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    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Thu, 08 Oct 2026 22:46:04 +0000</lastBuildDate>
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      <title>CVE-2026-23050 — pNFS: Fix a deadlock when returning a delegation during open()</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-23050</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;pNFS: Fix a deadlock when returning a delegation during open()&lt;/p&gt;
&lt;p&gt;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…&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;pNFS: Fix a deadlock when returning a delegation during open()&lt;/p&gt;
&lt;p&gt;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…&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-23050</guid>
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