Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtionet: fixed device mismatch in devmkzalloc/devmkfree The initial rsshdr allocation uses virtiodevice-device, but virtnetsetqueues frees resources using netdevice-device. This device mismatch causes the following devres...

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

A use-after-free vulnerability exists in the Linux kernel’s net/sched: schqfq component, which can be exploited to achieve local privilege escalation. When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers a use-after-free in qfqdequeue, due to the incorrect .pe...

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

A out-of-bounds write vulnerability exists in the Linux kernel’s net/sched:schqfq component, which can be exploited to achieve local privilege escalation. The qfqchangeagg function in net/sched/schqfq.c allows for an out-of-bounds write, as lmax is updated based on packet sizes without any bounds...

Astra Linux – Vulnerability in Linux 5.10, Linux

A use-after-free flaw was discovered in vhostnetsetbackend in drivers/vhost/net.c within the virtio network subcomponent of the Linux kernel, due to a double fget operation. This flaw could allow a local attacker to cause the system to crash, and could even lead to a kernel information leak issue...

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

A issue was discovered in the Linux kernel before version 6.1.11. In net/netrom/afnetrom.c, there is a use-after-free condition, as “accept” is also allowed for a successfully connected AFNETROM socket. However, for an attacker to exploit this vulnerability, the system must have netrom routing...

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 5.10

In the Linux kernel, the following vulnerability has been resolved: net.manap: Null servicewq on setup error to prevent double destruction. In the managdsetup error path, servicewq is set to NULL after destroyworkqueue, to match the cleanup in managdcleanup. This prevents a use-after-free if the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtionet: a memory leak inside XPDTX has been fixed using mergeable. When we call xdpconvertbufftoframe to obtain xdpf, if it returns NULL, we should check whether xdppage was allocated by xdplinearizepage. If it was newly...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: dsa: don’t leak tagger-owned storage on switch driver unbind In the initial commit dc452a471dba, we had a issue where a call to tagops-disconnectdst was issued from dsatreefree, which was called during the tree teardown...

Astra Linux – Vulnerability in Linux, Linux 5.10

An improper update of the reference count vulnerability in the net/sched component of the Linux kernel allows a local attacker to escalate privileges to root. This issue affects Linux Kernel versions prior to 5.18, as well as version 4.14 and later versions...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: net: Fixed a UAF issue in nfqnlnfhookDrop when opsinit fails. When the opsinit function is called to initialize the network, but ops-init fails, data is released. However, the pointer ptr in net-gen becomes invalid. In this...

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

A use-after-free vulnerability exists in the Linux kernel’s net/sched:clsfw component, which can be exploited to achieve local privilege escalation. When the fwchange function is called on an existing filter, the entire tcfresult struct is always copied into the new instance of the filter. This...

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: ipv6: mcast: removed one synchronizenet call from ipv6mcdown. As discussed in previous discussions commit 2d3916f31891 “ipv6: fix skb drops in igmp6eventquery and igmp6eventreport”, the synchronizenet call in ipv6mcdown is not...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: hinic: fixed the issue of CMDQ memory leaks. When hinicsetcmdqdepth fails in hinicinitcmdqs, the CMDQ memory is not released correctly. This issue has been fixed...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Networks: TLS – Avoid hanging tasks when using txlock. The syzbot reported a situation where tasks were hung. Eric explains that the adversarial receiver may keep RWIN at 0 for a long time, so we cannot guarantee progress. Thread...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect the driver from buggy firmware When processing port up/down events generated by the device’s firmware, the driver attempts to protect itself from events reported for non-existent local ports. However, it...

Astra Linux – Vulnerability in Linux 5.15

A memory leak flaw was discovered in nftsetcatchallflush in net/netfilter/nftablesapi.c within the Linux Kernel. This issue may allow a local attacker to cause double-deactivation of catchall elements, which can lead to a memory leak...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel before version 5.17.1, a refcount leak bug was discovered in the net/llc/afllc.c file...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: net/smc: Fixed NULL pointer dereferencing in smcvlanbytcpsk. Coverity reports a possible NULL dereferencing issue: - In smcvlanbytcpsk: - 6. returnednull: netdevlowergetnext returns NULL checked 29 out of 30 times. - 7...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the hsofreenetdevice function in drivers/net/usb/hso.c calls unregisternetdev from version 5.13.4 onwards, without checking the NETREGREGISTERED status. This leads to a use-after-free and a double-free...