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ALSA-2026:66180 — Important: kernel security, bug fix, and enhancement update

Affected: AlmaLinux:9: kernel, AlmaLinux:9: kernel-64k, AlmaLinux:9: kernel-64k-core, AlmaLinux:9: kernel-64k-debug, AlmaLinux:9: kernel-64k-debug-core, AlmaLinux:9: kernel-64k-debug-devel, AlmaLinux:9: kernel-64k-debug-devel-matched, AlmaLinux:9: kernel-64k-debug-modules, AlmaLinux:9: kernel-64k-debug-modules-core, AlmaLinux:9: kernel-64k-debug-modules-extra and 64 more

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

Security Fix(es):

* kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133) * kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() (CVE-2026-43339) * kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493) * kernel: tcp: call sk_data_ready() after listener migration (CVE-2026-46015) * kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CVE-2026-46149) * kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP (CVE-2026-46266) * kernel: flow_dissector: do not dissect PPPoE PFC frames (CVE-2026-46306) * kernel: Revert "net/smc: Introduce TCP ULP support" (CVE-2026-46330) * kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002) * kernel: net: guard timestamp cmsgs to real error queue skbs (CVE-2026-53223) * kernel: ipv6: mcast: Fix use-after-free when processing MLD queries (CVE-2026-53275) * kernel: ipv4: account for fraggap on the paged allocation path (CVE-2026-53366) * kernel: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer (CVE-2026-64034) * kernel: rhashtable: clear stale iter->p on table restart (CVE-2026-64563) * kernel: smb: client: fix double-free in SMB2_close() replay (CVE-2026-64597) * kernel: nvmet-rdma: handle inline data with a nonzero offset (CVE-2026-72129) * kernel: net: bridge: stop fast-leave after delet…

bdu:2026-12735

BELL-CVE-2026-43339

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

certfr-2026-avi-0696 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian LTS. Certaines d'entre elles permettent à…

certfr-2026-avi-0696

EUVD-2026-347897

fkie_cve-2026-43339

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

ipv6: prevent possible UaF in addrconf_permanent_addr()

The mentioned helper try to warn the user about an exceptional condition, but the message is delivered too late, accessing the ipv6 after its possible deletion.

Reorder the statement to avoid the possible UaF; while at it, place the warning outside the idev->lock as it needs no protection.

GHSA-4v8f-jwm3-5f44

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

ipv6: prevent possible UaF in addrconf_permanent_addr()

The mentioned helper try to warn the user about an exceptional condition, but the message is delivered too late, accessing the ipv6 after its possible deletion.

Reorder the statement to avoid the possible UaF; while at it, place the warning outside the idev->lock as it needs no protection.

OESA-2026-2673 — kernel security update

Affected: openEuler:20.03-LTS-SP4: kernel

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

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

net: hamradio: fix memory leak in mkiss_close

My local syzbot instance hit memory leak in mkiss_open()[1]. The problem was in missing free_netdev() in mkiss_close().

In mkiss_open() netdevice is allocated and then registered, but in mkiss_close() netdevice was only unregistered, but not freed.

Fail log:

BUG: memory leak unreferenced object 0xffff8880281ba000 (size 4096): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*............ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

BUG: memory leak unreferenced object 0xffff8880141a9a00 (size 96): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): e8 a2 1…

openSUSE-SU-2026:21388-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

RHSA-2026:68532 — Red Hat Security Advisory: kernel-rt security update

kernel: ipvlan: Make the addrs_lock be per port kernel: xfrm: hold dev ref until after transport_finish NF_HOOK kernel: netfilter: nf_conntrack_h323: fix OOB read in decode_choice() kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP kernel: flow_dissector: do not dissect PPPoE PFC frames kernel: netfilter: xt_policy: fix strict mode inbound policy matching kernel: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls kernel: netfilter: require Ethernet MAC header before using eth_hdr() kernel: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN kernel: ALSA: timer: Fix UAF at snd_timer_user_params() kernel: net: guard timestamp cmsgs to real error queue skbs kernel: ipv6: sit: reload inner IPv6 header after GSO offloads kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() kernel: netfilter: conntrack_irc: fix possible out-of-bounds read kernel: ipv6: mcast: Fix use-after-free when processing MLD queries kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink() kernel: xfrm: input: hold netns during deferred transport reinjection kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate() kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() kernel: Linux kernel SLIP: Out-of-bounds write due to race condition during MTU change kernel: xfrm: fix stale skb->prev after async crypto steals a GSO segment kernel: net: qrt…

RLSA-2026:64775 — Important: kernel security, bug fix, and enhancement update

Affected: Rocky Linux:10: kernel

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

Security Fix(es):

* kernel: can: bcm: add locking for bcm_op runtime updates (CVE-2025-38004)

* kernel: ipv6: add NULL checks for idev in SRv6 paths (CVE-2026-23442)

* kernel: udp: Fix wildcard bind conflict check when using hash2 (CVE-2026-31503)

* kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() (CVE-2026-43339)

* kernel: tcp: call sk_data_ready() after listener migration (CVE-2026-46015)

* kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP (CVE-2026-46266)

* kernel: flow_dissector: do not dissect PPPoE PFC frames (CVE-2026-46306)

* kernel: io_uring/poll: fix signed comparison in io_poll_get_ownership() (CVE-2026-52933)

* kernel: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls (CVE-2026-53075)

* kernel: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation (CVE-2026-53277)

* kernel: ipv6: sit: reload inner IPv6 header after GSO offloads (CVE-2026-53228)

* kernel: net: add pskb_may_pull() to skb_gro_receive_list() (CVE-2026-53235)

* kernel: net: guard timestamp cmsgs to real error queue skbs (CVE-2026-53223)

* kernel: ipv6: mcast: Fix use-after-free when processing MLD queries (CVE-2026-53275)

* kernel: ipv6: anycast: insert aca into global hash under idev->lock (CVE-2026-53259)

* kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002)

*…

SUSE-SU-2026:22433-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2026-43339

Affected: Ubuntu:Pro:14.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-aws-hwe, Ubuntu:Pro:16.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-gcp, Ubuntu:Pro:16.04:LTS: linux-hwe, Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:Pro:16.04:LTS: linux-oracle, Ubuntu:Pro:18.04:LTS: linux, Ubuntu:Pro:18.04:LTS: linux-aws, Ubuntu:18.04:LTS: linux-aws-5.0 and 226 more

In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent possible UaF in addrconf_permanent_addr() The mentioned helper try to warn the user about an exceptional condition, but the message is delivered too late, accessing the ipv6 after its possible deletion. Reorder the statement to avoid the possible UaF; while at it, place the warning outside the idev->lock as it needs no protection.

WID-SEC-W-2026-1454 — Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, möglicherweise Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.