Astra Linux – Vulnerability in Linux 5.10, Linux

There is a use-after-free vulnerability in the Linux Kernel that can be exploited to achieve local privilege escalation. To exploit this vulnerability, the CONFIGTLS or CONFIGXFRMESPINTCP kernel configuration flags must be set; however, the operation does not require any special privileges. There...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: In the net: stream module, the purge skerrorqueue operation in skstreamkillqueues has been fixed. Changheon Lee reported TCP socket leaks, with a detailed reproduction guide. It appears that we encounter TCP socket leaks in the...

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 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: fallback earlier on simult connection Syzkaller reports a simult-connect race leading to inconsistent fallback status: WARNING: CPU: 3 PID: 33 at net/mptcp/subflow.c:1515 subflowdataready+0x40b/0x7c0 net/mptcp/subflow.c:15...

Astra Linux – Vulnerability in Linux, Linux 5.10

A memory leak issue was discovered in the TCP source port generation algorithm in the net/ipv4/tcp.c file, due to the small table perturb size. This flaw may allow an attacker to leak information and may cause a denial of service problem...

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

In the Linux kernel, the following vulnerability has been resolved: net/smc: fixed the connection leak issue. There is a potential leak issue under the following execution sequence: smcrelease, smcconnectwork if sk-skstate == SMCINIT sendclcconfirim tcpabort; ... sk-skstate = SMCACTIVE...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: bpf, sockmap: Fixed a memory leak in tcpbpfsendmsg when skmsg is full. If tcpbpfsendmsg is running while skmsg is full, and skmsgalloc returns an -ENOMEM error, tcpbpfsendmsg will enter a waitformemory state. If part of the...

Astra Linux – Vulnerability in Linux 5.10, Linux

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

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

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: Ensure that sndnxt is properly initialized upon connection. Christoph reported a crash hinting at a corrupted snduna: WARNING: CPU: 1 PID: 38 at net/mptcp/protocol.c:1005 mptcpcleanuna+0x4b3/0x620...

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

In the Linux kernel, the following vulnerability has been resolved: Smack: TCP/IPv4; fixed incorrect labeling. Currently, Smack follows the labeling scheme for incoming TCP/IPv4 connections. When a connection labeled “foo” connects to a connection labeled “bar” via TCP/IPv4, “foo” always appears ...

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

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: pm: Fixed a UAF in timerdeletesync There are two paths to access mptcppmdeladdtimer, resulting in a race condition: CPU1 CPU2 ==== ==== netrxaction napipoll netlinksendmsg napipoll netlinkunicast processbacklog...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: TSO: Fix unbalanced DMA map/unmap for non-paged SKB data In cases where the non-paged data of an SKB contains a protocol header and payload that need to be transmitted on a platform where the DMA AXI address width is...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: handle large GSO sizes After the committed code below, TCP sockets and MPTCP subflows can generate egress packets that are larger than 64K. This exceeds the maximum DSS data size; the packet length is misrepresented over t...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: nbd: Always initialize struct msghdr completely. syzbot reports that the value of msg-msggetinq may be uninitialized 1. The struct msghdr has many new fields recently. We should always ensure that their values are zero by...

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

In the Linux kernel, the following vulnerabilities have been resolved: TCP/UDP: Fixed memory leaks related to sk and zerocopy SKBS with TX timestamps. Syzkaller reported 0 memory leaks of an UDP socket and ZEROCOPY SKBS. We can reproduce this issue with the following sequence: sk = socketAFINET,...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: scsi: iscsi: iscsitcp: Fixed a NULL pointer dereferencing issue when calling getpeername. A crash due to a NULL pointer occurred when freeing a socket at the same time as accessing it via sysfs. The issues are as follows: 1...

Astra Linux – Vulnerability in Linux 6.1

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 vulnerabilities have been resolved: nvme-tcp: fixed a possible use-after-free issue in the transport errorrecovery process. While nvmetcpsubmitasynceventwork checks the ctrl and queue states before preparing the AER command and scheduling iowork, this check is...

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...