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Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure syzbot is reporting NULL pointer dereference at hci_uart_tty_close() [1], for rcu_sync_enter() is called without rcu_sync_init() due to hci_uart_tty_open() ignoring percpu_init_rwsem() failure. While we are at it, fix that hci_uart_register_device() ignores percpu_init_rwsem() failure and hci_uart_unregister_device() does not call percpu_free_rwsem().

PUBLISHED Reserved 2025-09-17 | Published 2025-09-17 | Updated 2025-09-17 | Assigner Linux

Product status

Default status
unaffected

67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 (git) before d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4d
affected

67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 (git) before b8917dce2134739b39bc0a5648b18427f2cad569
affected

67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 (git) before 75b2c71ea581c7bb1303860d89366a42ad0506d2
affected

67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 (git) before 98ce10f3f345e61fc6c83bff9cd11cda252b05ac
affected

67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 (git) before 3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1
affected

f6ec33f6bd3723a8146768106434ef6ab3d9d990 (git)
affected

4a53c4e84ace1bc75157a7281af3fe8f5b19d08c (git)
affected

Default status
affected

4.15
affected

Any version before 4.15
unaffected

5.10.150 (semver)
unaffected

5.15.75 (semver)
unaffected

5.19.17 (semver)
unaffected

6.0.3 (semver)
unaffected

6.1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4d

git.kernel.org/...c/b8917dce2134739b39bc0a5648b18427f2cad569

git.kernel.org/...c/75b2c71ea581c7bb1303860d89366a42ad0506d2

git.kernel.org/...c/98ce10f3f345e61fc6c83bff9cd11cda252b05ac

git.kernel.org/...c/3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1

cve.org (CVE-2022-50374)

nvd.nist.gov (CVE-2022-50374)

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