CVE-2026-31431

CVE-2026-31431 — From a NULL Pointer to Root: Exploiting AFALG AEAD in the Linux Kernel Bug class: Null pointer dereference → heap OOB write → credential overwrite Affected subsystem: net/alg/afalg.c Impact: Local Privilege Escalation unprivileged user → root Affected kernels: Linux 4.4 – 4.9...

ScreenOff

ScreenOff CVE-2026-52910 kernel crash poc. ref: https://github.com/5unkn0wn/security-research/tree/CVE-2026-52910ltscosmitigation what socket + SOATTACHREUSEPORTCBPF + setsockopt race. timerfd/epoll callback storm slows down the receive path. replace the cBPF filter while the old prog is still in...

DEBIAN-CVE-2026-99139

In the Linux kernel, the following vulnerability has been resolved: tcp: fix use-after-free in dotcpgetsockoptTCPCONGESTION dotcpgetsockopt reads icsk-icskcaops-name without holding rcureadlock. Since commit 0baf26b0fcd7 "bpf: tcp: Support tcpcongestionops in bpf", icskcaops can point to...

CVE-2026-99139 tcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION)

In the Linux kernel, the following vulnerability has been resolved: tcp: fix use-after-free in dotcpgetsockoptTCPCONGESTION dotcpgetsockopt reads icsk-icskcaops-name without holding rcureadlock. Since commit 0baf26b0fcd7 "bpf: tcp: Support tcpcongestionops in bpf", icskcaops can point to...

CVE-2026-99139: Linux: In the Linux kernel, the following vulnerability has been resolved: tcp: fix use-after-free in…

In the Linux kernel, the following vulnerability has been resolved: tcp: fix use-after-free in dotcpgetsockoptTCPCONGESTION dotcpgetsockopt reads icsk-icskcaops-name without holding rcureadlock. Since commit 0baf26b0fcd7 "bpf: tcp: Support tcpcongestionops in bpf", icskcaops can point to...

PT-2026-117020

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the network subsystem where the SO RESERVE MEM socket option was incorrectly permitted for both TCP and UDP sockets. Because SO RESERVE MEM and sk unused reserved mem...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: hcisock: Fixed an issue where user input was not validated. The length of user input was checked before copying data...

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

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: L2CAP: Fixed an issue where user input was not validated. The length of user input was checked before data was copied...

Astra Linux – vulnerability in linux, linux-5.10, linux-5.15, linux-6.1

In the Linux kernel, the following vulnerability has been resolved: can: j1939: Fix UAF in j1939skmatchfilter during setsockoptSOJ1939FILTER Lock jsk-sk to prevent UAF when setsockopt..., SOJ1939FILTER, ... modifies jsk-filters while receiving packets. Following trace was seen on affected system:...

Astra Linux – vulnerability in linux-5.10, linux-6.1, linux, linux-5.15

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: Fix not validating setsockopt user input syzbot reported that scosocksetsockopt copies data without checking the length of user input. BUG: KASAN: slab-out-of-bounds in copyfromsockptroffset...

Astra Linux – vulnerability in linux-5.10, linux-6.1, linux-5.15

In the Linux kernel, the following vulnerability has been resolved: netfilter: validate user input for expected length I received multiple syzbot reports indicating that old bugs exposed by BPF after commit 20f2505fb436 “bpf: Try to avoid kzalloc in cgroup/s,getsockopt” The optlen argument passed...

Astra Linux – vulnerability in linux-5.10, linux-6.1, linux, linux-5.15

In the Linux kernel, the following vulnerability has been resolved: xsk: validate user input for XDPUMEM|COMPLETIONFILLRING syzbot reported an illegal copy in xsksetsockopt 1 Make sure to validate the setsockopt @optlen parameter. 1 BUG: KASAN: slab-out-of-bounds in copyfromsockptroffset...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: Bluetooth: ISO: Fixed a issue where user input was not validated using setsockopt. The length of user input was checked before data was copied...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: nfc: llcp: fixed unsafe copies in nfcllcpsetsockopt syzbot reported unsafe calls to copyfromsockptr 1 Use copysafefromsockptr instead. 1 BUG: KASAN: out-of-bounds access in copyfromsockptroffset include/linux/sockptr.h:49 inli...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ax25: rcu protect dev-ax25ptr syzbot identified a lockdep issue 1. We should remove the ax25 RTNL dependency in ax25setsockopt. This should also fix various potential UAF issues in ax25. 1 WARNING: A circular locking dependenc...

CVE-2026-90093

A flaw was found in the Linux kernel's Bluetooth L2CAP Logical Link Control and Adaptation Protocol component. This vulnerability allows for a Use-After-Free UAF condition when handling getsockopt and setsockopt operations. An attacker could exploit this by causing the system to attempt to access...

kernel: tls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock()

A flaw was found in the Linux kernel’s TLS implementation net/tls/tlsdevice.c. The function getnetdevforsock is invoked during setsockopt, which is not executed under RCU Read-Copy-Update protection. It previously used skdstgetsk-dev, which can lead to a use-after-free UAF if the sk’s destination...

CVE-2026-90093 Bluetooth: L2CAP: access chan->conn safely in get/setsockopt

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: access chan-conn safely in get/setsockopt Since commit b66774b48dd9 "Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref" l2capchan::conn has held reference and remains non-NULL also after the...

CVE-2026-90093 Bluetooth: L2CAP: access chan->conn safely in get/setsockopt

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: access chan-conn safely in get/setsockopt Since commit b66774b48dd9 "Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref" l2capchan::conn has held reference and remains non-NULL also after the...

PT-2026-94441

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Bluetooth L2CAP implementation where l2cap chan::conn retains a reference and remains non-NULL even after the associated hci conn is deleted. Accessing fields such...