kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res->rt6 pointer

A use-after-free vulnerability was found in the Linux kernel's IPv6 FIB rule lookup path. In fib6rulesuppress, when a route is suppressed and released via ip6rtputflags, the res-rt6 pointer is not cleared. If no later rule supplies a replacement route, fib6rulelookup returns the stale freed rt6in...

USN-8819-2: Linux kernel vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Network file system NFS server daemon; - IPv6 networking; - Netfilter; CVE-2025-38724, CVE-2026-53131, CVE-2026-532...

USN-8819-2 linux-aws, linux-gcp, linux-gcp-4.15, linux-gcp-fips vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Network file system NFS server daemon; - IPv6 networking; - Netfilter; CVE-2025-38724, CVE-2026-53131, CVE-2026-532...

USN-8730-6: Linux kernel (Intel IoTG) vulnerability

A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems: - IPv6 networking; - Netfilter;...

USN-8730-6 linux-intel-iotg-5.15 vulnerability

A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems: - IPv6 networking; - Netfilter;...

DEBIAN-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...

AZL-104636 CVE-2026-98101 affecting package kernel 6.6.157.1-1

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...

DEBIAN-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...

AZL-104559 CVE-2026-98096 affecting package kernel 6.6.157.1-1

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...

AZL-104442 CVE-2026-98102 affecting package kernel 6.6.157.1-1

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...

AZL-104745 CVE-2026-98099 affecting package kernel 6.6.157.1-1

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...

DEBIAN-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-2026-98099

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

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-2026-98101

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-2026-98102

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...

DEBIAN-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...

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...

DEBIAN-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...

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...