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 – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: netlink: added nla be16/32 types to the minlen array BUGs: KMSAN: uninit-value in nlavalidaterangeunsigned, lib/nlattr.c:222 inline BUGs: KMSAN: uninit-value in nlavalidateintrange, lib/nlattr.c:336 inline BUGs: KMSAN:...

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: netlink: terminate outstanding dump on socket close netlink supports iterative dumping of data. It provides the following operations: - start – Optional Initiates the dumping process. - dump – The actual dumping process; this...

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

In the Linux kernel, the following vulnerability has been resolved: rtnetlink: The error logic for writing back the IFLABRIDGEFLAGS flags has been fixed. In the commit d73ef2d69c0d “rtnetlink: let rtnlbridgesetlink checks IFLABRIDGEMODE length”, an adjustment was made to the old loop logic in the...

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

In the Linux kernel, the following vulnerability has been resolved: net/smc: Fixed an illegal access to rmbdesc during SMC-D connection dumping. A crash was detected when dumping SMC-D connections. This issue can be reproduced by performing the following steps: 1. Run the nginx/wrk test: smcrun...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: netlink: Annotate lockless accesses to nlk-maxrecvmsglen. syzbot reported a data race in netlinkrecvmsg. Indeed, netlinkrecvmsg can be executed concurrently, and netlinkdump also requires protection. 1 Bug: KCSAN: Data race in...

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: net/smc: Reduced Rtnl pressure in smcpnetcreatepnetidslist. Many syzbot reports indicate extreme Rtnl pressure, and many of them suggest that smc acquires Rtnl during the creation of netnames without any valid reason 1. This patc...

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 5.10

In the Linux kernel, the following vulnerability has been resolved: cfg80211: fixed a race condition in the netlink owner interface destruction process. My previous fix to address this issue created a deadlock situation, and there was a race condition where the exact same deadlock could occur...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: fixed the global out-of-bounds read in ksmbdnlpolicy. Similar to the reported issue see commit b33fb5b801c6 “net: qualcomm: rmnet: fixed global out-of-bounds in rmnetpolicy”, my local fuzzer discovered another global...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: idpf: Detaching and closing netdevs while handling a reset Protect the reset path from callbacks by setting the netdevs to detached state and closing any netdevs in UP state until the reset handling is completed. During a reset,...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: vdpa: Added a queue index attr to the vdpanlpolicy structure for checking nlattr lengths. The vdpanlpolicy structure is used to validate the nlattr during the parsing of incoming nlmsg messages. It ensures that the described...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ICE: Prevent NULL pointer dereferencing during reload Calling ethtool during reload can lead to a call trace issue, because the VSI configuration is not updated for some time, but the netdev structure remains active. To fix this...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: ethtool: netlink: Allow NULL nlattrs when getting a phydevice The ethnlreqgetPhyDev function is used to look up a phyDevice, in cases where an ethtool netlink command targets a specific phyDevice within a netDevice’s topolog...

Astra Linux – Vulnerability in Linux

A issue was discovered in the Linux kernel before version 5.8. The lib/nlattr.c file allows attackers to cause a denial of service unbounded recursion through a nested Netlink policy with a back reference...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net-shapers: Do not free the reply skb after genlmsgreply. genlmsgreply passes the reply skb to netlink, and netlinkunicast consumes it on all return paths, regardless of whether the skb is successfully queued or freed due to an...

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 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 ...