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: RDMA/rxe: Fix the qp flush warnings in req (CVE-2024-53229) * kernel: Kernel: Double free vulnerability in exFAT filesystem can lead to denial of service (CVE-2025-38206) * kernel: sctp: avoid NULL dereference when chunk data buffer is missing (CVE-2025-40240) * kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (CVE-2025-71085) * kernel: svcrdma: use rc_pageoff for memcpy byte offset (CVE-2025-68811) 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 five kernel vulnerabilities affecting Red Hat Enterprise Linux 9.6 Extended Update Support. CVE-2024-53229 fixes qp flush warnings in RDMA/rxe. CVE-2025-38206 addresses a double free vulnerability in the exFAT filesystem that can cause denial of service. CVE-2025-40240 prevents a NULL dereference in SCTP when chunk data buffer is missing. CVE-2025-71085 fixes a kernel BUG() in IPv6's pskb_expand_head() function related to calipso_skbuff_setattr(). CVE-2025-68811 corrects the use of rc_pageoff for memcpy byte offset in svcrdma. The advisory provides updated kernel packages and requires a system reboot to apply the fixes. No CVSS scores are provided in the advisory, but the overall severity is rated moderate by Red Hat.
Potential Impact
The vulnerabilities collectively can lead to denial of service conditions (notably the double free in exFAT), kernel crashes (BUG() in IPv6), and potential stability issues due to NULL pointer dereferences and memory handling bugs. These issues affect the core Linux kernel, which could impact system reliability and availability if exploited or triggered. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated kernel packages for Red Hat Enterprise Linux 9.6 Extended Update Support that address these vulnerabilities. Users should apply the provided kernel updates as detailed in the Red Hat advisory (RHSA-2026:4745) and reboot their systems to ensure the fixes take effect. Patch status is confirmed as available via the official Red Hat advisory. No additional mitigations are specified beyond applying the update and rebooting.
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: RDMA/rxe: Fix the qp flush warnings in req (CVE-2024-53229) * kernel: Kernel: Double free vulnerability in exFAT filesystem can lead to denial of service (CVE-2025-38206) * kernel: sctp: avoid NULL dereference when chunk data buffer is missing (CVE-2025-40240) * kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (CVE-2025-71085) * kernel: svcrdma: use rc_pageoff for memcpy byte offset (CVE-2025-68811) 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 five kernel vulnerabilities affecting Red Hat Enterprise Linux 9.6 Extended Update Support. CVE-2024-53229 fixes qp flush warnings in RDMA/rxe. CVE-2025-38206 addresses a double free vulnerability in the exFAT filesystem that can cause denial of service. CVE-2025-40240 prevents a NULL dereference in SCTP when chunk data buffer is missing. CVE-2025-71085 fixes a kernel BUG() in IPv6's pskb_expand_head() function related to calipso_skbuff_setattr(). CVE-2025-68811 corrects the use of rc_pageoff for memcpy byte offset in svcrdma. The advisory provides updated kernel packages and requires a system reboot to apply the fixes. No CVSS scores are provided in the advisory, but the overall severity is rated moderate by Red Hat.
Potential Impact
The vulnerabilities collectively can lead to denial of service conditions (notably the double free in exFAT), kernel crashes (BUG() in IPv6), and potential stability issues due to NULL pointer dereferences and memory handling bugs. These issues affect the core Linux kernel, which could impact system reliability and availability if exploited or triggered. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated kernel packages for Red Hat Enterprise Linux 9.6 Extended Update Support that address these vulnerabilities. Users should apply the provided kernel updates as detailed in the Red Hat advisory (RHSA-2026:4745) and reboot their systems to ensure the fixes take effect. Patch status is confirmed as available via the official Red Hat advisory. No additional mitigations are specified beyond applying the update and rebooting.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:4745
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-38206","CVE-2025-40240","CVE-2025-68811","CVE-2025-71085"]
- Cvss Version
- null
Threat ID: 6a3da1c14853345fc181e07f
Added to database: 06/25/2026, 21:46:41 UTC
Last enriched: 06/25/2026, 21:53:59 UTC
Last updated: 07/31/2026, 19:22:52 UTC
Views: 25
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.