What is CVE-2022-48634?

CVE-2022-48634 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.3 out of 10, classified as a Improper Locking flaw (CWE-667), affecting Linux kernel versions from 5.6 onward and patched in 5.10.146, 5.15.71, 5.19.12 and others. CVE-2022-48634 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-48634?

CVE-2022-48634 has a CVSS score of 5.3 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Is there a patch available for CVE-2022-48634?

Yes, CVE-2022-48634 has been patched. Fixed versions include 5.10.146, 5.15.71, 5.19.12 and others. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-48634 actively exploited?

CVE-2022-48634 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/667.html

CVE-2022-48634

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/gma500: Fix BUG: sleeping function called from invalid context errors gma_crtc_page_flip() was holding the event_lock spinlock while calling crtc_funcs->mode_set_base() which takes ww_mutex. The only reason to hold event_lock is to clear gma_crtc->page_flip_event on mode_set_base() errors. Instead unlock it after setting gma_crtc->page_flip_event and on errors re-take the lock and clear gma_crtc->page_flip_event it it is still set. This fixes the following WARN/stacktrace: [ 512.122953] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:870 [ 512.123004] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1253, name: gnome-shell [ 512.123031] preempt_count: 1, expected: 0 [ 512.123048] RCU nest depth: 0, expected: 0 [ 512.123066] INFO: lockdep is turned off. [ 512.123080] irq event stamp: 0 [ 512.123094] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 512.123134] hardirqs last disabled at (0): [<ffffffff8d0ec28c>] copy_process+0x9fc/0x1de0 [ 512.123176] softirqs last enabled at (0): [<ffffffff8d0ec28c>] copy_process+0x9fc/0x1de0 [ 512.123207] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 512.123233] Preemption disabled at: [ 512.123241] [<0000000000000000>] 0x0 [ 512.123275] CPU: 3 PID: 1253 Comm: gnome-shell Tainted: G W 5.19.0+ #1 [ 512.123304] Hardware name: Packard Bell dot s/SJE01_CT, BIOS V1.10 07/23/2013 [ 512.123323] Call Trace: [ 512.123346] <TASK> [ 512.123370] dump_stack_lvl+0x5b/0x77 [ 512.123412] __might_resched.cold+0xff/0x13a [ 512.123458] ww_mutex_lock+0x1e/0xa0 [ 512.123495] psb_gem_pin+0x2c/0x150 [gma500_gfx] [ 512.123601] gma_pipe_set_base+0x76/0x240 [gma500_gfx] [ 512.123708] gma_crtc_page_flip+0x95/0x130 [gma500_gfx] [ 512.123808] drm_mode_page_flip_ioctl+0x57d/0x5d0 [ 512.123897] ? drm_mode_cursor2_ioctl+0x10/0x10 [ 512.123936] drm_ioctl_kernel+0xa1/0x150 [ 512.123984] drm_ioctl+0x21f/0x420 [ 512.124025] ? drm_mode_cursor2_ioctl+0x10/0x10 [ 512.124070] ? rcu_read_lock_bh_held+0xb/0x60 [ 512.124104] ? lock_release+0x1ef/0x2d0 [ 512.124161] __x64_sys_ioctl+0x8d/0xd0 [ 512.124203] do_syscall_64+0x58/0x80 [ 512.124239] ? do_syscall_64+0x67/0x80 [ 512.124267] ? trace_hardirqs_on_prepare+0x55/0xe0 [ 512.124300] ? do_syscall_64+0x67/0x80 [ 512.124340] ? rcu_read_lock_sched_held+0x10/0x80 [ 512.124377] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 512.124411] RIP: 0033:0x7fcc4a70740f [ 512.124442] Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 18 48 8b 44 24 18 64 48 2b 04 25 28 00 00 [ 512.124470] RSP: 002b:00007ffda73f5390 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 512.124503] RAX: ffffffffffffffda RBX: 000055cc9e474500 RCX: 00007fcc4a70740f [ 512.124524] RDX: 00007ffda73f5420 RSI: 00000000c01864b0 RDI: 0000000000000009 [ 512.124544] RBP: 00007ffda73f5420 R08: 000055cc9c0b0cb0 R09: 0000000000000034 [ 512.124564] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000c01864b0 [ 512.124584] R13: 0000000000000009 R14: 000055cc9df484d0 R15: 000055cc9af5d0c0 [ 512.124647] </TASK>

Package Linux Kernel

Published 2024-04-28

Last modified 2025-03-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.3

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness type

CWE-667

CVE-2022-48634 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.6 and later are affected. Fixed in 5.10.146, 5.15.71, 5.19.12, 6.0 and their respective stable series.

Affected from

≥ 5.6

Fixed in

✓ 5.10.146 5.10.x ✓ 5.15.71 5.15.x ✓ 5.19.12 5.19.x ✓ 6.0

References

4 total

Kernel Git
https://git.kernel.org/stable/c/63e37a79f7bd939314997e29c2f5a9f0ef184281

Patch
Kernel Git
https://git.kernel.org/stable/c/a6ed7624bf4d0a32f2631e74828bca7b7bf15afd

Patch
Kernel Git
https://git.kernel.org/stable/c/c5812807e416618477d1bb0049727ce8bb8292fd

Patch
Kernel Git
https://git.kernel.org/stable/c/e5ae504c8623476e13032670f1a6d6344d53ec9b

Patch

Details

CVE ID CVE-2022-48634

Severity Medium

CVSS score 5.3 / 10

CVSS version 3.1

Published 2024-04-28

Modified 2025-03-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-48634?

CVE-2022-48634 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.3 out of 10 , classified as an Improper Locking flaw (CWE-667) . It affects Linux kernel versions from 5.6 onward and has been patched in 5.10.146, 5.15.71, 5.19.12 and others. CVE-2022-48634 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-48634?

CVE-2022-48634 has a CVSS score of 5.3 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Is there a patch available for CVE-2022-48634?

Yes. CVE-2022-48634 has been patched. Fixed versions include 5.10.146, 5.15.71, 5.19.12 and others. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-48634 actively exploited?

No. CVE-2022-48634 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.