Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Check for any of tcpbpfprots when cloning a listener. A listening socket linked to a sockmap has its skprot overridden. It points to one of the struct proto variants in tcpbpfprots. This variant depends on the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: TCP: TX zerocopy should not access the pfmemalloc status. We received a recent syzbot report 1 indicating a possible misuse of the page status in TCP zerocopy paths. Indeed, for pages originating from user space or other layers,...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: Remove the tag set when the second admin queue configuration fails. Commit 104d0e2f6222 “nvme-fabrics: Reset the admin connection for secure concatenation” modified nvmetcpsetupctrl to call nvmetcpconfigureadminqueue...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: Fix the UaF issue in listener shutdown According to Christoph’s report after refactoring the passive socket initialization, the mptcp listener shutdown path is vulnerable to a UaF issue. BUG: KASAN: Use-after-free in...

Astra Linux – Vulnerability in Wireshark

In Wireshark versions 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20, the TCP dissector could crash. This issue was addressed in the epan/dissectors/packet-tcp.c file by changing the handling of the invalid 0xFFFF checksum...

Astra Linux – Vulnerability in Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix one UAF issue caused by sunrpc kernel tcp socket BUG: KASAN: slab-use-after-free in tcpwritetimerhandler+0x156/0x3e0 Read of size 1 at addr ffff888111f322cd by task swapper/0/0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: TCP: Fixed the issue where skbcopyubufs was used in conjunction with BIG TCP, causing crashes due to TCP tx zerocopy using hugepages, and when the skb length exceeded approximately 68 KB. skbcopyubufs assumed that it could copy a...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: inet: Sk-skrxdst was converted to RCU rules. The syzbot reported various issues related to early demux processing. One of these issues is included in this changelog 1. Sk-skrxdst uses RCU protection without proper documentatio...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: rds: tcp: Fixed an issue where a use-after-free occurred in net in reqsktimerhandler. syzkaller reported a warning regarding the netns tracker 0, followed by KASAN, SPLAT 1, and another ref tracker warning 1. syzkaller was unable...

Astra Linux – Vulnerability in libtirpc

In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that used libtirpc, as idle TCP connections were handled improperly. This could lead to an svcrun infinite loop without accepting new connections...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: Fixed an out-of-bounds condition during the parsing of TCP options. The TCP option parser in synproxy（synproxyparseoptions）could read one byte out of bounds. When the length is 1, the execution flow enters a...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mptcp: Fixed a deadlock in mptcppushpending. mptcppushPending may call mptcpFlushJoinList with a subflow socket lock held. If such a call encounters mptcpSockOptSyncAll, then mptcpSockOptSync might attempt to lock the subflow...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: Do not access a released socket during error recovery. While the error recovery mechanism is temporarily failing due to reconnect attempts, running the nvme list command causes a kernel NULL pointer derefrence by callin...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: TCP: Proper handling of extreme memory squeeze situations Testing with iperf3 using the “pasta” protocol splicer revealed a problem with how TCP handles window advertisement in extreme memory squeeze situations. Under memory...

Astra Linux – Vulnerability in open-iscsi

A issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to use the value of the Urgent pointer bytes to separate the Urgent data from the normal data. It...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mptcp: Prevent BPF from accessing lowat from a subflow socket. Alexei reported the following error: WARNING: CPU: 32, PID: 3276; in net/mptcp/subflow.c:1430; function subflowdataready+0x147/0x1c0. Linked modules: dummy,...

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, Linux

In the Linux kernel, the following vulnerability has been resolved: TCP: Fixed issues related to data races around sysctltcprecovery. When reading sysctltcprecovery, it can be changed concurrently. Therefore, we need to add READONCE to its readers...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: TCP: Fixed issues related to data races around sysctltcpl3mdevaccept. When reading sysctltcpl3mdevaccept, it can be changed concurrently. Therefore, we need to add READONCE to its readers...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: TCP: Fixed a data race around the sysctltcpnotsentlowat variable. When reading sysctltcpnotsentlowat, it can be changed concurrently. Therefore, we need to add READONCE to its reader function...