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ALSA-2025:12662 — Important: kernel security update

Affected: AlmaLinux:10: kernel-abi-stablelists, AlmaLinux:10: kernel-doc

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

Security Fix(es):

* kernel: padata: fix UAF in padata_reorder (CVE-2025-21727) * kernel: HID: intel-ish-hid: Fix use-after-free issue in ishtp_hid_remove() (CVE-2025-21928) * kernel: HID: intel-ish-hid: Fix use-after-free issue in hid_ishtp_cl_remove() (CVE-2025-21929) * kernel: memstick: rtsx_usb_ms: Fix slab-use-after-free in rtsx_usb_ms_drv_remove (CVE-2025-22020) * kernel: ext4: avoid journaling sb update on error if journal is destroying (CVE-2025-22113) * kernel: RDMA/core: Fix use-after-free when rename device name (CVE-2025-22085) * kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc (CVE-2025-37890) * kernel: net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done (CVE-2025-38052) * kernel: net: ch9200: fix uninitialised access during mii_nway_restart (CVE-2025-38086) * kernel: net/sched: fix use-after-free in taprio_dev_notifier (CVE-2025-38087) * kernel: nvme-tcp: sanitize request list handling (CVE-2025-38264)

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:2025-06490

BELL-CVE-2025-37890

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

certfr-2025-avi-0464 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian. Elles permettent à un attaquant de provo…

certfr-2025-avi-0464

EUVD-2026-346844

fkie_cve-2025-37890

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

net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc

As described in Gerrard's report [1], we have a UAF case when an hfsc class has a netem child qdisc. The crux of the issue is that hfsc is assuming that checking for cl->qdisc->q.qlen == 0 guarantees that it hasn't inserted the class in the vttree or eltree (which is not true for the netem duplicate case).

This patch checks the n_active class variable to make sure that the code won't insert the class in the vttree or eltree twice, catering for the reentrant case.

[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/

GHSA-fwvg-7877-39cm

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

net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc

This patch checks the n_active class variable to make sure that the code won't insert the class in the vttree or eltree twice, catering for the reentrant case.

[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/

msrc_CVE-2025-37890 — net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc

msrc_CVE-2025-37890

OESA-2025-2077 — kernel security update

Affected: openEuler:24.03-LTS: kernel

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

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

mac802154: check local interfaces before deleting sdata list

syzkaller reported a corrupted list in ieee802154_if_remove. [1]

Remove an IEEE 802.15.4 network interface after unregister an IEEE 802.15.4 hardware device from the system.

CPU0 CPU1 ==== ==== genl_family_rcv_msg_doit ieee802154_unregister_hw ieee802154_del_iface ieee802154_remove_interfaces rdev_del_virtual_intf_deprecated list_del(&sdata->list) ieee802154_if_remove list_del_rcu

The net device has been unregistered, since the rcu grace period, unregistration must be run before ieee802154_if_remove.

To avoid this issue, add a check for local->interfaces before deleting sdata list.

[1] kernel BUG at lib/list_debug.c:58! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 6277 Comm: syz-executor157 Not tainted 6.12.0-rc6-syzkaller-00005-g557329bcecc2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:__list_del_entry_valid_or_report+0xf4/0x140 lib/list_debug.c:56 Code: e8 a1 7e 00 07 90 0f 0b 48 c7 c7 e0 37 60 8c 4c 89 fe e8 8f 7e 00 07 90 0f 0b 48 c7 c7 40 38 60 8c 4c 89 fe e8 7d 7e 00 07 90 <0f> 0b 48 c7 c7 a0 38 60 8c 4c 89 fe e8 6b 7e 00 07 90 0f 0b 48 c7 RSP: 0018:ffffc9000490f3d0 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000122 RCX: d211eee56bb28d00 RDX:…

RHSA-2025:12209 — Red Hat Security Advisory: kernel security update

kernel: media: uvcvideo: Fix double free in error path kernel: ipv6: mcast: extend RCU protection in igmp6_send() kernel: wifi: iwlwifi: limit printed string from FW file kernel: ext4: avoid journaling sb update on error if journal is destroying kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc kernel: mm/huge_memory: fix dereferencing invalid pmd migration entry kernel: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue() kernel: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice kernel: net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done

RHSA-2025:12746 — Red Hat Security Advisory: kernel security update

kernel: misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram() kernel: padata: avoid UAF for reorder_work kernel: padata: fix UAF in padata_reorder kernel: HID: intel-ish-hid: Fix use-after-free issue in ishtp_hid_remove() kernel: HID: intel-ish-hid: Fix use-after-free issue in hid_ishtp_cl_remove() kernel: cifs: Fix integer overflow while processing closetimeo mount option kernel: memstick: rtsx_usb_ms: Fix slab-use-after-free in rtsx_usb_ms_drv_remove kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc kernel: net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done kernel: net/sched: fix use-after-free in taprio_dev_notifier

SUSE-SU-2025:01964-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2025-37890

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:Pro:18.04:LTS: linux-aws-5.4, Ubuntu:18.04:LTS: linux-azure, Ubuntu:18.04:LTS: linux-azure-5.3, Ubuntu:Pro:18.04:LTS: linux-azure-5.4, Ubuntu:18.04:LTS: linux-azure-edge, Ubuntu:18.04:LTS: linux-gcp, Ubuntu:18.04:LTS: linux-gcp-5.3 and 177 more

In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc As described in Gerrard's report [1], we have a UAF case when an hfsc class has a netem child qdisc. The crux of the issue is that hfsc is assuming that checking for cl->qdisc->q.qlen == 0 guarantees that it hasn't inserted the class in the vttree or eltree (which is not true for the netem duplicate case). This patch checks the n_active class variable to make sure that the code won't insert the class in the vttree or eltree twice, catering for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/

WID-SEC-W-2025-1098 — Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Ein lokaler Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.