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: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366) * kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270) * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392) * kernel: usbip: validate number_of_packets in usbip_pack_ret_submit() (CVE-2026-31607) * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685) * kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (CVE-2026-43037) * kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038) * kernel: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709) * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110) 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 (RHSA-2026:24343) addresses nine vulnerabilities in the Linux kernel packages for Red Hat Enterprise Linux 10.0 Extended Update Support. The issues include CVE-2025-68366 (nbd: defer config unlock in nbd_genl_connect), CVE-2026-23270 (use-after-free in traffic control potentially leading to denial of service or privilege escalation), CVE-2026-23392 (netfilter nf_tables flowtable release after RCU grace period on error), CVE-2026-31607 (usbip validation of number_of_packets), CVE-2026-31685 (netfilter ip6t_eui64 rejecting invalid MAC headers), CVE-2026-43037 and CVE-2026-43038 (clearing skb2->cb[] in ip6_tunnel and ipv6 icmp error handlers), CVE-2026-31709 (SMB client validating DACL before rewriting), and CVE-2026-43110 (wifi brcmfmac validating bsscfg indices). The advisory provides patches and requires rebooting systems to apply the fixes.
Potential Impact
The vulnerabilities collectively may lead to denial of service or privilege escalation on affected systems. Specific impacts include potential use-after-free conditions, improper validation leading to malformed packet handling, and security control validation bypasses. These issues affect core kernel components, which could impact system stability and security if exploited.
Mitigation Recommendations
A security update for the Linux kernel packages is available from Red Hat for Red Hat Enterprise Linux 10.0 Extended Update Support. Users should apply the update as described in the Red Hat advisory RHSA-2026:24343 and reboot affected systems to ensure the fixes take effect. No additional mitigation steps are indicated beyond applying the official update.
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: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366) * kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270) * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392) * kernel: usbip: validate number_of_packets in usbip_pack_ret_submit() (CVE-2026-31607) * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685) * kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (CVE-2026-43037) * kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038) * kernel: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709) * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110) 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 (RHSA-2026:24343) addresses nine vulnerabilities in the Linux kernel packages for Red Hat Enterprise Linux 10.0 Extended Update Support. The issues include CVE-2025-68366 (nbd: defer config unlock in nbd_genl_connect), CVE-2026-23270 (use-after-free in traffic control potentially leading to denial of service or privilege escalation), CVE-2026-23392 (netfilter nf_tables flowtable release after RCU grace period on error), CVE-2026-31607 (usbip validation of number_of_packets), CVE-2026-31685 (netfilter ip6t_eui64 rejecting invalid MAC headers), CVE-2026-43037 and CVE-2026-43038 (clearing skb2->cb[] in ip6_tunnel and ipv6 icmp error handlers), CVE-2026-31709 (SMB client validating DACL before rewriting), and CVE-2026-43110 (wifi brcmfmac validating bsscfg indices). The advisory provides patches and requires rebooting systems to apply the fixes.
Potential Impact
The vulnerabilities collectively may lead to denial of service or privilege escalation on affected systems. Specific impacts include potential use-after-free conditions, improper validation leading to malformed packet handling, and security control validation bypasses. These issues affect core kernel components, which could impact system stability and security if exploited.
Mitigation Recommendations
A security update for the Linux kernel packages is available from Red Hat for Red Hat Enterprise Linux 10.0 Extended Update Support. Users should apply the update as described in the Red Hat advisory RHSA-2026:24343 and reboot affected systems to ensure the fixes take effect. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:24343
- Cve Count
- 9
- Additional Cves
- ["CVE-2026-23270","CVE-2026-23392","CVE-2026-31607","CVE-2026-31685","CVE-2026-31709","CVE-2026-43037","CVE-2026-43038","CVE-2026-43110"]
Threat ID: 6a27320ee29bf47b509bf2ea
Added to database: 06/08/2026, 21:20:14 UTC
Last enriched: 08/11/2026, 20:35:38 UTC
Last updated: 09/14/2026, 22:01:30 UTC
Views: 414
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