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: net: af_can: do not leave a dangling sk pointer in can_create() (CVE-2024-56603) * kernel: net/sched: Make cake_enqueue return NET_XMIT_CN when past buffer_limit (CVE-2025-39766) * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724) * kernel: scsi: qla2xxx: Fix improper freeing of purex item (CVE-2025-68741) * kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270) * kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling (CVE-2026-23401) * kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402) * kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold (CVE-2026-31408) * kernel: usbip: validate number_of_packets in usbip_pack_ret_submit() (CVE-2026-31607) * kernel: RDMA/umem: Fix double dma_buf_unpin in failure path (CVE-2026-43128) * kernel: "Dirty Frag" is a new universal Local Privilege Escalation (LPE) vulnerability in the Linux kernel (CVE-2026-43284) * kernel: "Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel (CVE-2026-46300) * kernel: Read root-owned files as an unprivileged user (CVE-2026-46333) 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 a set of 13 Linux kernel vulnerabilities affecting Red Hat Enterprise Linux 10 and related builds. Vulnerabilities include dangling pointer in af_can (CVE-2024-56603), buffer limit handling in net/sched (CVE-2025-39766), overflow in asymmetric_key_generate_id (CVE-2025-68724), improper freeing in SCSI qla2xxx (CVE-2025-68741), use-after-free in traffic control (CVE-2026-23270), privilege escalation and denial of service in KVM shadow page table handling (CVE-2026-23401), heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402), use-after-free in Bluetooth SCO (CVE-2026-31408), validation issue in usbip (CVE-2026-31607), double dma_buf_unpin in RDMA (CVE-2026-43128), and two local privilege escalation vulnerabilities known as 'Dirty Frag' (CVE-2026-43284) and its variant 'Fragnesia' (CVE-2026-46300). Additionally, a vulnerability allows reading root-owned files as an unprivileged user (CVE-2026-46333). Red Hat has issued updated kernel packages addressing these vulnerabilities, requiring a reboot for the fixes to take effect.
Potential Impact
The vulnerabilities collectively may allow local attackers to cause denial of service, escalate privileges to root, or read sensitive root-owned files without authorization. Some issues could also lead to system instability or crashes. The presence of multiple use-after-free and heap overflow bugs increases the risk of exploitation leading to privilege escalation or denial of service. The 'Dirty Frag' and 'Fragnesia' vulnerabilities are notable local privilege escalation issues affecting the Linux kernel's networking stack. No known exploits in the wild have been reported at the time of this advisory.
Mitigation Recommendations
Red Hat has released updated kernel packages for Red Hat Enterprise Linux 10 and related variants that address all listed vulnerabilities. Applying these updates and rebooting the affected systems is required to remediate the issues. For detailed update instructions, refer to the official Red Hat advisory at https://access.redhat.com/errata/RHSA-2026:19569 and https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official patches 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: net: af_can: do not leave a dangling sk pointer in can_create() (CVE-2024-56603) * kernel: net/sched: Make cake_enqueue return NET_XMIT_CN when past buffer_limit (CVE-2025-39766) * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724) * kernel: scsi: qla2xxx: Fix improper freeing of purex item (CVE-2025-68741) * kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270) * kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling (CVE-2026-23401) * kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402) * kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold (CVE-2026-31408) * kernel: usbip: validate number_of_packets in usbip_pack_ret_submit() (CVE-2026-31607) * kernel: RDMA/umem: Fix double dma_buf_unpin in failure path (CVE-2026-43128) * kernel: "Dirty Frag" is a new universal Local Privilege Escalation (LPE) vulnerability in the Linux kernel (CVE-2026-43284) * kernel: "Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel (CVE-2026-46300) * kernel: Read root-owned files as an unprivileged user (CVE-2026-46333) 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-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The advisory covers a set of 13 Linux kernel vulnerabilities affecting Red Hat Enterprise Linux 10 and related builds. Vulnerabilities include dangling pointer in af_can (CVE-2024-56603), buffer limit handling in net/sched (CVE-2025-39766), overflow in asymmetric_key_generate_id (CVE-2025-68724), improper freeing in SCSI qla2xxx (CVE-2025-68741), use-after-free in traffic control (CVE-2026-23270), privilege escalation and denial of service in KVM shadow page table handling (CVE-2026-23401), heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402), use-after-free in Bluetooth SCO (CVE-2026-31408), validation issue in usbip (CVE-2026-31607), double dma_buf_unpin in RDMA (CVE-2026-43128), and two local privilege escalation vulnerabilities known as 'Dirty Frag' (CVE-2026-43284) and its variant 'Fragnesia' (CVE-2026-46300). Additionally, a vulnerability allows reading root-owned files as an unprivileged user (CVE-2026-46333). Red Hat has issued updated kernel packages addressing these vulnerabilities, requiring a reboot for the fixes to take effect.
Potential Impact
The vulnerabilities collectively may allow local attackers to cause denial of service, escalate privileges to root, or read sensitive root-owned files without authorization. Some issues could also lead to system instability or crashes. The presence of multiple use-after-free and heap overflow bugs increases the risk of exploitation leading to privilege escalation or denial of service. The 'Dirty Frag' and 'Fragnesia' vulnerabilities are notable local privilege escalation issues affecting the Linux kernel's networking stack. No known exploits in the wild have been reported at the time of this advisory.
Mitigation Recommendations
Red Hat has released updated kernel packages for Red Hat Enterprise Linux 10 and related variants that address all listed vulnerabilities. Applying these updates and rebooting the affected systems is required to remediate the issues. For detailed update instructions, refer to the official Red Hat advisory at https://access.redhat.com/errata/RHSA-2026:19569 and https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official patches 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-2026:19569
- Cve Count
- 13
- Additional Cves
- ["CVE-2025-39766","CVE-2025-68724","CVE-2025-68741","CVE-2026-23270","CVE-2026-23401","CVE-2026-31402","CVE-2026-31408","CVE-2026-31607","CVE-2026-43128","CVE-2026-43284","CVE-2026-46300","CVE-2026-46333"]
- Cvss Version
- null
Threat ID: 6a175eede29bf47b50edbb97
Added to database: 5/27/2026, 9:15:25 PM
Last enriched: 5/27/2026, 9:19:24 PM
Last updated: 5/29/2026, 7:06:25 PM
Views: 29
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