RHSA-2026:4012 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: Linux kernel: Use-after-free in device mapper due to race condition in zone reporting (CVE-2025-38141)
• kernel: Linux kernel io_uring: Local privilege escalation, information disclosure, or denial of service via use-after-free (CVE-2025-38106)
• kernel: drm/xe: Make dma-fences compliant with the safe access rules (CVE-2025-38703)
• kernel: Linux kernel: Denial of Service via out-of-bounds read in USB configuration parsing (CVE-2025-39760)
• kernel: HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save (CVE-2025-39818)
• kernel: Kernel: Use-after-free in GPIO character device allows privilege escalation or denial of service (CVE-2025-40249)
• kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (CVE-2025-71085)
• kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001)
• kernel: Linux kernel: Denial of Service due to a deadlock in hugetlb folio migration (CVE-2026-23097)
• kernel: Linux kernel: Information disclosure in efivarfs via incorrect error propagation (CVE-2026-23156)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux for x86_64 10 x86_64
• Red Hat Enterprise Linux for IBM z Systems 10 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for x86_64 10 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 10 s390x

Fixes

• BZ - 2376052 - CVE-2025-38141 kernel: Linux kernel: Use-after-free in device mapper due to race condition in zone reporting
• BZ - 2376077 - CVE-2025-38106 kernel: Linux kernel io_uring: Local privilege escalation, information disclosure, or denial of service via use-after-free
• BZ - 2393157 - CVE-2025-38703 kernel: drm/xe: Make dma-fences compliant with the safe access rules
• BZ - 2394601 - CVE-2025-39760 kernel: Linux kernel: Denial of Service via out-of-bounds read in USB configuration parsing
• BZ - 2395797 - CVE-2025-39818 kernel: HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save
• BZ - 2418886 - CVE-2025-40249 kernel: Kernel: Use-after-free in GPIO character device allows privilege escalation or denial of service
• BZ - 2429026 - CVE-2025-71085 kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr()
• BZ - 2432664 - CVE-2026-23001 kernel: macvlan: fix possible UAF in macvlan_forward_source()
• BZ - 2436802 - CVE-2026-23097 kernel: Linux kernel: Denial of Service due to a deadlock in hugetlb folio migration
• BZ - 2439951 - CVE-2026-23156 kernel: Linux kernel: Information disclosure in efivarfs via incorrect error propagation

CVEs

• CVE-2025-38106
• CVE-2025-38141
• CVE-2025-38703
• CVE-2025-39760
• CVE-2025-39818
• CVE-2025-40249
• CVE-2025-71085
• CVE-2026-23001
• CVE-2026-23097
• CVE-2026-23156

References

• https://access.redhat.com/security/updates/classification/#moderate