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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-90209

s390/debug: Fix deadlock during unregister

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: s390/debug: Fix deadlock during unregister Unregistering an s390dbf debug area while one of the associated debugfs files is being written to can cause a deadlock: $ echo >.../vmur/level $ rmmod vmur =================================================== debugfs write debugfs_file_get() debug_unregister() mutex_lock(debug_mutex) debugfs_remove() wait for debugfs_file_put() debug_file_ops.write() debug_input() mutex_lock(debug_mutex) ==> DEADLOCK Fix this by splitting debug_unregister() into an s390dbf and debugfs part, and running only the s390dbf part with debug_mutex locked.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 9372a82892c2caa6bccab9a4081166fa769699f8 to < a214c3dacc779b2afcb0ac9c8001e45ee4ffb2edaffected
  • 9372a82892c2caa6bccab9a4081166fa769699f8 to < 183f8f6d64bb0510070c856b9927618c53014a7baffected
  • 9372a82892c2caa6bccab9a4081166fa769699f8 to < a08b70ed2d1ec907353a72f15163b8e34ff4b2f8affected
  • 9372a82892c2caa6bccab9a4081166fa769699f8 to < 45bb341d1b73eb293e0dd43d9b72bbc8b615d0baaffected
  • 9372a82892c2caa6bccab9a4081166fa769699f8 to < 5d83f3faa3fb7f23f298cfd40382611999de5d1daffected
  • 9372a82892c2caa6bccab9a4081166fa769699f8 to < 54e1259b75d6402a1d0cfb822b9bb2c507e53dabaffected
  • 9372a82892c2caa6bccab9a4081166fa769699f8 to < 445c31ac638fd1af203d79bdf25fc0cb3149fbbcaffected
  • c68ba4a708fbd0efdc384cd29250bb292a45e559affected
  • 86f9980909f31ab205323eeeb290fe3cbb4952b4affected
  • fe5793e90d3f572a87ba67fe2f0e1679fdff14f8affected
  • e234f66168f0d50c0d28154fb983a14e85c3c526affected
  • 5.4.146 to < 5.5affected
  • 5.10.65 to < 5.11affected
  • 5.13.17 to < 5.14affected
  • 5.14.4 to < 5.15affected

Linux Linux

Default version status: affected

  • 5.15affected
  • 0 to < 5.15unaffected
  • 5.15.221 to ≤ 5.15.*unaffected
  • 6.1.188 to ≤ 6.1.*unaffected
  • 6.6.157 to ≤ 6.6.*unaffected
  • 6.12.110 to ≤ 6.12.*unaffected
  • 6.18.52 to ≤ 6.18.*unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References