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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:2026-08902

BELL-CVE-2026-46266

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

certfr-2026-avi-0831 — De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Certaines d'entre elles permettent à un a…

certfr-2026-avi-0831

EUVD-2026-362963

fkie_cve-2026-46266

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

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP

Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous.

socket(AF_INET, SOCK_RAW, 255);

A malicious incoming ICMP packet can set the protocol field to 255 and match this socket, leading to FNHE cache changes.

inner = IP(src="192.168.2.1", dst="8.8.8.8", proto=255)/Raw("TEST") pkt = IP(src="192.168.1.1", dst="192.168.2.1")/ICMP(type=3, code=4, nexthopmtu=576)/inner

"man 7 raw" states:

A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able to send any IP protocol that is specified in the passed header. Receiving of all IP protocols via IPPROTO_RAW is not possible using raw sockets.

Make sure we drop these malicious packets.

GHSA-3vgg-pc24-vv5m

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

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP

Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous.

socket(AF_INET, SOCK_RAW, 255);

A malicious incoming ICMP packet can set the protocol field to 255 and match this socket, leading to FNHE cache changes.

inner = IP(src="192.168.2.1", dst="8.8.8.8", proto=255)/Raw("TEST") pkt = IP(src="192.168.1.1", dst="192.168.2.1")/ICMP(type=3, code=4, nexthopmtu=576)/inner

"man 7 raw" states:

Make sure we drop these malicious packets.

OESA-2026-3206 — kernel security update

Affected: openEuler:22.03-LTS-SP4: kernel

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

Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1 & X1C, Cortex-A710, Cortex-A78, A78AE & A78C, Cortex-A77, Cortex-A76 & A76A may allow writes to resources owned by a higher exception level.(CVE-2025-10263)

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

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP

Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous.

socket(AF_INET, SOCK_RAW, 255);

A malicious incoming ICMP packet can set the protocol field to 255 and match this socket, leading to FNHE cache changes.

inner = IP(src="192.168.2.1", dst="8.8.8.8", proto=255)/Raw("TEST") pkt = IP(src="192.168.1.1", dst="192.168.2.1")/ICMP(type=3, code=4, nexthopmtu=576)/inner

"man 7 raw" states:

Make sure we drop these malicious packets.(CVE-2026-46266)

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

tun: free page on build_skb failure in tun_xdp_one()

When build_skb() fails in tun_xdp_one(), the function sets ret to -…

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

Security update for the Linux Kernel

UBUNTU-CVE-2026-46266

Affected: Ubuntu:Pro:14.04:LTS: linux, Ubuntu:Pro:14.04:LTS: linux-aws, Ubuntu:Pro:14.04:LTS: linux-azure, Ubuntu:Pro:14.04:LTS: linux-lts-xenial, Ubuntu:Pro:16.04:LTS: linux, Ubuntu:Pro:16.04:LTS: linux-aws, 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 and 232 more

In the Linux kernel, the following vulnerability has been resolved: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous. socket(AF_INET, SOCK_RAW, 255); A malicious incoming ICMP packet can set the protocol field to 255 and match this socket, leading to FNHE cache changes. inner = IP(src="192.168.2.1", dst="8.8.8.8", proto=255)/Raw("TEST") pkt = IP(src="192.168.1.1", dst="192.168.2.1")/ICMP(type=3, code=4, nexthopmtu=576)/inner "man 7 raw" states: A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able to send any IP protocol that is specified in the passed header. Receiving of all IP protocols via IPPROTO_RAW is not possible using raw sockets. Make sure we drop these malicious packets.

WID-SEC-W-2026-1802 — Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen oder nicht bekannte Auswirkungen zu erzielen.