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CVE-2026-90209

s390/debug: Fix deadlock during unregister

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 9372a82892c2caa6bccab9a4081166fa769699f8
Version < a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed
Status affected
Version 9372a82892c2caa6bccab9a4081166fa769699f8
Version < 183f8f6d64bb0510070c856b9927618c53014a7b
Status affected
Version 9372a82892c2caa6bccab9a4081166fa769699f8
Version < a08b70ed2d1ec907353a72f15163b8e34ff4b2f8
Status affected
Version 9372a82892c2caa6bccab9a4081166fa769699f8
Version < 45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba
Status affected
Version 9372a82892c2caa6bccab9a4081166fa769699f8
Version < 5d83f3faa3fb7f23f298cfd40382611999de5d1d
Status affected
Version 9372a82892c2caa6bccab9a4081166fa769699f8
Version < 54e1259b75d6402a1d0cfb822b9bb2c507e53dab
Status affected
Version 9372a82892c2caa6bccab9a4081166fa769699f8
Version < 445c31ac638fd1af203d79bdf25fc0cb3149fbbc
Status affected
Version c68ba4a708fbd0efdc384cd29250bb292a45e559
Status affected
Version 86f9980909f31ab205323eeeb290fe3cbb4952b4
Status affected
Version fe5793e90d3f572a87ba67fe2f0e1679fdff14f8
Status affected
Version e234f66168f0d50c0d28154fb983a14e85c3c526
Status affected
Version 5.4.146
Version < 5.5
Status affected
Version 5.10.65
Version < 5.11
Status affected
Version 5.13.17
Version < 5.14
Status affected
Version 5.14.4
Version < 5.15
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.15
Status affected
Version 0
Version < 5.15
Status unaffected
Version <= 5.15.*
Version 5.15.221
Status unaffected
Version <= 6.1.*
Version 6.1.188
Status unaffected
Version <= 6.6.*
Version 6.6.157
Status unaffected
Version <= 6.12.*
Version 6.12.110
Status unaffected
Version <= 6.18.*
Version 6.18.52
Status unaffected
Version <= 7.2.*
Version 7.2.6
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.11
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed
https://git.kernel.org/stable/c/183f8f6d64bb0510070c856b9927618c53014a7b
https://git.kernel.org/stable/c/a08b70ed2d1ec907353a72f15163b8e34ff4b2f8
https://git.kernel.org/stable/c/45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba
https://git.kernel.org/stable/c/5d83f3faa3fb7f23f298cfd40382611999de5d1d
https://git.kernel.org/stable/c/54e1259b75d6402a1d0cfb822b9bb2c507e53dab
https://git.kernel.org/stable/c/445c31ac638fd1af203d79bdf25fc0cb3149fbbc