ScreenOff

ScreenOff CVE-2026-52910 커널 크래시 poc. 참조: https://github.com/5unkn0wn/security-research/tree/CVE-2026-52910ltscosmitigation 개요 socket + SOATTACHREUSEPORTCBPF + setsockopt 레이스. timerfd/epoll 콜백 스톰이 수신 경로를 지연시킵니다. 이전 prog가 아직 사용 중일 때 cBPF 필터를 교체합니다. pipe 스프레이로 해제된 bpfprog 페이지를 재점유합니다. bpffunc = 0x0...

CVE-2026-31431

CVE-2026-31431 — NULL 포인터에서 루트 권한까지: Linux 커널의 AFALG AEAD 익스플로잇 버그 클래스: NULL 포인터 역참조 → 힙 OOB 쓰기 → 자격 증명cred 덮어쓰기 영향받는 서브시스템: net/alg/afalg.c 영향: 로컬 권한 상승비특권 사용자 → root 영향받는 커널: Linux 4.4 – 4.9패치 전 요약 커널이 사용자 공간 주소를 기대하는 위치에 NULL 포인터를 전달하면서 setsockopt를 호출합니다. 커널은 주소 0x00000000에서 읽어옵니다. 그리고 제로 페이지를...

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...

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...

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 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: xsk: Validated user input for XDPUMEM|COMPLETIONFILLRING syzbot reported an illegal copy in xsksetsockopt 1 Ensure that the @optlen parameter of setsockopt is validated. 1 BUG: KASAN: Out-of-bounds access in...

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: Bluetooth: SCO: Fixed issue where user input is not validated before calling setockopt. The syzbot reported that scosocksetsockopt copies data without checking the length of the user input. BUG: KASAN: Out-of-bounds access in...

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

In the Linux kernel, the following vulnerability has been resolved: can: j1939: Fixed a UAF in j1939skmatchfilter during setsockoptSOJ1939FILTER. Locked jsk-sk to prevent UAF when setsockopt..., SOJ1939FILTER, ... modifies jsk-filters while receiving packets. The following issue was observed on t...

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

In the Linux kernel, the following vulnerabilities have been resolved: netfilter: Validates user input to ensure it is of the expected length. I received multiple syzbot reports indicating that old bugs were exposed due to BPF after the commit 20f2505fb436 “bpf: Try to avoid kzalloc in...

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

A vulnerability was identified in the Linux Kernel versions up to 4.19.316/5.4.278/5.10.220/5.15.161. This affects the tcpgetsockopt/tcpsetsockopt functions of the TCP Handler component. Such manipulation leads to a race condition. This attack involves a high level of complexity. The vulnerabilit...

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...

Unity Linux 20.1070e Security Update: kernel (UTSA-2025-001439)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-001439 advisory. In the Linux kernel, the following vulnerability has been resolved: netfilter: validate user input for expected length I got multiple syzbot reports showing old bugs...

PT-2026-79694

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A slab-out-of-bounds read exists in the vcc setsockopt function. The issue stems from an ineffective optlen check that could be bypassed if the SO LEVEL MATCHoptname, level condition...

CVE-2026-49422

A use-after-free vulnerability exists in the tcp_rack.ko kernel module of FreeBSD operating systems. The RACK setsockopt(2) handler drops the connection lock to copy option data from userspace and reacquires it later; however, it fails to reload the pointer to the stack's per-connection control b...

CVE-2026-49422 Use-after-free in TCP RACK stack option handler

The RACK setsockopt2 handler drops the connection lock in order to copy option data from userspace, then reacquires the lock. After reacquiring, it verifies that the TCP stack had not been switched away, but did not reload its pointer to the stack's per-connection control block. If userspace...

CVE-2026-49422: Use After Free

The RACK setsockopt2 handler drops the connection lock in order to copy option data from userspace, then reacquires the lock. After reacquiring, it verifies that the TCP stack had not been switched away, but did not reload its pointer to the stack's per-connection control block. If userspace...

CVE-2026-68387

In the Linux kernel, the following vulnerability has been resolved: can: raw: add locking for raw flags bitfield With commit 890e5198a6e5 "can: raw: use bitfields to store flags in struct rawsock" the formerly separate integer values have been integrated into a single bitfield. This led to a...