CVE-2026-63795

A flaw was found in the Linux kernel's 9p filesystem client. A reference counting error in the p9clientwalk function can lead to a use-after-free or reference count underflow. This vulnerability may allow a local attacker to cause a system crash, resulting in a Denial of Service, or potentially...

CVE-2026-63795 9p: avoid putting oldfid in p9_client_walk() error path

In the Linux kernel, the following vulnerability has been resolved: 9p: avoid putting oldfid in p9clientwalk error path When p9clientwalk is called with clone set to false, fid aliases oldfid. If the walk subsequently fails after the request has been sent, the error path jumps to clunkfid, which...

SUSE CVE-2025-37879

In the Linux kernel, the following vulnerability has been resolved: 9p/net: fix improper handling of bogus negative read/write replies In p9clientwrite and p9clientreadonce, if the server incorrectly replies with success but a negative write/read count then we would consider written negative 3...

AZL-70153 CVE-2025-37879 affecting package kernel 5.15.200.1-1

In the Linux kernel, the following vulnerability has been resolved: 9p/net: fix improper handling of bogus negative read/write replies In p9clientwrite and p9clientreadonce, if the server incorrectly replies with success but a negative write/read count then we would consider written negative 3...

UBUNTU-CVE-2025-37879

In the Linux kernel, the following vulnerability has been resolved: 9p/net: fix improper handling of bogus negative read/write replies In p9clientwrite and p9clientreadonce, if the server incorrectly replies with success but a negative write/read count then we would consider written negative 3...

CVE-2025-37879

CVE-2025-37879 affects the Linux kernel 9p/net component. Root cause: in p9_client_write() and p9_client_read_once(), a server could reply with success but a negative count due to signed variable handling, leading to incorrect conclusions about written/read data. The documented fix is to convert ...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net/9p: Fixed an issue related to uninit-value in p9clientrpc. Syzbot, with the help of KMSAN, reported the following errors: BUG: KMSAN: uninit-value in trace9pclientres, include/trace/events/9p.h:146 inline BUG: KMSAN:...