Red Hat Security Advisory: kernel security, bug fix, and enhancement update
The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116) * kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984) * kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990) * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116) * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158) * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303) * kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs (CVE-2026-46323) * kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243) * kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227) * kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125) Bug Fix(es) and Enhancement(s): * [octeon_ep]: Verify VF ID [rhel-9.4.z] (JIRA:RHEL-117605) * libceph: CEPH_CRYPTO_AES256KRB5 (--key-type aes256k) support [rhel-9.4.z] (JIRA:RHEL-168925) * [RHEL-9] Performance impact of CVE-2025-38085 [rhel-9.4.z] (JIRA:RHEL-161144) 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
This Red Hat security advisory addresses multiple vulnerabilities in the Linux kernel packages for Red Hat Enterprise Linux 9.4. The fixes cover several CVEs including CVE-2025-71116 (libceph decode_pool resilience), CVE-2026-22984 (libceph out-of-bounds read), CVE-2026-22990 (libceph BUG_ON replacement), CVE-2026-43116 (netfilter ctnetlink safe access), CVE-2026-43158 (xfs freemap adjustment), CVE-2026-43303 (memory management page->private clearing), CVE-2026-46323 (use-after-free in net/gro), CVE-2026-46243 (SMB client rejecting userspace cifs.spnego), CVE-2026-46227 (SCTP list cursor revalidation), and CVE-2026-46125 (wifi mac80211 station removal on connection prep failure). The advisory includes bug fixes and enhancements and requires rebooting the system after applying the update. The vendor rates the security impact as Important (high severity).
Potential Impact
The vulnerabilities affect core Linux kernel components, potentially leading to out-of-bounds reads, use-after-free conditions, and improper handling of network and filesystem operations. These issues could result in system instability, denial of service, or other security impacts. The advisory does not report known exploits in the wild. The update mitigates these risks by patching the affected kernel components.
Mitigation Recommendations
An official security update from Red Hat is available for Red Hat Enterprise Linux 9.4 that addresses these vulnerabilities. Users should apply the kernel update as provided in the Red Hat advisory RHSA-2026:27735 and reboot their systems to ensure the fixes take effect. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: kernel security, bug fix, and enhancement update
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116) * kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984) * kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990) * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116) * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158) * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303) * kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs (CVE-2026-46323) * kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243) * kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227) * kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125) Bug Fix(es) and Enhancement(s): * [octeon_ep]: Verify VF ID [rhel-9.4.z] (JIRA:RHEL-117605) * libceph: CEPH_CRYPTO_AES256KRB5 (--key-type aes256k) support [rhel-9.4.z] (JIRA:RHEL-168925) * [RHEL-9] Performance impact of CVE-2025-38085 [rhel-9.4.z] (JIRA:RHEL-161144) 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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory addresses multiple vulnerabilities in the Linux kernel packages for Red Hat Enterprise Linux 9.4. The fixes cover several CVEs including CVE-2025-71116 (libceph decode_pool resilience), CVE-2026-22984 (libceph out-of-bounds read), CVE-2026-22990 (libceph BUG_ON replacement), CVE-2026-43116 (netfilter ctnetlink safe access), CVE-2026-43158 (xfs freemap adjustment), CVE-2026-43303 (memory management page->private clearing), CVE-2026-46323 (use-after-free in net/gro), CVE-2026-46243 (SMB client rejecting userspace cifs.spnego), CVE-2026-46227 (SCTP list cursor revalidation), and CVE-2026-46125 (wifi mac80211 station removal on connection prep failure). The advisory includes bug fixes and enhancements and requires rebooting the system after applying the update. The vendor rates the security impact as Important (high severity).
Potential Impact
The vulnerabilities affect core Linux kernel components, potentially leading to out-of-bounds reads, use-after-free conditions, and improper handling of network and filesystem operations. These issues could result in system instability, denial of service, or other security impacts. The advisory does not report known exploits in the wild. The update mitigates these risks by patching the affected kernel components.
Mitigation Recommendations
An official security update from Red Hat is available for Red Hat Enterprise Linux 9.4 that addresses these vulnerabilities. Users should apply the kernel update as provided in the Red Hat advisory RHSA-2026:27735 and reboot their systems to ensure the fixes take effect. No additional mitigation steps are indicated 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-2026:27735
- Cve Count
- 10
- Additional Cves
- ["CVE-2026-22984","CVE-2026-22990","CVE-2026-43116","CVE-2026-43158","CVE-2026-43303","CVE-2026-46125","CVE-2026-46227","CVE-2026-46243","CVE-2026-46323"]
- Cvss Version
- null
Threat ID: 6a395a01eed863c81e08df6a
Added to database: 06/22/2026, 15:51:29 UTC
Last enriched: 07/30/2026, 15:08:48 UTC
Last updated: 08/06/2026, 18:25:13 UTC
Views: 142
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