RHSA-2026:1690 - 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 Important. 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: irqchip/gic-v2m use-after-free vulnerability (CVE-2025-37819)
• kernel: RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem (CVE-2025-38022)
• kernel: Linux kernel use-after-free in eventpoll (CVE-2025-38349)
• kernel: io_uring/msg_ring: ensure io_kiocb freeing is deferred for RCU (CVE-2025-38453)
• kernel: net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing (CVE-2025-38568)
• kernel: drm/xe: Fix vm_bind_ioctl double free bug (CVE-2025-38731)
• kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping (CVE-2025-40154)
• kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170)
• kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135)
• kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158)
• kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248)
• kernel: mptcp: fix race condition in mptcp_schedule_work() (CVE-2025-40258)
• kernel: devlink: rate: Unset parent pointer in devl_rate_nodes_destroy (CVE-2025-40251)
• kernel: Linux kernel: Use-after-free in proc_readdir_de() can lead to privilege escalation or denial of service. (CVE-2025-40271)
• kernel: Linux kernel: Out-of-bounds write in Bluetooth MGMT can lead to information disclosure and denial of service (CVE-2025-40294)
• kernel: Linux kernel: Information disclosure and denial of service in Bluetooth HCI event handling (CVE-2025-40301)
• kernel: Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once (CVE-2025-40318)
• kernel: net: atlantic: fix fragment overflow handling in RX path (CVE-2025-68301)
• kernel: Bluetooth: hci_sock: Prevent race in socket write iter and sock bind (CVE-2025-68305)

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 - 2365032 - CVE-2025-37819 kernel: Linux kernel: irqchip/gic-v2m use-after-free vulnerability
• BZ - 2373326 - CVE-2025-38022 kernel: RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem
• BZ - 2381870 - CVE-2025-38349 kernel: Linux kernel use-after-free in eventpoll
• BZ - 2383516 - CVE-2025-38453 kernel: io_uring/msg_ring: ensure io_kiocb freeing is deferred for RCU
• BZ - 2389507 - CVE-2025-38568 kernel: net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing
• BZ - 2393488 - CVE-2025-38731 kernel: drm/xe: Fix vm_bind_ioctl double free bug
• BZ - 2414494 - CVE-2025-40154 kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping
• BZ - 2414506 - CVE-2025-40170 kernel: net: use dst_dev_rcu() in sk_setup_caps()
• BZ - 2414521 - CVE-2025-40135 kernel: ipv6: use RCU in ip6_xmit()
• BZ - 2414523 - CVE-2025-40158 kernel: ipv6: use RCU in ip6_output()
• BZ - 2418872 - CVE-2025-40248 kernel: Linux kernel: vsock vulnerability may lead to memory corruption
• BZ - 2418876 - CVE-2025-40258 kernel: mptcp: fix race condition in mptcp_schedule_work()
• BZ - 2418892 - CVE-2025-40251 kernel: devlink: rate: Unset parent pointer in devl_rate_nodes_destroy
• BZ - 2419837 - CVE-2025-40271 kernel: Linux kernel: Use-after-free in proc_readdir_de() can lead to privilege escalation or denial of service.
• BZ - 2419891 - CVE-2025-40294 kernel: Linux kernel: Out-of-bounds write in Bluetooth MGMT can lead to information disclosure and denial of service
• BZ - 2419896 - CVE-2025-40301 kernel: Linux kernel: Information disclosure and denial of service in Bluetooth HCI event handling
• BZ - 2419920 - CVE-2025-40318 kernel: Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once
• BZ - 2422836 - CVE-2025-68301 kernel: net: atlantic: fix fragment overflow handling in RX path
• BZ - 2422840 - CVE-2025-68305 kernel: Bluetooth: hci_sock: Prevent race in socket write iter and sock bind

CVEs

• CVE-2025-37819
• CVE-2025-38022
• CVE-2025-38349
• CVE-2025-38453
• CVE-2025-38568
• CVE-2025-38731
• CVE-2025-40135
• CVE-2025-40154
• CVE-2025-40158
• CVE-2025-40170
• CVE-2025-40248
• CVE-2025-40251
• CVE-2025-40258
• CVE-2025-40271
• CVE-2025-40294
• CVE-2025-40301
• CVE-2025-40318
• CVE-2025-68301
• CVE-2025-68305

References

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