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ALSA-2026:42550 — Important: kernel-rt security, bug fix, and enhancement update

Affected: AlmaLinux:8: kernel-rt, AlmaLinux:8: kernel-rt-core, AlmaLinux:8: kernel-rt-debug, AlmaLinux:8: kernel-rt-debug-core, AlmaLinux:8: kernel-rt-debug-devel, AlmaLinux:8: kernel-rt-debug-modules, AlmaLinux:8: kernel-rt-debug-modules-extra, AlmaLinux:8: kernel-rt-devel, AlmaLinux:8: kernel-rt-modules, AlmaLinux:8: kernel-rt-modules-extra

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CVE-2026-46117) * kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp (CVE-2026-53071)

Bug Fix(es) and Enhancement(s):

* [almalinux-8] WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected - at: vmd_pci_write+0x85/0xe0 - deadlock (JIRA:AlmaLinux-174916)

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.

bdu:2026-13979

BELL-CVE-2026-53071

Affected: Alpaquita:23: linux-lts, Alpaquita:25: linux-lts, Alpaquita:stream: linux-lts

certfr-2026-avi-0862 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian LTS. Certaines d'entre elles permettent à…

certfr-2026-avi-0862

EUVD-2026-369293

fkie_cve-2026-53071

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file acquires the lock first. A remote BLE device can send a crafted L2CAP ECRED reconfiguration response to corrupt the channel list while another thread is iterating it.

Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().

GHSA-g7cw-xhg8-933g

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().

msrc_CVE-2026-53071 — Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

msrc_CVE-2026-53071

OESA-2026-2871 — kernel security update

Affected: openEuler:22.03-LTS-SP4: kernel

The Linux Kernel, the operating system core itself. Security Fix(es):

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conntrack_expect: use expect->helper

Use expect->helper in ctnetlink and /proc to dump the helper name. Using nfct_help() without holding a reference to the master conntrack is unsafe.

Use exp->master->helper in ctnetlink path if userspace does not provide an explicit helper when creating an expectation to retain the existing behaviour. The ctnetlink expectation path holds the reference on the master conntrack and nf_conntrack_expect lock and the nfnetlink glue path refers to the master ct that is attached to the skb.(CVE-2026-31414)

In the Linux kernel, the following vulnerability has been resolved:

xfs: avoid dereferencing log items after push callbacks

After xfsaild_push_item() calls iop_push(), the log item may have been freed if the AIL lock was dropped during the push. Background inode reclaim or the dquot shrinker can free the log item while the AIL lock is not held, and the tracepoints in the switch statement dereference the log item after iop_push() returns.

Fix this by capturing the log item type, flags, and LSN before calling xfsaild_push_item(), and introducing a new xfs_ail_push_class trace event class that takes these pre-captured values and the ailp pointer instead of the log item pointer.(CVE-2026-31453)

In the Linux kernel, the following vulnerability has been resolved:

xfs: stop recl…

openSUSE-SU-2026:21555-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

RHSA-2026:42550 — Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update

kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

RLSA-2026:42550 — Important: kernel-rt security, bug fix, and enhancement update

Affected: Rocky Linux:8: kernel-rt

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CVE-2026-46117)

* kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp (CVE-2026-53071)

Bug Fix(es) and Enhancement(s):

* [rhel-8] WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected - at: vmd_pci_write+0x85/0xe0 - deadlock (JIRA:Rocky Linux-174916)

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.

SUSE-SU-2026:22521-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2026-53071

Affected: Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:18.04:LTS: linux-aws-5.0, Ubuntu:18.04:LTS: linux-aws-5.3, Ubuntu:18.04:LTS: linux-azure, Ubuntu:18.04:LTS: linux-azure-5.3, Ubuntu:18.04:LTS: linux-azure-edge, Ubuntu:18.04:LTS: linux-gcp, Ubuntu:18.04:LTS: linux-gcp-5.3, Ubuntu:18.04:LTS: linux-gke-4.15, Ubuntu:18.04:LTS: linux-gke-5.4 and 200 more

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file acquires the lock first. A remote BLE device can send a crafted L2CAP ECRED reconfiguration response to corrupt the channel list while another thread is iterating it. Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().

WID-SEC-W-2026-2077 — Linux Kernel: Mehrere Schwachstellen

Ein entfernter Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen und weitere, nicht näher spezifizierte Auswirkungen zu erzielen.