CVE-2024-26642VulnerabilityPublished 29 May 2024Updated 28 Jun 2026

Red Hat Security Advisory: kernel security and bug fix update

Affects Red HatSource GCVE Database

Mentioned vulnerabilities

Not known to be exploited.

Data as of 25 Oct 2026, 19:02 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 29 May 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hat Product Security Red Hat	Affected Red Hat Red Hat Enterprise Linux Red Hat Enterprise Linux AppStream EUS (v.9.2) Red Hat Enterprise Linux BaseOS EUS (v.9.2) Red Hat CodeReady Linux Builder EUS (v.9.2)	Fixed in–

AI-suggested

Red Hat has released updated kernel packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 9.2 Extended Update Support should apply the provided kernel updates promptly and reboot their systems to activate the fixes. No additional mitigation steps are indicated by the vendor advisory.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout (CVE-2024-26643) * kernel: netfilter: nf_tables: disallow anonymous set with timeout flag (CVE-2024-26642) * kernel: netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations (CVE-2024-26673) * kernel: ipv6: sr: fix possible use-after-free and null-ptr-deref (CVE-2024-26735) * kernel: net: ip_tunnel: prevent perpetual headroom growth (CVE-2024-26804) * kernel: cifs: fix underflow in parse_server_interfaces() (CVE-2024-26828) * kernel: fs: sysfs: Fix reference leak in sysfs_break_active_protection() (CVE-2024-26993) Bug Fix(es): * lan78xx changes for 9.2.z, to fix link speed change exception and other bug fixes (JIRA:RHEL-34926) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Impact

The vulnerabilities affect core Linux kernel components, potentially leading to issues such as memory corruption, use-after-free, null pointer dereference, and resource leaks. These could impact system stability and security, but the advisory rates the overall security impact as moderate. No known exploits in the wild have been reported at this time.

Summary

This advisory covers seven security fixes in the Linux kernel for Red Hat Enterprise Linux 9.2 Extended Update Support. The vulnerabilities include: CVE-2024-26642 and CVE-2024-26643 addressing netfilter nf_tables anonymous set handling; CVE-2024-26673 sanitizing protocol numbers in nft_ct custom expectations; CVE-2024-26735 fixing a use-after-free and null pointer dereference in IPv6 segment routing; CVE-2024-26804 preventing perpetual headroom growth in IP tunnels; CVE-2024-26828 fixing an underflow in CIFS server interface parsing; and CVE-2024-26993 addressing a reference leak in sysfs active protection. These fixes are delivered via updated kernel packages requiring a system reboot. The advisory rates the overall impact as moderate and does not report known exploits in the wild.

CWE-99Improper Control of Resource Identifiers ('Resource Injection') (opens in a new tab)
Class weaknessLikelihood of exploit: HighOWASP Top 10 A05:2025: Injection (opens in a new tab)
The product receives input from an upstream component, but it does not restrict or incorrectly restricts the input before it is used as an identifier for a resource that may be outside the intended sphere of control.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
Injection Prevention (opens in a new tab)
SQL Injection Prevention (opens in a new tab)
Injection Prevention in Java (opens in a new tab)
OWASP ASVS 4.0.3
V1.5.1 (opens in a new tab)
Attack patterns
Buffer Overflow via Environment Variables (opens in a new tab)
Manipulating Writeable Configuration Files (opens in a new tab)
Resource Injection (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (opens in a new tab)
Class weaknessLikelihood of exploit: MediumOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
Architecture and Design
In languages that support it, use synchronization primitives. Only wrap these around critical code to minimize the impact on performance.
Architecture and Design
Use thread-safe capabilities such as the data access abstraction in Spring.
Architecture and Design
Minimize the usage of shared resources in order to remove as much complexity as possible from the control flow and to reduce the likelihood of unexpected conditions occurring.
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
Secure Design Principles (opens in a new tab)
OWASP ASVS 4.0.3
V1.11.2 (opens in a new tab)
Attack patterns
Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions (opens in a new tab)
Leveraging Race Conditions (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-476NULL Pointer Dereference (opens in a new tab)
Base weaknessLikelihood of exploit: MediumCWE Top 25 (2025): #13OWASP Top 10 A10:2025: Mishandling of Exceptional Conditions (opens in a new tab)
The product dereferences a pointer that it expects to be valid but is NULL.
Implementation
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
Requirements
Select a programming language that is not susceptible to these issues.
Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
OWASP Cheat Sheets
Logging (opens in a new tab)
Error Handling (opens in a new tab)
OWASP ASVS 4.0.3
V11.1.7 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-191Integer Underflow (Wrap or Wraparound) (opens in a new tab)
Base weakness
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 25 Jun 2026, 22:49 UTC

WeaknessesCWE-99, CWE-362, CWE-476 +1

Technical details

References

Community reviews

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