The vulnerability of the p9_read_work() function in the net/9p/trans_fd.c module of the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the p9readwork function in the net/9p/transfd.c module of the Linux kernel is related to errors during the update of the reference counter. Exploiting this vulnerability could allow an attacker to cause a service failure...

EUVD-2025-201640

In the Linux kernel, the following vulnerability has been resolved: 9p/transfd: p9fdrequest: kick rx thread if EPOLLIN p9readwork doesn't set Rworksched and doesn't do scheduleworkm-rq if listempty&m-reqlist. However, if the pipe is full, we need to read more data and this used to work prior to...

DEBIAN-CVE-2025-40305

In the Linux kernel, the following vulnerability has been resolved: 9p/transfd: p9fdrequest: kick rx thread if EPOLLIN p9readwork doesn't set Rworksched and doesn't do scheduleworkm-rq if listempty&m-reqlist. However, if the pipe is full, we need to read more data and this used to work prior to...

CVE-2025-40305

In the Linux kernel, the following vulnerability has been resolved: 9p/transfd: p9fdrequest: kick rx thread if EPOLLIN p9readwork doesn't set Rworksched and doesn't do scheduleworkm-rq if listempty&m-reqlist. However, if the pipe is full, we need to read more data and this used to work prior to...

Unity Linux 20.1070e Security Update: kernel (UTSA-2025-990737)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990737 advisory. In the Linux kernel, the following vulnerability has been resolved: 9p/transfd: always use ONONBLOCK read/write syzbot is reporting hung task at p9fdclose 1, for...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-990763)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990763 advisory. In the Linux kernel, the following vulnerability has been resolved: 9p: transfd/p9conncancel: drop client lock earlier syzbot reported a double-lock here and we no...

UBUNTU-CVE-2022-49768

In the Linux kernel, the following vulnerability has been resolved: 9p: transfd/p9conncancel: drop client lock earlier syzbot reported a double-lock here and we no longer need this lock after requests have been moved off to local list: just drop the lock earlier...

PT-2022-36126 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux Kernel versions prior to 5.15.80 Description: The issue is related to the 9p/trans fd functionality, where it does not always use O NONBLOCK for read/write operations. The actual impact and potential for attack have not been proven yet...

PT-2022-36583 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux Kernel versions prior to v4.9.334 Description: The issue concerns the 9p/trans fd functionality, where it does not always use O NONBLOCK for read/write operations. This is an automated identification of a potential security issue, but t...

PT-2022-36462 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux Kernel versions prior to v4.19.267 Description: The issue is related to the 9p/trans fd file, where it does not always use O NONBLOCK for read/write operations. The actual impact and attack plausibility have not yet been proven...

PT-2022-36531

Name of the Vulnerable Software and Affected Versions Linux Kernel versions prior to v4.14.300 Description The issue is related to the trans fd/p9 conn cancel function in the 9p protocol implementation, where the client lock is dropped earlier than expected. The actual impact and attack...

PT-2022-36270

Name of the Vulnerable Software and Affected Versions Linux Kernel versions prior to v5.10.156 Description The issue concerns the 9p/trans fd functionality, specifically the handling of read and write operations. It is recommended to always use O NONBLOCK for these operations. The actual impact a...

PT-2022-36125

Name of the Vulnerable Software and Affected Versions Linux Kernel versions prior to v5.15.80 Description The issue is related to the net/9p component, which uses a dedicated spinlock for trans fd. The actual impact and attack plausibility have not yet been proven. Recommendations For Linux Kerne...