Red Hat Security Advisory: kernel security update
The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: md/bitmap: fix GPF in write_page caused by resize race (CVE-2026-43163) * kernel: rtmutex: Use waiter::task instead of current in remove_waiter() (CVE-2026-43499) * kernel: futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock (CVE-2026-53166) 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.
AI Analysis
Technical Summary
The advisory covers three kernel vulnerabilities: CVE-2026-43163 fixes a general protection fault in md/bitmap write_page caused by a resize race condition; CVE-2026-43499 corrects the use of waiter::task instead of the current task in the remove_waiter() function of rtmutex; CVE-2026-53166 prevents a NULL pointer dereference in futex/requeue during self-deadlock scenarios. These flaws could lead to kernel crashes or instability. Red Hat has released updated kernel packages for Red Hat Enterprise Linux 10 and related variants to address these issues. The update requires a system reboot to take effect.
Potential Impact
Successful exploitation of these vulnerabilities could cause kernel crashes, leading to denial of service or system instability. There are no known exploits in the wild at this time. The vulnerabilities affect the core Linux kernel, which is critical to system operation.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users should apply the available kernel updates for Red Hat Enterprise Linux 10 and reboot their systems to ensure the fixes take effect. Refer to Red Hat's official advisory RHSA-2026:38492 and article https://access.redhat.com/articles/11258 for detailed update instructions.
Red Hat Security Advisory: kernel security update
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: md/bitmap: fix GPF in write_page caused by resize race (CVE-2026-43163) * kernel: rtmutex: Use waiter::task instead of current in remove_waiter() (CVE-2026-43499) * kernel: futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock (CVE-2026-53166) 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.
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The advisory covers three kernel vulnerabilities: CVE-2026-43163 fixes a general protection fault in md/bitmap write_page caused by a resize race condition; CVE-2026-43499 corrects the use of waiter::task instead of the current task in the remove_waiter() function of rtmutex; CVE-2026-53166 prevents a NULL pointer dereference in futex/requeue during self-deadlock scenarios. These flaws could lead to kernel crashes or instability. Red Hat has released updated kernel packages for Red Hat Enterprise Linux 10 and related variants to address these issues. The update requires a system reboot to take effect.
Potential Impact
Successful exploitation of these vulnerabilities could cause kernel crashes, leading to denial of service or system instability. There are no known exploits in the wild at this time. The vulnerabilities affect the core Linux kernel, which is critical to system operation.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users should apply the available kernel updates for Red Hat Enterprise Linux 10 and reboot their systems to ensure the fixes take effect. Refer to Red Hat's official advisory RHSA-2026:38492 and article https://access.redhat.com/articles/11258 for detailed update instructions.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:38492
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-43499","CVE-2026-53166"]
- Cvss Version
- null
Threat ID: 6a55ff5568715ace432f07ad
Added to database: 07/14/2026, 09:20:21 UTC
Last enriched: 07/14/2026, 09:28:28 UTC
Last updated: 07/26/2026, 20:52:04 UTC
Views: 92
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.