🔐 CVE Alert

CVE-2026-90209

UNKNOWN 0.0

s390/debug: Fix deadlock during unregister

CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th

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.

Vendor linux
Product linux
Ecosystems
Industries
Technology
Published Sep 17, 2026
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Affected Versions

Linux / Linux
9372a82892c2caa6bccab9a4081166fa769699f8 < a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed 9372a82892c2caa6bccab9a4081166fa769699f8 < 183f8f6d64bb0510070c856b9927618c53014a7b 9372a82892c2caa6bccab9a4081166fa769699f8 < a08b70ed2d1ec907353a72f15163b8e34ff4b2f8 9372a82892c2caa6bccab9a4081166fa769699f8 < 45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba 9372a82892c2caa6bccab9a4081166fa769699f8 < 5d83f3faa3fb7f23f298cfd40382611999de5d1d 9372a82892c2caa6bccab9a4081166fa769699f8 < 54e1259b75d6402a1d0cfb822b9bb2c507e53dab 9372a82892c2caa6bccab9a4081166fa769699f8 < 445c31ac638fd1af203d79bdf25fc0cb3149fbbc c68ba4a708fbd0efdc384cd29250bb292a45e559 86f9980909f31ab205323eeeb290fe3cbb4952b4 fe5793e90d3f572a87ba67fe2f0e1679fdff14f8 e234f66168f0d50c0d28154fb983a14e85c3c526 5.4.146 < 5.5 5.10.65 < 5.11 5.13.17 < 5.14 5.14.4 < 5.15
Linux / Linux
5.15

References

NVD ↗ CVE.org ↗ EPSS Data ↗
git.kernel.org: https://git.kernel.org/stable/c/a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed git.kernel.org: https://git.kernel.org/stable/c/183f8f6d64bb0510070c856b9927618c53014a7b git.kernel.org: https://git.kernel.org/stable/c/a08b70ed2d1ec907353a72f15163b8e34ff4b2f8 git.kernel.org: https://git.kernel.org/stable/c/45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba git.kernel.org: https://git.kernel.org/stable/c/5d83f3faa3fb7f23f298cfd40382611999de5d1d git.kernel.org: https://git.kernel.org/stable/c/54e1259b75d6402a1d0cfb822b9bb2c507e53dab git.kernel.org: https://git.kernel.org/stable/c/445c31ac638fd1af203d79bdf25fc0cb3149fbbc