CVE-2024-28956VulnerabilityPublished 10 Nov 2025Updated 11 Jul 2026

Red Hat Security Advisory: kernel security update

Affects Red HatSource GCVE Database

Mentioned vulnerabilities

CVE-2025-39864

Not known to be exploited : upgrade the Red Hat redhat/kernel package to 10.3 when convenient.

Data as of 26 Oct 2026, 08:30 UTC

Severity

Medium

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 10.3

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Nov 2025
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 26 Oct 2026.

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

Upgrade the Red Hat redhat/kernel package to 10.3.

Affected software

Product	Affected	Fixed in
Red Hatredhat/kernel`pkg:rpm/redhat/kernel`Other threats	Affected <10.3 >=10.0	Fixed in 10.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released updated kernel packages that address these vulnerabilities. Users should apply the available kernel updates for Red Hat Enterprise Linux 10 as detailed in the advisory and reboot their systems to ensure the fixes take effect. Patch status is confirmed by the vendor advisory. There are no indications that additional mitigations beyond applying the update and rebooting are required.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * microcode_ctl: From CVEorg collector (CVE-2024-28956) * kernel: wifi: cfg80211: fix use-after-free in cmp_bss() (CVE-2025-39864) 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 the Linux kernel, potentially allowing issues related to microcode handling and a use-after-free condition in the wifi subsystem. The moderate severity rating indicates these issues could lead to system instability or limited security impact but are not classified as critical. No known exploits in the wild have been reported at this time.

Summary

Red Hat has issued a security advisory (RHSA-2025:19962) for Red Hat Enterprise Linux 10 addressing two vulnerabilities: CVE-2024-28956 affecting microcode_ctl, and CVE-2025-39864, a use-after-free flaw in the kernel's wifi cfg80211 component (cmp_bss function). These vulnerabilities impact the Linux kernel, the core of the operating system. The advisory rates the security impact as moderate and provides updated kernel packages to remediate these issues. The update requires a system reboot to apply the fixes. The advisory covers multiple Red Hat Enterprise Linux 10 variants across x86_64, IBM z Systems, Power (ppc64le), and ARM 64 architectures.

CWE-1421Exposure of Sensitive Information in Shared Microarchitectural Structures during Transient Execution (opens in a new tab)
Base weakness
A processor event may allow transient operations to access architecturally restricted data (for example, in another address space) in a shared microarchitectural structure (for example, a CPU cache), potentially exposing the data over a covert channel.
Architecture and Design
Hardware designers may choose to engineer the processor's pipeline to prevent architecturally restricted data from being used by operations that can execute transiently.
Architecture and Design
Hardware designers may choose not to share microarchitectural resources that can contain sensitive data, such as fill buffers and store buffers.
Architecture and Design
Hardware designers may choose to sanitize specific microarchitectural state (for example, store buffers) when the processor transitions to a different context, such as whenever a system call is invoked.
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-416Use After Free (opens in a new tab)
Variant weaknessLikelihood of exploit: HighCWE Top 25 (2025): #7
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
Architecture and Design · Language Selection
Choose a language that provides automatic memory management.
Implementation · Attack Surface Reduction
When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 12 Jul 2026, 11:39 UTC

WeaknessesCWE-1421, CWE-416

Technical details

References

Community reviews

Related threats