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 – Vulnerability in Linux 5.10, Linux, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ila: Do not generate empty messages in ilaxlatnlcmdgetmapping. ilaxlatnlcmdgetmapping generates an empty skb, triggering a recent sanity check. Instead, an error code should be returned so that it can be handled by the user...

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

In the Linux kernel, the following vulnerability has been resolved: WireGuard: netlink: Check for a dangling peer via isdead instead of an empty list If all peers are removed using wgpeerremoveall, rather than setting peerlist to empty, the peer is added to a temporary list at the beginning of...

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

In the Linux kernel, the following vulnerability has been resolved: WireGuard: netlink: Access the device through ctx instead of peer. The previous commit fixed a bug that resulted in a NULL peer-device being dereferenced. In terms of performance, it is actually easier and faster to obtain the...

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

In the Linux kernel, the following vulnerability has been resolved: net: qualcomm: rmnet: fixed a global out-of-bounds read in rmnetpolicy The variable rmnetlinkops assigns a larger value to maxtype, which leads to a global out-of-bounds read during the parsing of netlink attributes. See the bug...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: Binder: Fixed a UAF Use-After-Free issue in bindersnetlinkreport. Transactions sent to frozen targets via bindersproctransaction return an BRTRANSACTIONPENDINGFROZEN error, but they are still treated as successful. This is becaus...

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

In the Linux kernel, the following vulnerability has been resolved: IB/IPoIB: Fix legacy IPoIB due to wrong number of queues The cited commit creates child PKEY interfaces over netlink will multiple tx and rx queues, but some devices doesn't support more than 1 tx and 1 rx queues. This causes to ...

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: netlink: fixed a potential deadlock in netlinkseterr syzbot reported a possible deadlock in netlinkseterr 1 A similar issue was fixed in commit 1d482e666b8e “netlink: disabling IRQs for netlinklocktable” in netlinklocktable Th...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtio-net: The recursive rtnllock function occurs during the probe operation. This deadlock appears in a stack trace like this: virtnetprobe rtnllock virtioconfigChangedWork netdevNotifyPeers rtnllock This occurs when the VMM...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: vdpa: Added the featuresattr attribute to vdpanlpolicy for checking the nlattr length. The vdpanlpolicy structure is used to validate the nlattr when parsing incoming nlmsg. It ensures that the described attribute produces a vali...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mptcp: never allow the PM to close a listener subflow Currently, when deleting an endpoint, the netlink PM traverses all local MPTCP sockets, regardless of their status. If an MPTCP listener socket is bound to the IP correspondin...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: cpsw: Executing the ndosetrxmode callback within a work queue Commit 1767bb2d47b7 “ipv6: mcast: Do not hold RTNL for IPV6ADDMEMBERSHIP and MCASTJOINGROUP” removed the RTNL lock for these operations. However, this change...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: afpacket: moved the call to packetdevmc out of the RCU critical section. Syzkaller reports the following issues: BUG: A sleeping function is called from an invalid context at kernel/locking/mutex.c:578 mutexlock+0x106/0xe80...

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

In the Linux kernel, the following vulnerabilities have been resolved: netlink: Annotate accesses to nlk-cbrunning Both netlinkrecvmsg and netlinknativeseqshow read nlk-cbrunning without locking it. Use READONCE in those functions. Add corresponding WRITEONCE to netlinkdump and netlinkdumpstart...

Astra Linux – Vulnerability in Linux, Linux 5.10

There is a bug in /net/nfc/netlink.c that allows an attacker to crash the Linux kernel by simulating an NFC device from user-space...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: Team: Replace the team lock with rtnl lock. Syszbot reports various ordering issues related to lower instance locks and team locks. It is recommended to use rtnl locks for protecting team devices, similar to bonding. This chan...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: macvlan: The forgotten nlapolicy has been added for IFLAMACVLANBCCUTOFF. The previous commit 954d1fa1ac93, titled “macvlan: Add netlink attribute for broadcast cutoff”, added an additional attribute named IFLAMACVLANBCCUTOFF to...

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

A use-after-free vulnerability exists in the netfilter component of the Linux kernel’s code, specifically the nftables module. This vulnerability can be exploited to achieve local privilege escalation. Due to a race condition between the netlink control plane transaction of the nftables module an...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: netlink: afnetlink: Added a check on the len parameter to prevent empty skb objects. This prevents a division error in the netemenqueue function, which occurs when skb-len=0 and skb-datalen=0 during the randomized corruption...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: nbd: The function genlunregisterfamily is called first in nbdcleanup. Otherwise, there may be a race between the removal of the module and the handling of the netlink command, which can lead to an oops as shown below: BUG: Kernel...