version=3b1137fe74829e021f483756a648cbb87c8a1b4a <394334fe2ae3b9f1e2332b873857e84cb28aac18; version=3b1137fe74829e021f483756a648cbb87c8a1b4a <61b34f73cdbdb8eaf9ea12e9e2eb3b29716c4dda; version=3b1137fe74829e021f483756a648cbb87c8a1b4a <664f9c647260cc9d68b4e31d9899530d89dd045e; version=3b1137fe74829e021f483756a648cbb87c8a1b4a <685f7d531264599b3f167f1e94bbd22f120e5fab; version=3b1137fe74829e021f483756a648cbb87c8a1b4a <79ce2e54cc0ae366f45516c00bf1b19aa43e9abe; version=3b1137fe74829e021f483756a648cbb87c8a1b4a <cae3303257950d03ffec2df4a45e836f10d26c24; version=3b1137fe74829e021f483756a648cbb87c8a1b4a <ed883060c38721ed828061f6c0c30e5147326c9a; version=4.11
The Linux Kernel Organization · Linux Kernelversion=3b1137fe7482 <31ea5bcc7d4c; version=3b1137fe7482 <394334fe2ae3; version=3b1137fe7482 <61b34f73cdbd; version=3b1137fe7482 <664f9c647260; version=3b1137fe7482 <685f7d531264; version=3b1137fe7482 <79ce2e54cc0a; version=3b1137fe7482 <cae330325795; version=3b1137fe7482 <ed883060c387; version=4.11

Published CVSS scores

7.8CISA ADP VulnrichmentCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0Siemens ProductCERTCVSS:3.1/AV:L/AC:H/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.

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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-416Use After Free
CWE-20Improper Input Validation
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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