------------------------------------------------------------------------- Debian LTS Advisory DLA-3245-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Ben Hutchings December 21, 2022 https://wiki.debian.org/LTS ------------------------------------------------------------------------- Package : linux Version : 4.19.269-1 CVE ID : CVE-2022-2978 CVE-2022-3521 CVE-2022-3524 CVE-2022-3564 CVE-2022-3565 CVE-2022-3594 CVE-2022-3621 CVE-2022-3628 CVE-2022-3640 CVE-2022-3643 CVE-2022-3646 CVE-2022-3649 CVE-2022-4378 CVE-2022-20369 CVE-2022-29901 CVE-2022-40768 CVE-2022-41849 CVE-2022-41850 CVE-2022-42328 CVE-2022-42329 CVE-2022-42895 CVE-2022-42896 CVE-2022-43750 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2022-2978 "butt3rflyh4ck", Hao Sun, and Jiacheng Xu reported a flaw in the nilfs2 filesystem driver which can lead to a use-after-free. A local use might be able to exploit this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-3521 The syzbot tool found a race condition in the KCM subsystem which could lead to a crash. This subsystem is not enabled in Debian's official kernel configurations. CVE-2022-3524 The syzbot tool found a race condition in the IPv6 stack which could lead to a memory leak. A local user could exploit this to cause a denial of service (memory exhaustion). CVE-2022-3564 A flaw was discovered in the Bluetooh L2CAP subsystem which would lead to a use-after-free. This might be exploitable to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-3565 A flaw was discovered in the mISDN driver which would lead to a use-after-free. This might be exploitable to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-3594 Andrew Gaul reported that the r8152 Ethernet driver would log excessive numbers of messages in response to network errors. A remote attacker could possibly exploit this to cause a denial of service (resource exhaustion). CVE-2022-3621, CVE-2022-3646 The syzbot tool found flaws in the nilfs2 filesystem driver which can lead to a null pointer dereference or memory leak. A user permitted to mount arbitrary filesystem images could use these to cause a denial of service (crash or resource exhaustion). CVE-2022-3628 Dokyung Song, Jisoo Jang, and Minsuk Kang reported a potential heap-based buffer overflow in the brcmfmac Wi-Fi driver. A user able to connect a malicious USB device could exploit this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-3640 A flaw was discovered in the Bluetooh L2CAP subsystem which would lead to a use-after-free. This might be exploitable to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-3643 (XSA-423) A flaw was discovered in the Xen network backend driver that would result in it generating malformed packet buffers. If these packets were forwarded to certain other network devices, a Xen guest could exploit this to cause a denial of service (crash or device reset). CVE-2022-3649 The syzbot tool found flaws in the nilfs2 filesystem driver which can lead to a use-after-free. A user permitted to mount arbitrary filesystem images could use these to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-4378 Kyle Zeng found a flaw in procfs that would cause a stack-based buffer overflow. A local user permitted to write to a sysctl could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-20369 A flaw was found in the v4l2-mem2mem media driver that would lead to an out-of-bounds write. A local user with access to such a device could exploit this for privilege escalation. CVE-2022-29901 Johannes Wikner and Kaveh Razavi reported that for Intel processors (Intel Core generation 6, 7 and 8), protections against speculative branch target injection attacks were insufficient in some circumstances, which may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions. More information can be found at https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/advisory-guidance/return-stack-buffer-underflow.html CVE-2022-40768 "hdthky" reported that the stex SCSI adapter driver did not fully initialise a structure that is copied to user-space. A local user with access to such a device could exploit this to leak sensitive information. CVE-2022-41849 A race condition was discovered in the smscufx graphics driver, which could lead to a use-after-free. A user able to remove the physical device while also accessing its device node could exploit this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-41850 A race condition was discovered in the hid-roccat input driver, which could lead to a use-after-free. A local user able to access such a device could exploit this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-42328, CVE-2022-42329 (XSA-424) Yang Yingliang reported that the Xen network backend driver did not use the proper function to free packet buffers in one case, which could lead to a deadlock. A Xen guest could exploit this to cause a denial of service (hang). CVE-2022-42895 Tamás Koczka reported a flaw in the Bluetooh L2CAP subsystem that would result in reading uninitialised memory. A nearby attacker able to make a Bluetooth connection could exploit this to leak sensitive information. CVE-2022-42896 Tamás Koczka reported flaws in the Bluetooh L2CAP subsystem that can lead to a use-after-free. A nearby attacker able to make a Bluetooth SMP connection could exploit this to cause a denial of service (crash or memory corruption) or possibly for remote code execution. CVE-2022-43750 The syzbot tool found that the USB monitor (usbmon) driver allowed user-space programs to overwrite the driver's data structures. A local user permitted to access a USB monitor device could exploit this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. However, by default only the root user can access such devices. For Debian 10 buster, these problems have been fixed in version 4.19.269-1. We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS -- Ben Hutchings - Debian developer, member of kernel, installer and LTS teams
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