CVE-2023-52927

CVE-2023-52927 LPE exploit for CVE-2023-52927 - a Use-After-Free vulnerability in netfilter. My write-up of the vulnerability: CVE-2023-52927 - Turning a Forgotten Syzkaller Report into kCTF Exploit Reproducer: KASAN trigger poc Building Install dependencies: make prerequisites Build exploit: mak...

CVE-2022-29968

CVE-2022-29968 Proof-of-concept exploit for CVE-2022-29968 uninitialized memory in the Linux Kernel, specifically the iouring system. The crash was found with Syzkaller. The crash was analyzed by Joseph Ravichandran and Michael Wang. The exploit was written by Joseph Ravichandran. We found &...

syzkaller

syzkaller - kernel fuzzer syzkaller siːzˈkɔːlə is an unsupervised coverage-guided kernel fuzzer. Supported OSes: FreeBSD, Fuchsia, gVisor, Linux, NetBSD, OpenBSD, Windows. Mailing list: [email protected] join on web or by email. Found bugs: Darwin/XNU, FreeBSD, Linux, NetBSD, OpenBSD, Window...

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 in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: Properly handling disconnections due to fastopen. Syzbot was able to trigger data stream corruption: WARNING: CPU: 0 PID: 9846 at net/mptcp/protocol.c:1024 mptcpcleanuna+0xddb/0xff0 net/mptcp/protocol.c:1024 Modules...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: kernfs: A use-after-free issue has been fixed in kernfsremove. Syzkaller managed to trigger concurrent calls to kernfsremovebynamens for the same file, resulting in a KASAN detected use-after-free. This race condition occurs...

Astra Linux - vulnerability in linux

In the Linux kernel, the following vulnerability has been resolved: pid: take a reference when initializing cadpid During boot, kernelinitfreeable initializes cadpid to the init task's struct pid. Later on, we may change cadpid via a sysctl, and when this happens procdocadpid will increment the...

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

In the Linux kernel, the following vulnerability has been resolved: arp: Prevent overflow in arpreqget. Syzkaller reported an overflow during the write operation in arpreqget. 0 When the ioctlSIOCGARP function is called, arpreqget retrieves a neighbor entry and copies neigh-ha to struct...

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

In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix uninit memory after failed miread in miformatnew Fix a KMSAN un-init bug identified by syzkaller. ntfsgetbh expects a buffer from sbgetblk; this buffer may not be up-to-date. We do not update the buffer prior to settin...

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-5.10, linux-5.15, linux

In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: Clear nfctarget before being used Fix a slab-out-of-bounds read that occurs in nlaput called from nfcgenlsendtarget when target-sensbreslen, which is duplicated from an nfctarget in pn533, is too large as the nfctarge...

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

In the Linux kernel, the following vulnerability has been resolved: wifi: ar5523: Fix use-after-free on ar5523cmd timed out syzkaller reported a use-after-free with the following stack trace 1: 38.960489 C3 ================================================================== 38.963216 C3 BUG: KASAN...

Astra Linux – vulnerability in linux-6.1

In the Linux kernel, the following vulnerability has been resolved: cdrom: Rearrange the lastmediachange check to prevent unintended overflow When running syzkaller with the newly reintroduced signed integer wrap sanitizer, we encounter this error: 366.015950 UBSAN: signed-integer-overflow in...

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

In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix possible UAF for bfqq-bic with merge chain 1 initial state, three tasks: Process 1 Process 2 Process 3 BIC1 BIC2 BIC3 | Λ | Λ | Λ | | | | | | V | V | V | bfqq1 bfqq2 bfqq3 process ref: 1 1 1 2 bfqq1 merged to bfqq...

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: TCP: Fixed corruption in MPTCP’s DSS due to large PMTU transmissions. Syzkaller was able to trigger DSS corruption: - TCP: requestsocksubflowv4: Possible SYN flooding on port :::20002. Sending cookies. ------------ Cut here...

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

In the Linux kernel, the following vulnerability has been resolved: netsched: schsfq: don't allow 1 packet limit The current implementation does not work correctly with a limit of 1. iproute2 actually checks for this and this patch adds the check in kernel as well. This fixes the following...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ax25: The refcount leak caused by setting the SOBINDTODEVICE socket option has been fixed. If an AX25 device is bound to a socket by setting the SOBINDTODEVICE socket option, a refcount leak will occur in ax25release. The commit...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: tcp: Fix tcpinittransfer so that icskcainitialized is not reset. This commit addresses a bug discovered by syzkaller. This bug could lead to spurious double-initizations for congestion control modules. This could result in memory...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: fixed the lockdep issue in qdisctreereducebacklog The qdisctreereducebacklog function is called with the qdisc lock held; this issue was not addressed in the previous version. We must use qdisclookuprcu instead of...

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

In the Linux kernel, the following vulnerabilities have been resolved: net/ipv6: avoided a possible Use After Free UAF in ip6routempathnotify syzbot discovered another use-after-free in ip6routempath Notify. 1 The commit f7225172f25a “net/ipv6: prevent use after free in ip6routempath Notify” fail...