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...

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 &...

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 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 found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: In the net subsystem, hsr: rejecting HSR frames if skb cannot hold the tag. Receiving an HSR frame with insufficient space to hold the HSR tag in the skb can result in a crash kernel bug. 45.390915 skbuff: skbunderpanic:...

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-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 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 – 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 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net: Handling of integer overflows in kmallocreserve The committed change was as follows: c ptr = kmallocsize; if ptr size = ksizeptr; size = kmallocsizeroundupsize; ptr = kmallocsize; This caused various crashes, as reported ...

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

In the Linux kernel, the following vulnerabilities have been resolved: gtp: Fixed a use-after-free in gtpencapdestroy. syzkaller reported a use-after-free in gtpencapdestroy. The same process freed “sk” and accessed it illegally. The commit e198987e7dd7 “gtp: fix suspicious RCU usage” added...

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 – 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, linux-5.10, linux-5.15, linux-6.1

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: acquire rcureadlock in instancedestroyrcu syzbot reported that nfreinject could be called without rcureadlock : WARNING: suspicious RCU usage 6.9.0-rc7-syzkaller-02060-g5c1672705a1a 0 Not tainted...

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

In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: do not allow overwriting ENDPOINT0 attributes A bad USB device can construct a service connection response message with the target endpoint being ENDPOINT0, which is reserved for HTCCTRLRSVDSVC and should not be...

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 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 – 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...

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...