kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC

A flaw was found in the Linux kernel's NFSv4 implementation. A local user could exploit a vulnerability where opening a file with OTRUNC truncate and ORDONLY read-only flags would bypass the necessary write permission checks. This oversight allows an attacker to truncate a file without having...

kernel: NFSv4/flexfiles: reject zero filehandle version count

A flaw was found in the Linux kernel's NFSv4 Network File System version 4 flexfiles component. This vulnerability occurs when the fflayoutalloclseg function processes a malformed flexfiles layout that specifies a zero filehandle version count. An attacker could exploit this by providing a...

kernel: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr

A flaw was found in the Linux kernel's NFSv4/pNFS implementation. The nfs4decodempdsaddr function, responsible for decoding network address information, does not properly handle zero-length raddr opaque data. A malicious or compromised metadata server can exploit this by providing a zero-length...

kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC

A flaw was found in the Linux kernel's NFSv4 implementation. A local user could exploit a vulnerability where opening a file with OTRUNC truncate and ORDONLY read-only flags would bypass the necessary write permission checks. This oversight allows an attacker to truncate a file without having...

kernel: NFSv4/flexfiles: reject zero filehandle version count

A flaw was found in the Linux kernel's NFSv4 Network File System version 4 flexfiles component. This vulnerability occurs when the fflayoutalloclseg function processes a malformed flexfiles layout that specifies a zero filehandle version count. An attacker could exploit this by providing a...

kernel: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr

A flaw was found in the Linux kernel's NFSv4/pNFS implementation. The nfs4decodempdsaddr function, responsible for decoding network address information, does not properly handle zero-length raddr opaque data. A malicious or compromised metadata server can exploit this by providing a zero-length...

kernel: NFSv4/flexfiles: reject zero filehandle version count

A flaw was found in the Linux kernel's NFSv4 Network File System version 4 flexfiles component. This vulnerability occurs when the fflayoutalloclseg function processes a malformed flexfiles layout that specifies a zero filehandle version count. An attacker could exploit this by providing a...

kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC

A flaw was found in the Linux kernel's NFSv4 implementation. A local user could exploit a vulnerability where opening a file with OTRUNC truncate and ORDONLY read-only flags would bypass the necessary write permission checks. This oversight allows an attacker to truncate a file without having...

kernel: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr

A flaw was found in the Linux kernel's NFSv4/pNFS implementation. The nfs4decodempdsaddr function, responsible for decoding network address information, does not properly handle zero-length raddr opaque data. A malicious or compromised metadata server can exploit this by providing a zero-length...

CVE-2026-31402

🛡️ CVE-2026-31402 – Переполнение кучи в кэше повторного воспроизведения блокировок NFSv4 CVE-2026-31402: Ошибка Linux NFS, скрывавшаяся 23 года 📌 Обзор CVE-2026-31402 — это уязвимость переполнения кучи в кэше повторного воспроизведения блокировок NFSv4.0 ядра Linux. Она возникает из-за неправильно...

kernel: NFSv4/flexfiles: reject zero filehandle version count

A flaw was found in the Linux kernel's NFSv4 Network File System version 4 flexfiles component. This vulnerability occurs when the fflayoutalloclseg function processes a malformed flexfiles layout that specifies a zero filehandle version count. An attacker could exploit this by providing a...

kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC

A flaw was found in the Linux kernel's NFSv4 implementation. A local user could exploit a vulnerability where opening a file with OTRUNC truncate and ORDONLY read-only flags would bypass the necessary write permission checks. This oversight allows an attacker to truncate a file without having...

kernel: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr

A flaw was found in the Linux kernel's NFSv4/pNFS implementation. The nfs4decodempdsaddr function, responsible for decoding network address information, does not properly handle zero-length raddr opaque data. A malicious or compromised metadata server can exploit this by providing a zero-length...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098913)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098913 advisory. In the Linux kernel, the following vulnerability has been resolved: NFSv4/flexfiles: reject zero filehandle version count fflayoutalloclseg decodes the...

Important: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: NFSv4/flexfiles: reject zero filehandle version count CVE-2026-53392 In the Linux kernel, the following vulnerability has been resolved: nfsd: reset write verifier on deferred writeback errors CVE-2026-53393 In th...

Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2026-113 (ALASKERNEL-5.15-2026-113)

The version of kernel installed on the remote host is prior to 5.15.213-150.251. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2026-113 advisory. In the Linux kernel, the following vulnerability has been resolved: NFSv4/flexfiles: reject zero...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-099704)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-099704 advisory. In the Linux kernel, the following vulnerability has been resolved: NFSv4: include MAYWRITE in open permission mask for OTRUNC POSIX requires write permission to...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-100509)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-100509 advisory. In the Linux kernel, the following vulnerability has been resolved: NFSv4: include MAYWRITE in open permission mask for OTRUNC POSIX requires write permission to...

CVE-2026-74315

CVE-2026-74315 (Linux kernel) : The vulnerability arises in lockd/nlm4svc_lookup_file where file_handle hashing used the first LOCKD_FH_HASH_SIZE bytes of nfs_fh.data regardless of fh.size, causing inconsistent bucket lookups when a client presents a shorter file handle. A commit changed populati...

CVE-2026-72472 nfs: use nfsi->rwsem to protect traversal of the file lock list

In the Linux kernel, the following vulnerability has been resolved: nfs: use nfsi-rwsem to protect traversal of the file lock list Lingfeng identified a bug and suggested two solutions, but both appear to have issues. Generally, we cannot release flclock while iterating over the file lock list to...