kernel: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb

A flaw was found in the Linux kernel's mac80211 Wi-Fi subsystem. This use-after-free vulnerability arises from incorrect handling of fast-RX rate data during mesh processing. This can lead to memory corruption, which an attacker could potentially exploit to cause a system crash denial of service...

CVE-2026-43503

🚨 CVE-2026-43503 — DirtyClone When Shared Memory Stops Being Shared Safely. A Local Privilege Escalation vulnerability caused by improper propagation of the SKBFLSHAREDFRAG flag inside the Linux networking stack. 📖 Overview CVE-2026-43503 , nicknamed DirtyClone , is a High Severity Local Privileg...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: net: prevented skb corruption during frag list segmentation. Ian reported several instances of skb corruption triggered by rx-gro-list, resulting in similar errors: 62.624003 BUG: kernel NULL pointer dereference, address:...

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: Ethernet: lantiqetop: fixed a double-free condition in the “detach” operation. The number of descriptors that have been released so far is never incremented, which results in the same skb being released multiple times...

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

In the Linux kernel, the following vulnerability has been resolved: phonet: fixed the rtmphonetnotify function’s skb allocation. The fillroute function stores three components in the skb: - struct rtmsg - RTADST u8 - RTAOIF u32 Therefore, rtmphonetnotify should use: NLMSGALIGNsizeofstruct rtmsg...

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

In the Linux kernel, the following vulnerability has been resolved: ipv6: fixed a possible Use-after-Allocation UAF in ip6finishoutput2. If skbexpandhead returns NULL, the skb is freed, and the associated dst/idev may also be freed. We need to hold the rcureadlock to ensure that the dst and...

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: netsched: The gsoskb list is also flushed during the -change operation. Previously, when reducing the limit of a qdisc using the -change operation, only the main skb queue was trimmed, potentially leaving packets in the gsoskb...

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: - ndisc: RCU protection was added to ndiscallocskb. - ndiscallocskb can be called without holding RTNL or RCU. RCU protection was added to avoid potential Use-after-Free UAF vulnerabilities...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ntbnetdev: Use devkfreeskbany in interrupt context. TX/RX callback handlers ntbnetdevtxhandler, ntbnetdevrxhandler can be called in interrupt context via the DMA framework after the respective DMA operations are completed...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: gve: Clearing napi-skb before devkfreeskbany In gverxfreeskb, napi-skb is incorrectly left referencing an skb after it is freed using devkfreeskbany. This can result in a subsequent call to napigetfrags returning a dangling...

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

In the Linux kernel, the following vulnerabilities have been resolved: netlink: avoided infinite retry loops in netlinkunicast The netlinkattachskb function checks the read memory allocation constraints of the socket. First, it checks whether the newly increased rmem value fits within the socket’...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: actskbedit: fix divide-by-zero in tcfskbedithash Commit 38a6f0865796 “net: sched: support hash selecting tx queue” added support for SKBEDITFTXQSKBHASH. The inclusive range size is computed as follows: mappingmod =...

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: atm: atmtcp: A free invalid length skb was encountered in atmtcpcsend. syzbot reported the issue below. 0 vccsendmsg copies data passed from the user space to a skb and passes it to vcc-dev-ops-send. atmtcpcsend accesses skb-data...

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

In the Linux kernel, the following vulnerability has been resolved: Wifi: ath9k: htchst: In the ath9khtcrxmsg function, if there is no callback function, the provided skb is not freed. It is stated that ath9khtcrxmsg either frees the provided skb or passes its management to another callback...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: sctp: A buffer overflow vulnerability exists when skbheaderpointer returns NULL in sctprcvootb. We should always check if the return value of skbheaderpointer is NULL before using it. Otherwise, it may lead to a nullptrderef...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ppp: Associating skb with a device at tx. Syzkaller triggered a flow dissector warning with the following code: c r0 = openat$ppp0xffffffffffffff9c, &0x7f0000000000, 0xc0802, 0x0 ioctl$PPPIOCNEWUNITr0, 0xc004743e,...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fixed a panic that occurred when calling skblinearize. The panic can be reproduced by executing the command: ./bench sockmap -c 2 -p 1 -a --rx-verdict-ingress --rx-strp 100000 A kernel panic was then captured: '''...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: qede: ensure that the skb is allocated before use. qedebuildskb assumes that buildskb always works and proceeds directly to skbreserve. However, buildskb may fail under memory pressure. This results in a kernel panic because the...

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: ibmvnic: Added a check for transmission to prevent skb leaks. Here’s a summary of how the driver stores a reference to an skb during transmission: 1. txbufffreemapconsumerindex-skb = newskb; 2. freemapconsumerindex =...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: esp: fixed the skb leak that occurred with espintcp and async crypto. When the TX queue for espintcp is full, espoutputtailtcp will return an error and not free the skb. This is because, with synchronous crypto, the common xfrm...