CVE-2023-52833

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

MEDIUM

5.5

CVSS Score

Published: May 21, 2024 at 03:31 PM UTC

Updated: June 17, 2026 at 06:43 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

v < 5.10.2025.11 ≤ v < 5.15.1405.16 ≤ v < 6.1.645.3 ≤ v < 5.10.2025.3 ≤ v < 5.15.1405.3 ≤ v < 6.1.645.3 ≤ v < 6.5.135.3 ≤ v < 6.6.35.3 ≤ v < 6.76.2 ≤ v < 6.5.136.6 ≤ v < 6.6.35.3a1c49c434e15050b5dafe3b6f5cc732d4f02d657

Vendor states this is fixed in 0048ddf045bddc4dacb3e783fd869a2f8fb5be30 (fixed)

Vendor states this is fixed in 13b1ebad4c175e6a9b0748acbf133c21a15d282a (fixed)

Vendor states this is fixed in 624820f7c8826dd010e8b1963303c145f99816e9 (fixed)

Vendor states this is fixed in 9f8e4d1a4ca1179aaeb43f91f3e2a386e7e616b3 (fixed)

Vendor states this is fixed in a556f2ef556a04790f67f2fa272f1a77336d15a0 (fixed)

Vendor states this is fixed in f9de14bde56dcbb0765284c6dfc35842b021733c (fixed)

Vendor states this is fixed in 5.10.202 (unaffected)

Vendor states this is fixed in 5.15.140 (unaffected)

Vendor states this is fixed in 5.3 (unaffected)

Vendor states this is fixed in 6.1.64 (unaffected)

Vendor states this is fixed in 6.5.13 (unaffected)

Vendor states this is fixed in 6.6.3 (unaffected)