Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: 9p: Fixed the fid refcount leak in v9fsvfsatomicopendotl. We need to release the directory fid if we fail at any point during the open operation. This fix addresses the issue of fid leaking during xfstests with the generic test 5...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: 9p: Fixed the fid refcount leak in v9fsvfsgetlink. We now check for protocol versions that are later than required, after a fid has been obtained. Simply move the version check to an earlier stage...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: 9p: Added missing locking around accessing the dentry fid list. Fixed a use-after-free issue when a thread accesses the dentry’s dfsdata fid list while another thread unlinks it from the dentry. UAF thread issues: - refcountt:...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, 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:...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/9p: A dedicated spinlock is used for transfd. I'm shamelessly copying the explanation from Tetsuo Handa’s suggested patch1 slightly reworded: syzbot reports inconsistent lock states in p9reqput2. For p9tagremove, when execute...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: 9p/transfd: Always use ONONBLOCK for read/write operations. The syzbot report indicates that tasks become hung at p9fdclose, due to p9muxpollstop. This occurs because p9connDestroy fails to interrupt kernelread/kernelwrite that...

Astra Linux – Vulnerability in Qemu

A race condition flaw was discovered in the 9pfs server implementation of QEMU, up to and including version 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The greatest threat posed by this vulnerability is to...

Astra Linux – Vulnerability in Linux 6.1

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

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: 9p: transfd/p9conn Cancel: release the client lock earlier. The syzbot reported a double-lock issue here, and we no longer need this lock after the requests have been moved to the local list. We can simply release the lock earlie...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/9p: A potential socket leak has been fixed in p9socketopen. Both p9fdcreatetcp and p9fdcreateunix will call p9socketopen. If the creation of p9transfd fails, both p9fdcreatetcp and p9fdcreateunix will return an error directly...

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...

Linux Distros Unpatched Vulnerability : CVE-2026-63795

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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 afte...

SUSE CVE-2026-63795

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...

CVE-2026-63795

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...

EUVD-2026-45461

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...

CVE-2026-63795

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...

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...

CVE-2026-63795

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...

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...

CVE-2026-63795

CVE-2026-63795 affects the Linux kernel 9p client implementation. The issue occurs when p9_client_walk() is called with clone=false and the fid aliases oldfid; if the walk fails after a request is sent, the error path may clunk the fid and destroy oldfid even when the caller still owns it, causin...