CVE-2025-38211VulnerabilityPublished 2 Sep 2025Updated 30 Jul 2026

Red Hat Security Advisory: kernel-rt security update

Affects Red HatSource GCVE Database

Mentioned vulnerabilities

CVE-2025-38464

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: 0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 2 Sep 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 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 NFV (v. 8) Red Hat Enterprise Linux RT (v. 8) src	Fixed in–

AI-suggested

Red Hat has released an official security update for the kernel-rt packages that addresses these vulnerabilities. Users should apply the update as per Red Hat's instructions available at https://access.redhat.com/articles/11258. A system reboot is required for the update to take effect. No additional mitigation steps are indicated by the vendor.

Description

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: RDMA/iwcm: Fix use-after-free of work objects after cm_id destruction (CVE-2025-38211) * kernel: tipc: Fix use-after-free in tipc_conn_close() (CVE-2025-38464) 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 involve use-after-free conditions in kernel components, which can cause memory corruption. This may lead to system instability or potential escalation of privileges if exploited. However, the advisory rates the impact as Moderate, indicating a limited but meaningful security risk. There are no known exploits in the wild at this time.

Summary

This advisory covers two use-after-free vulnerabilities in the Red Hat kernel-rt packages. CVE-2025-38211 fixes a use-after-free of work objects in the RDMA/iwcm subsystem after cm_id destruction. CVE-2025-38464 addresses a use-after-free in the tipc_conn_close() function. Both vulnerabilities relate to improper memory handling that could lead to instability or potential exploitation. Red Hat has released updated kernel-rt packages for Red Hat Enterprise Linux 8 Real Time variants to remediate these issues. The update is rated with moderate severity and requires rebooting the system to apply.

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

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 25 Jun 2026, 22:32 UTC

WeaknessesCWE-416

Technical details

References

Community reviews

Related threats