CVE-2023-52833

Bluetooth: btusb: Add date->evt_skb is NULL check

State: Published
Severity: Not scored
Published: May 21, 2024
Updated: May 11, 2026
Reserved: May 21, 2024

Description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: btusb: Add date->evt_skb is NULL check

fix crash because of null pointers

[ 6104.969662] BUG: kernel NULL pointer dereference, address: 00000000000000c8 [ 6104.969667] #PF: supervisor read access in kernel mode [ 6104.969668] #PF: error_code(0x0000) - not-present page [ 6104.969670] PGD 0 P4D 0 [ 6104.969673] Oops: 0000 [#1] SMP NOPTI [ 6104.969684] RIP: 0010:btusb_mtk_hci_wmt_sync+0x144/0x220 [btusb] [ 6104.969688] RSP: 0018:ffffb8d681533d48 EFLAGS: 00010246 [ 6104.969689] RAX: 0000000000000000 RBX: ffff8ad560bb2000 RCX: 0000000000000006 [ 6104.969691] RDX: 0000000000000000 RSI: ffffb8d681533d08 RDI: 0000000000000000 [ 6104.969692] RBP: ffffb8d681533d70 R08: 0000000000000001 R09: 0000000000000001 [ 6104.969694] R10: 0000000000000001 R11: 00000000fa83b2da R12: ffff8ad461d1d7c0 [ 6104.969695] R13: 0000000000000000 R14: ffff8ad459618c18 R15: ffffb8d681533d90 [ 6104.969697] FS: 00007f5a1cab9d40(0000) GS:ffff8ad578200000(0000) knlGS:00000 [ 6104.969699] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6104.969700] CR2: 00000000000000c8 CR3: 000000018620c001 CR4: 0000000000760ef0 [ 6104.969701] PKRU: 55555554 [ 6104.969702] Call Trace: [ 6104.969708] btusb_mtk_shutdown+0x44/0x80 [btusb] [ 6104.969732] hci_dev_do_close+0x470/0x5c0 [bluetooth] [ 6104.969748] hci_rfkill_set_block+0x56/0xa0 [bluetooth] [ 6104.969753] rfkill_set_block+0x92/0x160 [ 6104.969755] rfkill_fop_write+0x136/0x1e0 [ 6104.969759] __vfs_write+0x18/0x40 [ 6104.969761] vfs_write+0xdf/0x1c0 [ 6104.969763] ksys_write+0xb1/0xe0 [ 6104.969765] __x64_sys_write+0x1a/0x20 [ 6104.969769] do_syscall_64+0x51/0x180 [ 6104.969771] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 6104.969773] RIP: 0033:0x7f5a21f18fef [ 6104.9] RSP: 002b:00007ffeefe39010 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [ 6104.969780] RAX: ffffffffffffffda RBX: 000055c10a7560a0 RCX: 00007f5a21f18fef [ 6104.969781] RDX: 0000000000000008 RSI: 00007ffeefe39060 RDI: 0000000000000012 [ 6104.969782] RBP: 00007ffeefe39060 R08: 0000000000000000 R09: 0000000000000017 [ 6104.969784] R10: 00007ffeefe38d97 R11: 0000000000000293 R12: 0000000000000002 [ 6104.969785] R13: 00007ffeefe39220 R14: 00007ffeefe391a0 R15: 000055c10a72acf0

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before 9f8e4d1a4ca1179aaeb43f91f3e2a386e7e616b3Affected a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before f9de14bde56dcbb0765284c6dfc35842b021733cAffected a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before a556f2ef556a04790f67f2fa272f1a77336d15a0Affected a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before 0048ddf045bddc4dacb3e783fd869a2f8fb5be30Affected a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before 13b1ebad4c175e6a9b0748acbf133c21a15d282aAffected a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before 624820f7c8826dd010e8b1963303c145f99816e9Affected
LinuxLinux	5.3Affected before 5.3Not affected 5.10.202 through 5.10.Not affected 5.15.140 through 5.15.Not affected 6.1.64 through 6.1.Not affected 6.5.13 through 6.5.Not affected 6.6.3 through 6.6.*Not affected 6.7 and laterNot affected

Product

Versions

LinuxLinux

a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before 9f8e4d1a4ca1179aaeb43f91f3e2a386e7e616b3Affected
a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before f9de14bde56dcbb0765284c6dfc35842b021733cAffected
a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before a556f2ef556a04790f67f2fa272f1a77336d15a0Affected
a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before 0048ddf045bddc4dacb3e783fd869a2f8fb5be30Affected
a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before 13b1ebad4c175e6a9b0748acbf133c21a15d282aAffected
a1c49c434e15050b5dafe3b6f5cc732d4f02d657 to before 624820f7c8826dd010e8b1963303c145f99816e9Affected

LinuxLinux

5.3Affected
before 5.3Not affected
5.10.202 through 5.10.*Not affected
5.15.140 through 5.15.*Not affected
6.1.64 through 6.1.*Not affected
6.5.13 through 6.5.*Not affected
6.6.3 through 6.6.*Not affected
6.7 and laterNot affected

References

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