CVE-2026-90209 (GCVE-0-2026-90209)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:07 – Updated: 2026-09-17 16:07
VLAI
Title
s390/debug: Fix deadlock during unregister
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9372a82892c2caa6bccab9a4081166fa769699f8 , < a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed (git)
Affected: 9372a82892c2caa6bccab9a4081166fa769699f8 , < 183f8f6d64bb0510070c856b9927618c53014a7b (git)
Affected: 9372a82892c2caa6bccab9a4081166fa769699f8 , < a08b70ed2d1ec907353a72f15163b8e34ff4b2f8 (git)
Affected: 9372a82892c2caa6bccab9a4081166fa769699f8 , < 45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba (git)
Affected: 9372a82892c2caa6bccab9a4081166fa769699f8 , < 5d83f3faa3fb7f23f298cfd40382611999de5d1d (git)
Affected: 9372a82892c2caa6bccab9a4081166fa769699f8 , < 54e1259b75d6402a1d0cfb822b9bb2c507e53dab (git)
Affected: 9372a82892c2caa6bccab9a4081166fa769699f8 , < 445c31ac638fd1af203d79bdf25fc0cb3149fbbc (git)
Affected: c68ba4a708fbd0efdc384cd29250bb292a45e559 (git)
Affected: 86f9980909f31ab205323eeeb290fe3cbb4952b4 (git)
Affected: fe5793e90d3f572a87ba67fe2f0e1679fdff14f8 (git)
Affected: e234f66168f0d50c0d28154fb983a14e85c3c526 (git)
Affected: 5.4.146 , < 5.5 (semver)
Affected: 5.10.65 , < 5.11 (semver)
Affected: 5.13.17 , < 5.14 (semver)
Affected: 5.14.4 , < 5.15 (semver)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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        "vulnStatus": "Received"
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}



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