CVE-2025-68335

Ecosystem	Package	Version

Vulnerabilities

CVE-2025-68335

In the Linux kernel, the following vulnerability has been resolved: comedi: pcl818: fix null-ptr-deref in pcl818_ai_cancel() Syzbot identified an issue [1] in pcl818_ai_cancel(), which stems from the fact that in case of early device detach via pcl818_detach(), subdevice dev->read_subdev may not have initialized its pointer to &struct comedi_async as intended. Thus, any such dereferencing of &s->async->cmd will lead to general protection fault and kernel crash. Mitigate this problem by removing a call to pcl818_ai_cancel() from pcl818_detach() altogether. This way, if the subdevice setups its support for async commands, everything async-related will be handled via subdevice's own ->cancel() function in comedi_device_detach_locked() even before pcl818_detach(). If no support for asynchronous commands is provided, there is no need to cancel anything either. [1] Syzbot crash: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] CPU: 1 UID: 0 PID: 6050 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:pcl818_ai_cancel+0x69/0x3f0 drivers/comedi/drivers/pcl818.c:762 ... Call Trace: <TASK> pcl818_detach+0x66/0xd0 drivers/comedi/drivers/pcl818.c:1115 comedi_device_detach_locked+0x178/0x750 drivers/comedi/drivers.c:207 do_devconfig_ioctl drivers/comedi/comedi_fops.c:848 [inline] comedi_unlocked_ioctl+0xcde/0x1020 drivers/comedi/comedi_fops.c:2178 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] ...

Published Dec 23, 2025

https://lore.kernel.org/linux-cve-announce/2025122220-CVE-2025-68335-6742@gregkh/

CVSS ScoreMedium

4.8


rpm	kernel	4.18.0-147.0.2.el8_1
rpm	kernel	4.18.0-147.0.3.el8_1
rpm	kernel	4.18.0-147.3.1.el8_1
rpm	kernel	4.18.0-147.5.1.el8_1
rpm	kernel	4.18.0-147.8.1.el8_1
rpm	kernel	4.18.0-147.el8
rpm	kernel	4.18.0-193.1.2.el8_2
rpm	kernel	4.18.0-193.13.2.el8_2
rpm	kernel	4.18.0-193.14.3.el8_2
rpm	kernel	4.18.0-193.19.1.el8_2
rpm	kernel	4.18.0-193.28.1.el8_2
rpm	kernel	4.18.0-193.6.3.el8_2
rpm	kernel	4.18.0-193.el8
rpm	kernel	4.18.0-240.1.1.el8_3
rpm	kernel	4.18.0-240.10.1.el8_3
rpm	kernel	4.18.0-240.15.1.el8_3
rpm	kernel	4.18.0-240.22.1.el8_3
rpm	kernel	4.18.0-240.8.1.el8_3
rpm	kernel	4.18.0-240.el8
rpm	kernel	4.18.0-293.el8
rpm	kernel	4.18.0-305.10.2.el8_4
rpm	kernel	4.18.0-305.12.1.el8_4
rpm	kernel	4.18.0-305.17.1.el8_4
rpm	kernel	4.18.0-305.19.1.el8_4
rpm	kernel	4.18.0-305.25.1.el8_4
rpm	kernel	4.18.0-305.3.1.el8_4
rpm	kernel	4.18.0-305.7.1.el8_4
rpm	kernel	4.18.0-305.el8
rpm	kernel	4.18.0-348.12.2.el8_5
rpm	kernel	4.18.0-348.2.1.el8_5
rpm	kernel	4.18.0-348.20.1.el8_5
rpm	kernel	4.18.0-348.23.1.el8_5
rpm	kernel	4.18.0-348.7.1.el8_5
rpm	kernel	4.18.0-348.el8
rpm	kernel	4.18.0-372.13.1.0.1.el8_6
rpm	kernel	4.18.0-372.13.1.0.2.el8_6
rpm	kernel	4.18.0-372.16.1.0.1.el8_6
rpm	kernel	4.18.0-372.16.1.0.2.el8_6
rpm	kernel	4.18.0-372.19.1.0.1.el8_6
rpm	kernel	4.18.0-372.19.1.0.2.el8_6
rpm	kernel	4.18.0-372.26.1.0.1.el8_6
rpm	kernel	4.18.0-372.26.1.0.2.el8_6
rpm	kernel	4.18.0-372.32.1.0.1.el8_6
rpm	kernel	4.18.0-372.32.1.0.2.el8_6
rpm	kernel	4.18.0-372.9.1.0.2.el8
rpm	kernel	4.18.0-372.9.1.el8
rpm	kernel	4.18.0-425.10.1.0.1.el8_7
rpm	kernel	4.18.0-425.10.1.el8_7
rpm	kernel	4.18.0-425.13.1.0.1.el8_7
rpm	kernel	4.18.0-425.13.1.el8_7

Ecosystem	Package	Version

CVE-2025-68335 | Components Impacted | Sonatype Guide | Sonatype Guide

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CVE-2025-68335