UBUNTU-CVE-2026-97597

In the Linux kernel, the following vulnerability has been resolved: ipv6: flowlabel: cap duplicate leases per socket ipv6flowlabelget allocates an ipv6flsocklist entry for every successful GET. The recheck path for a compatible existing flowlabel links another lease without applying any lease...

UBUNTU-CVE-2026-97984

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: Fix UDP length overflow with PMTU discover and big MTU This commit bounds cork-base.fragsize to IP6MAXMTU for UDP sockets to avoid a possible overflow of UDP length that triggers a WARN in udpsetlenshort when setsockop...

UBUNTU-CVE-2026-97974

In the Linux kernel, the following vulnerability has been resolved: ipv6: null-check fib6node before accessing in ip6delrtsiblings syzbot reported a null-ptr-deref in ip6delrtsiblings 0. The stack trace hinted towards a null dereference of rt-fib6node when fn-leaf is accessed in ip6delrtsiblings...

EUVD-2026-86933

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: fix RCU list diversion in ip6mcdel1src When removing a source filter whose count reaches zero, ip6mcdel1src unlinks psf from pmc-mcasources. If the filter was previously active, the code moved psf directly into...

CVE-2026-98102

The Linux kernel contains a vulnerability in the ipv6 multicast implementation within the ip6_mc_del1_src() function. When a source filter's count reaches zero, the code incorrectly moves the filter directly into the tombstone list by mutating psf->sf_next before an RCU grace period elapses. B...

CVE-2026-98102 ipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: fix RCU list diversion in ip6mcdel1src When removing a source filter whose count reaches zero, ip6mcdel1src unlinks psf from pmc-mcasources. If the filter was previously active, the code moved psf directly into...

CVE-2026-98102 ipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: fix RCU list diversion in ip6mcdel1src When removing a source filter whose count reaches zero, ip6mcdel1src unlinks psf from pmc-mcasources. If the filter was previously active, the code moved psf directly into...

CVE-2026-98102

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: fix RCU list diversion in ip6mcdel1src When removing a source filter whose count reaches zero, ip6mcdel1src unlinks psf from pmc-mcasources. If the filter was previously active, the code moved psf directly into...

CVE-2026-98101 ipv6: mcast: use copy-on-write RCU updates in ip6_mc_source()

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use copy-on-write RCU updates in ip6mcsource pmc-sflist is read locklessly under rcureadlock by inet6mccheck during packet reception in the UDP and RAW multicast receive paths. ip6mcsource mutated psl-sladdr and...

EUVD-2026-86932

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use copy-on-write RCU updates in ip6mcsource pmc-sflist is read locklessly under rcureadlock by inet6mccheck during packet reception in the UDP and RAW multicast receive paths. ip6mcsource mutated psl-sladdr and...

CVE-2026-98101 ipv6: mcast: use copy-on-write RCU updates in ip6_mc_source()

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use copy-on-write RCU updates in ip6mcsource pmc-sflist is read locklessly under rcureadlock by inet6mccheck during packet reception in the UDP and RAW multicast receive paths. ip6mcsource mutated psl-sladdr and...

CVE-2026-98101

The Linux kernel contains a vulnerability in the ipv6 multicast implementation where the pmc->sflist is read locklessly under rcu_read_lock() by inet6_mc_check() during packet reception in UDP and RAW multicast receive paths. The root cause is that ip6_mc_source() performs in-place mutation of...

CVE-2026-98101

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use copy-on-write RCU updates in ip6mcsource pmc-sflist is read locklessly under rcureadlock by inet6mccheck during packet reception in the UDP and RAW multicast receive paths. ip6mcsource mutated psl-sladdr and...

CVE-2026-98099

The Linux kernel contains a vulnerability in the net/ipv6/mcast.c component where RCU-protected lists (specifically np->ipv6_mc_list , idev->mc_list , and idev->mc_tomb ) are updated using direct pointer assignments instead of the required rcu_assign_pointer() function. This occurs in fu...

CVE-2026-98099 ipv6: mcast: use rcu_assign_pointer() for __rcu list updates

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcuassignpointer for rcu list updates Several places in net/ipv6/mcast.c update RCU-protected lists np-ipv6mclist, idev-mclist, idev-mctomb using direct pointer assignments instead of rcuassignpointer: 1. In...

EUVD-2026-86929

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcuassignpointer for rcu list updates Several places in net/ipv6/mcast.c update RCU-protected lists np-ipv6mclist, idev-mclist, idev-mctomb using direct pointer assignments instead of rcuassignpointer: 1. In...

CVE-2026-98099 ipv6: mcast: use rcu_assign_pointer() for __rcu list updates

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcuassignpointer for rcu list updates Several places in net/ipv6/mcast.c update RCU-protected lists np-ipv6mclist, idev-mclist, idev-mctomb using direct pointer assignments instead of rcuassignpointer: 1. In...

CVE-2026-98099

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcuassignpointer for rcu list updates Several places in net/ipv6/mcast.c update RCU-protected lists np-ipv6mclist, idev-mclist, idev-mctomb using direct pointer assignments instead of rcuassignpointer: 1. In...

CVE-2026-98096 ipv6: sr: restore network header before routing and forwarding

In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: restore network header before routing and forwarding ipv6srhrcv runs with skb-data at the Segment Routing Header SRH while skbnetworkheader points at the IPv6 header. When segmentsleft 0, ipv6srhrcv previously restored...

CVE-2026-98096

The Linux kernel contains a vulnerability in its IPv6 Segment Routing (SR) handling. The ipv6_srh_rcv() function incorrectly calculates the skb->data position by assuming the SRH immediately follows the fixed IPv6 header. If a preceding extension header (e.g., Hop-by-Hop options ) exists, skb_...