CVE-2026-23050
NoneCVSS
—
EPSS
0.2%
Published
Feb 4, 2026
CISA due date
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The record
In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix a deadlock when returning a delegation during open() Ben Coddington reports seeing a hang in the following stack trace: 0 [ffffd0b50e1774e0] __schedule at ffffffff9ca05415 1 [ffffd0b50e177548] schedule at ffffffff9ca05717 2 [ffffd0b50e177558] bit_wait at ffffffff9ca061e1 3 [ffffd0b50e177568] __wait_on_bit at ffffffff9ca05cfb 4 [ffffd0b50e1775c8] out_of_line_wait_on_bit at ffffffff9ca05ea5 5 [ffffd0b50e177618] pnfs_roc at ffffffffc154207b [nfsv4] 6 [ffffd0b50e1776b8] _nfs4_proc_delegreturn at ffffffffc1506586 [nfsv4] 7 [ffffd0b50e177788] nfs4_proc_delegreturn at ffffffffc1507480 [nfsv4] 8 [ffffd0b50e1777f8] nfs_do_return_delegation at ffffffffc1523e41 [nfsv4] 9 [ffffd0b50e177838] nfs_inode_set_delegation at ffffffffc1524a75 [nfsv4] 10 [ffffd0b50e177888] nfs4_process_delegation at ffffffffc14f41dd [nfsv4] 11 [ffffd0b50e1778a0] _nfs4_opendata_to_nfs4_state at ffffffffc1503edf [nfsv4] 12 [ffffd0b50e1778c0] _nfs4_open_and_get_state at ffffffffc1504e56 [nfsv4] 13 [ffffd0b50e177978] _nfs4_do_open at ffffffffc15051b8 [nfsv4] 14 [ffffd0b50e1779f8] nfs4_do_open at ffffffffc150559c [nfsv4] 15 [ffffd0b50e177a80] nfs4_atomic_open at ffffffffc15057fb [nfsv4] 16 [ffffd0b50e177ad0] nfs4_file_open at ffffffffc15219be [nfsv4] 17 [ffffd0b50e177b78] do_dentry_open at ffffffff9c09e6ea 18 [ffffd0b50e177ba8] vfs_open at ffffffff9c0a082e 19 [ffffd0b50e177bd0] dentry_open at ffffffff9c0a0935 The issue is that the delegreturn is being asked to wait for a layout return that cannot complete because a state recovery was initiated. The state recovery cannot complete until the open() finishes processing the delegations it was given. The solution is to propagate the existing flags that indicate a non-blocking call to the function pnfs_roc(), so that it knows not to wait in this situation.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Linux | Kernel | 4.10.0 | 6.12.67 |
| openSUSE:Leap 16.0 | dtb-aarch64 | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-64kb | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-azure | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-default | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-default-base | 0 | 6.12.0-160000.27.1.160000.2.8 |
| openSUSE:Leap 16.0 | kernel-docs | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-kvmsmall | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-obs-build | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-obs-qa | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-rt | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-source | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-syms | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-zfcpdump | 0 | 6.12.0-160000.27.1 |
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