UBUNTU-CVE-2026-99117

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: don't truncate the port group walk on teardown brmulticastdisableportctx and brmulticastdelport walk port-mglist with hlistforeachentrysafe. However, brmulticastfinddelpg can also delete other entries from the...

UBUNTU-CVE-2026-99121

In the Linux kernel, the following vulnerability has been resolved: ipv4: avoid divide by zero in fibrebalance fibrebalance computes the total eligible nexthop weight in one pass and programs upper bounds in a second pass. A concurrent change to ignorerouteswithlinkdown can make the first pass...

UBUNTU-CVE-2026-99127

In the Linux kernel, the following vulnerability has been resolved: pagepool: keep fragoffset aligned for odd-sized requests pagepoolallocfragnetmem rounds the requested fragment size with size = ALIGNsize, dmagetcachealignment; dmagetcachealignment returns 1 unless the architecture defines...

UBUNTU-CVE-2026-99128

In the Linux kernel, the following vulnerability has been resolved: sctp: validate chunk length in the inqueue parser SCTP chunks always include a four-byte generic header, but sctpinqpop currently accepts shorter declared lengths. A zero-length chunk leaves chunkend at the current header. When...

UBUNTU-CVE-2026-99130

In the Linux kernel, the following vulnerability has been resolved: iouring/cancel: don't spin on local work the task can't run iouringcancelgeneric refuses to sleep while any ring on the exiting task's tctx has local work pending. It assumes the task is that ring's submitter and that the next...

UBUNTU-CVE-2026-99138

In the Linux kernel, the following vulnerability has been resolved: tcp: fix use-after-free in dotcpgetsockoptTCPCCINFO dotcpgetsockopt reads icsk-icskcaops and dereferences the getinfo function pointer without rcureadlock. With BPF structops congestion control, caops can point to dynamically...

UBUNTU-CVE-2026-99139

In the Linux kernel, the following vulnerability has been resolved: tcp: fix use-after-free in dotcpgetsockoptTCPCONGESTION dotcpgetsockopt reads icsk-icskcaops-name without holding rcureadlock. Since commit 0baf26b0fcd7 "bpf: tcp: Support tcpcongestionops in bpf", icskcaops can point to...

UBUNTU-CVE-2026-99152

In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi: Validate the task named by a management response iscsicompletepdu fetches the task for five response types from one place and checks only that the index resolved: case ISCSIOPLOGOUTRSP: case ISCSIOPLOGINRSP: case...

UBUNTU-CVE-2026-99156

In the Linux kernel, the following vulnerability has been resolved: scsi: st: Fix use-after-free race between stremove and stopen stremove drops the probe reference on the scsitape with krefput and only afterwards removes its index from stindexidr. If that was the last reference, scsitaperelease...

UBUNTU-CVE-2026-99165

In the Linux kernel, the following vulnerability has been resolved: sctp: revalidate output stream after association connect wait When message interleaving is enabled, the first send waits for association establishment before building its data chunks. The wait drops the socket lock, and handshake...

UBUNTU-CVE-2026-99166

In the Linux kernel, the following vulnerability has been resolved: net: rds: fix uninitialized trans dereference in CM event handler rdsrdmacmeventhandlercmn assigns trans only when the RDMA device is an InfiniBand CA RDMANODEIBCA. On any other device type, e.g. an iWARP RNIC such as siw, trans...

UBUNTU-CVE-2026-99175

In the Linux kernel, the following vulnerability has been resolved: fsnotify: prevent mark additions during connector teardown fsnotifydestroymarks keeps a reference to its current mark while it drops conn-lock to destroy the mark. This stabilizes the forward-walk cursor, but does not prevent a n...

UBUNTU-CVE-2026-99176

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Reset MMU back to the root MMU if loading L2 state fails for !VM-Entry Reset the vCPU's MMU pointer back to the root MMU if loading L2 state fails in the "not from VM-Entry" case, i.e. when emulating RSM or handling...

UBUNTU-CVE-2026-99179

In the Linux kernel, the following vulnerability has been resolved: watchqueue: Fix note pool publication race in watchqueuesetsize There is a race between watchqueuesetsize and postonenotification. watchqueuesetsize publishes wqueue-notes, notesbitmap, nrpages and nrnotes with plain stores, and...

UBUNTU-CVE-2026-99131

In the Linux kernel, the following vulnerability has been resolved: xfs: fix capability check in xfs An user reported a bug where he managed to evade group's quota by changing a file's gid to a different group id the same user belonged to, even though quotas were enforced on both gids and the...

UBUNTU-CVE-2026-99191

In the Linux kernel, the following vulnerability has been resolved: calipso: keep BIG TCP payloadlen in calipsoskbuffsetattr calipsoskbuffsetattr adjusts payloadlen by the length of the option it inserts or resizes: payload = ntohsip6hdr-payloadlen; ip6hdr-payloadlen = htonspayload + lendelta; GR...

Important: Red Hat Security Advisory: kpatch-patch-5_14_0-570_116_1, kpatch-patch-5_14_0-570_135_1, kpatch-patch-5_14_0-570_39_1, kpatch-patch-5_14_0-570_66_1, and kpatch-patch-5_14_0-570_94_1 security update

An update for multiple packages is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. 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...

kernel: net: bridge: stop fast-leave after deleting a port group

A flaw was found in the Linux kernel's network bridge module. When handling multicast fast-leave, a vulnerability exists where the system may attempt to access a port group after it has been deleted. This can occur if multicast-to-unicast was previously enabled and then disabled, leading to a sta...

kernel: packet: use consistent hard_header_len in non-ring send paths

An out-of-bounds write problem was observed in packetsendmsgspkt in net/packet/afpacket.c in the Linux Kernel. In this flaw, AFPACKET hardheaderlen race may allow local privilege escalation...

kernel: netfilter: ebtables SNAT target writes to shared memory pages during ARP hardware address rewrite

A flaw was found in the Linux kernel's netfilter bridge ebtables SNAT Source Network Address Translation module. This vulnerability allows a local attacker on a system configured with specific bridge netfilter rules to improperly modify underlying memory pages during an ARP Address Resolution...