Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ipv6: fixed a race condition between ipv6getifaddr and ipv6deladdr Although ipv6getifaddr operates under the RCU lock, it still allows hlistforeachentryrcu to return an item that has already been removed from the list. The memory...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fixed an issue of signed integer overflow in l2tpip6sendmsg. When len = INTMAX - transhdrlen, the value of ulen = len + transhdrlen will cause an overflow. To address this issue, we can follow the approach used by udpv6 and...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: ipv6: avoided use-after-free in ip6fragment The blamed commit claimed that rcureadlock was held by the callers of ip6fragment. It seems not to always be true, at least for the UDP stack. syzbot reported: BUG: KASAN:...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: fixed potential NULL dereferencing in ioam6fillTraceData. We need to check in6devget for a possible NULL value, as suggested by Yiming Qian. Also, add skbdstdevrcu instead of skbdstdev, and two missing READONCE calls...

Astra Linux – Vulnerability in Linux 5.10, Linux

A vulnerability has been discovered in the Linux kernel. It has been identified as a problem. The component affected by this vulnerability is the “ipv6renewoptions” function within the IPv6 handler. This vulnerability causes a memory leak. The attack can be launched remotely. It is recommended th...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-6.1, Linux-5.15

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fixed a potential “struct net” leak in inet6rtmgetaddr. It appears that if the user space provides a correct IFATARGETNETNSID value, but no IFAADDRESS or IFALOCAL attributes are set, inet6rtmgetaddr will return -EINVAL, alo...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ipv6: Fixed infinite recursion in fib6dumpdone. syzkaller reported infinite recursive calls of fib6dumpdone during netlink socket destruction. 1 According to the log, syzkaller sent an AFUNSPEC RTMGETROUTE message, and then th...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: inetrecverror is called without holding the socket lock. The IPv6 socket could mutate to an IPv4 socket due to the IPV6ADDRFORM socket option, potentially triggering a KCSAN warning...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcu-safe version of ipv6getlladdr Some time ago, 8965779d2c0e "ipv6,mcast: always hold idev-lock before mcalock" switched ipv6getlladdr to ipv6getlladdr, which is a rcu-unsafe version. This was acceptable, as...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: ipv6: A retry logic was added in net6rtnotify. inet6rtnotify can only be called under RCU protection. This means that the route may be changed concurrently, and rt6fillnode might return -EMSGSIZE. The skb should be resized whe...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: ipv6: sr – fixed possible use-after-free and nullptrderef issues. The pernet operations structure for the subsystem must be registered before registering the generic netlink family...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: net: vxlan: Prevent NULL dereferencing in vxlanxmitone. Neither sock4 nor sock6 pointers are guaranteed to be non-NULL in vxlanxmitone, especially if the iface is disabled. This can lead to the following NULL dereferences: -...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ipvti: A potential issue related to slab-use-after-free has been fixed in decodesession6. When the ipvti device is set as a qdisc of the sfb type, the cb field of the sent skb may be modified during enqueueing. This can lead to a...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: Ensure that we call ipv6mcdown at most once. There are two reasons why addrconfnotify is called with NETDEVDOWN: Either the network device is actually going down, or IPv6 was disabled on the interface. If either of the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mptcp: The issue related to “slab-use-after-free” in inetlookupestablished has been fixed. The lookups in the ehash table are performed without locking, and they rely on SLABTYPESAFEBYRCU to ensure the stability of socket memory...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fixed another slab-out-of-bounds issue in fib6nhflushexceptions While running the self-tests on a KASAN-enabled kernel, I observed a slab-out-of-bounds issue that was very similar to the one reported in commit 821bbf79fe46...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: fix out-of-bounds read when setting HMAC data. The SRv6 layer allows defining HMAC data that can later be used to sign IPv6 Segment Routing Headers. This configuration is realized through netlink using four attributes:...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: calipso: fixed a memory leak in netlblcalipsoaddpass If IPv6 support is disabled at boot ipv6.disable=1, the calipsoinit - netlblcalipsoopsregister function is not called, and the netlblcalipsoopsget function always returns NULL...

Astra Linux – Vulnerability in avahi

In Avahi, including versions 0.6.32 and 0.7, avahi-daemon inadvertently responds to IPv6 unicast queries with source addresses that are not on-link. This allows remote attackers to cause a denial of service traffic amplification and may lead to information leakage by extracting potentially...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: ipv6: fixed a panic that occurred when forwarding a packet without an in6 dev associated with the interface. Kongweibin reported a kernel panic in ip6forward, when the input interface does not have an in6 dev associated. The...