CVE-2024-53150VulnerabilityPublished 15 Apr 2025Updated 29 Oct 2026

Red Hat Security Advisory: kernel-rt security update

Affects Linux kernelSource GCVE Database

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Mentioned vulnerabilities

CVE-2024-53241

Exploited in the wild · KEV due 30 Apr 2025 · 1% EPSS : apply the vendor's fix or mitigations to Linux kernel now.

Data as of 29 Oct 2026, 10:09 UTC

Exploitation

Actively exploited

Medium severity · No CVSS score from NVD or the CNA

KEV deadline: 30 Apr 2025 US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
EPSS: 1.3% chance of exploitation in 30 days – higher than 71% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

Disclosed: evidence found.
CVE published 15 Apr 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 6 days before disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

Added to CISA KEV (opens in a new tab)
exploitation confirmed
9 Apr 2025, 6 days before disclosure
CVE published
on cve.org
15 Apr 202509:50 UTC, t = 0
KEV remediation due
US federal deadline
30 Apr 2025, 15 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity 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

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Description

Red Hat has issued a security advisory for the kernel-rt packages, which provide the Real Time Linux Kernel for systems requiring high determinism. The update addresses two vulnerabilities: CVE-2024-53241, a speculative attack risk in the Xen hypercall page, and CVE-2024-53150, an out-of-bounds read in the ALSA usb-audio component when finding clock sources. The advisory rates the security impact as moderate. Systems must be rebooted after applying the update for the fixes to take effect.

Impact

The vulnerabilities fixed include a speculative execution attack vector in the Xen hypercall page and a memory safety issue due to out-of-bounds reads in the ALSA usb-audio driver. These issues could potentially allow unauthorized access or cause system instability. The security impact is rated as moderate by Red Hat Product Security. There are no known exploits in the wild at this time.

Mitigation

A security update for the kernel-rt packages is available from Red Hat as detailed in advisory RHSA-2025:3894. Users should apply the update promptly and reboot affected systems to ensure the fixes take effect. No additional mitigation steps are indicated by the vendor.

Summary

The Red Hat kernel-rt security update fixes two vulnerabilities in the Real Time Linux Kernel. CVE-2024-53241 addresses a speculative execution vulnerability in the Xen hypercall page, which could be exploited to bypass security boundaries. CVE-2024-53150 fixes an out-of-bounds read in the ALSA usb-audio driver related to clock source detection, which could lead to memory safety issues. The update is provided for Red Hat Enterprise Linux for Real Time 8 and related variants. The advisory references Red Hat's errata RHSA-2025:3894 and requires a system reboot to apply the fixes.

CWE-125Out-of-bounds Read (opens in a new tab)
Base weaknessCWE Top 25 (2025): #8
The product reads data past the end, or before the beginning, of the intended buffer.
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.
Architecture and Design · Language Selection
Use a language that provides appropriate memory abstractions.
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)
Attack patterns
Overread Buffers (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer (opens in a new tab)
Class weaknessLikelihood of exploit: High
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Operation · Build and Compilation · Environment Hardening
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index…
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)
Attack patterns
Buffer Overflow via Environment Variables (opens in a new tab)
Overflow Buffers (opens in a new tab)
Client-side Injection-induced Buffer Overflow (opens in a new tab)
Filter Failure through Buffer Overflow (opens in a new tab)
MIME Conversion (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

Timeline

What to do

Description

AI analysisMachine-generated, updated 29 Oct 2026, 10:08 UTC

WeaknessesCWE-125, CWE-119

Technical details

References

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