Red Hat Security Advisory: kernel security update
A moderate severity vulnerability (CVE-2024-43855) in the Linux kernel's md (multiple device) subsystem causes a deadlock between mddev_suspend and flush bio operations. This issue affects Red Hat Enterprise Linux 9 and related variants. A security update addressing this deadlock is available and requires a system reboot to take effect.
AI Analysis
Technical Summary
The vulnerability CVE-2024-43855 involves a deadlock condition in the Linux kernel's md subsystem, specifically between the mddev_suspend and flush bio operations. This deadlock could impact system stability or availability. Red Hat has issued a security advisory (RHSA-2025:3506) providing an updated kernel package that fixes this issue. The advisory covers multiple Red Hat Enterprise Linux 9 variants across architectures including x86_64, s390x, ppc64le, and aarch64. The update requires a system reboot to apply the fix.
Potential Impact
The deadlock in the md subsystem can cause system hangs or degraded performance due to blocked kernel operations. This affects the core Linux kernel in Red Hat Enterprise Linux 9, potentially impacting system availability. No known exploits in the wild have been reported.
Mitigation Recommendations
A security update for the kernel is available from Red Hat as detailed in advisory RHSA-2025:3506. Applying the update and rebooting the system is required to remediate the vulnerability. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigations are specified by the vendor.
Red Hat Security Advisory: kernel security update
Description
A moderate severity vulnerability (CVE-2024-43855) in the Linux kernel's md (multiple device) subsystem causes a deadlock between mddev_suspend and flush bio operations. This issue affects Red Hat Enterprise Linux 9 and related variants. A security update addressing this deadlock is available and requires a system reboot to take effect.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2024-43855 involves a deadlock condition in the Linux kernel's md subsystem, specifically between the mddev_suspend and flush bio operations. This deadlock could impact system stability or availability. Red Hat has issued a security advisory (RHSA-2025:3506) providing an updated kernel package that fixes this issue. The advisory covers multiple Red Hat Enterprise Linux 9 variants across architectures including x86_64, s390x, ppc64le, and aarch64. The update requires a system reboot to apply the fix.
Potential Impact
The deadlock in the md subsystem can cause system hangs or degraded performance due to blocked kernel operations. This affects the core Linux kernel in Red Hat Enterprise Linux 9, potentially impacting system availability. No known exploits in the wild have been reported.
Mitigation Recommendations
A security update for the kernel is available from Red Hat as detailed in advisory RHSA-2025:3506. Applying the update and rebooting the system is required to remediate the vulnerability. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigations are specified by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:3506
- Cve Count
- 1
Threat ID: 6a3da1d64853345fc1827264
Added to database: 06/25/2026, 21:47:02 UTC
Last enriched: 06/25/2026, 22:15:24 UTC
Last updated: 09/10/2026, 19:36:48 UTC
Views: 16
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