CVE-2025-21908

CVE-2025-21908 concerns the Linux kernel NFS subsystem. The issue arises when nfs_release_folio() can deadlock during writeback initiated by kcompactd, triggering a recursive path through NFS and the NFSD loopback on the same host. The patch adds PF_KCOMPACTD and a current_is_kcompactd() helper t...

CVE-2025-21908 NFS: fix nfs_release_folio() to not deadlock via kcompactd writeback

In the Linux kernel, the following vulnerability has been resolved: NFS: fix nfsreleasefolio to not deadlock via kcompactd writeback Add PFKCOMPACTD flag and currentiskcompactd helper to check for it so nfsreleasefolio can skip calling nfswbfolio from kcompactd. Otherwise NFS can deadlock waiting...

CVE-2025-21908 NFS: fix nfs_release_folio() to not deadlock via kcompactd writeback

In the Linux kernel, the following vulnerability has been resolved: NFS: fix nfsreleasefolio to not deadlock via kcompactd writeback Add PFKCOMPACTD flag and currentiskcompactd helper to check for it so nfsreleasefolio can skip calling nfswbfolio from kcompactd. Otherwise NFS can deadlock waiting...

CVE-2025-21908 NFS: fix nfs_release_folio() to not deadlock via kcompactd writeback

In the Linux kernel, the following vulnerability has been resolved: NFS: fix nfsreleasefolio to not deadlock via kcompactd writeback Add PFKCOMPACTD flag and currentiskcompactd helper to check for it so nfsreleasefolio can skip calling nfswbfolio from kcompactd. Otherwise NFS can deadlock waiting...

CVE-2025-21908: Improper Locking

In the Linux kernel, the following vulnerability has been resolved: NFS: fix nfsreleasefolio to not deadlock via kcompactd writeback Add PFKCOMPACTD flag and currentiskcompactd helper to check for it so nfsreleasefolio can skip calling nfswbfolio from kcompactd. Otherwise NFS can deadlock waiting...

CBL Mariner 2.0 Security Update: kernel (CVE-2024-56780)

"The version of kernel installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-56780 advisory. - In the Linux kernel, the following vulnerability has been resolved: quota: flush quotareleasework upon quot...

Linux Distros Unpatched Vulnerability : CVE-2022-49097

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - NFS: Avoid writeback threads getting stuck in mempoolalloc In a low memory situation, allow the NFS writeback code to fail without getting stuck in infinite loo...

Linux Distros Unpatched Vulnerability : CVE-2021-47492

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Red Hat Enterprise Linux - kernel: mm, thp: bail out early in collapsefile for writeback page Ubuntu Linux - mm, thp: bail out early in collapsefile for writeba...

CVE-2021-47637

In the Linux kernel, the following vulnerability has been resolved: ubifs: Fix deadlock in concurrent rename whiteout and inode writeback Following hung tasks: 77.028764 task:kworker/u8:4 state:D stack: 0 pid: 132 77.028820 Call Trace: 77.029027 schedule+0x8c/0x1b0 77.029067 mutexlock+0x50/0x60...

SUSE CVE-2024-57975

In the Linux kernel, the following vulnerability has been resolved: btrfs: do proper folio cleanup when rundelallocnocow failed BUG With CONFIGDEBUGVM set, test case generic/476 has some chance to crash with the following VMBUGONFOLIO: BTRFS error device dm-3: cowfilerange failed, start 1146880 e...

SUSE CVE-2022-49097

In the Linux kernel, the following vulnerability has been resolved: NFS: Avoid writeback threads getting stuck in mempoolalloc In a low memory situation, allow the NFS writeback code to fail without getting stuck in infinite loops in mempoolalloc...

CVE-2022-49097

In the Linux kernel, the following vulnerability has been resolved: NFS: Avoid writeback threads getting stuck in mempoolalloc In a low memory situation, allow the NFS writeback code to fail without getting stuck in infinite loops in mempoolalloc...

DEBIAN-CVE-2022-49097

In the Linux kernel, the following vulnerability has been resolved: NFS: Avoid writeback threads getting stuck in mempoolalloc In a low memory situation, allow the NFS writeback code to fail without getting stuck in infinite loops in mempoolalloc...

UBUNTU-CVE-2022-49097

In the Linux kernel, the following vulnerability has been resolved: NFS: Avoid writeback threads getting stuck in mempoolalloc In a low memory situation, allow the NFS writeback code to fail without getting stuck in infinite loops in mempoolalloc...

DEBIAN-CVE-2021-47637

In the Linux kernel, the following vulnerability has been resolved: ubifs: Fix deadlock in concurrent rename whiteout and inode writeback Following hung tasks: 77.028764 task:kworker/u8:4 state:D stack: 0 pid: 132 77.028820 Call Trace: 77.029027 schedule+0x8c/0x1b0 77.029067 mutexlock+0x50/0x60...

CVE-2021-47637

In the Linux kernel, the following vulnerability has been resolved: ubifs: Fix deadlock in concurrent rename whiteout and inode writeback Following hung tasks: 77.028764 task:kworker/u8:4 state:D stack: 0 pid: 132 77.028820 Call Trace: 77.029027 schedule+0x8c/0x1b0 77.029067 mutexlock+0x50/0x60...

UBUNTU-CVE-2021-47637

In the Linux kernel, the following vulnerability has been resolved: ubifs: Fix deadlock in concurrent rename whiteout and inode writeback Following hung tasks: 77.028764 task:kworker/u8:4 state:D stack: 0 pid: 132 77.028820 Call Trace: 77.029027 schedule+0x8c/0x1b0 77.029067 mutexlock+0x50/0x60...

CVE-2022-49097 NFS: Avoid writeback threads getting stuck in mempool_alloc()

In the Linux kernel, the following vulnerability has been resolved: NFS: Avoid writeback threads getting stuck in mempoolalloc In a low memory situation, allow the NFS writeback code to fail without getting stuck in infinite loops in mempoolalloc...

CVE-2022-49097 NFS: Avoid writeback threads getting stuck in mempool_alloc()

In the Linux kernel, the following vulnerability has been resolved: NFS: Avoid writeback threads getting stuck in mempoolalloc In a low memory situation, allow the NFS writeback code to fail without getting stuck in infinite loops in mempoolalloc...

CVE-2022-49097

In the Linux kernel, the following vulnerability has been resolved: NFS: Avoid writeback threads getting stuck in mempoolalloc In a low memory situation, allow the NFS writeback code to fail without getting stuck in infinite loops in mempoolalloc...