Linux Kernel up to 6.1.1 raid1 md_unregister_thread null pointer dereference

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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.1.1 and classified as critical. This issue affects the function md_unregister_thread of the component raid1. Performing a manipulation results in null pointer dereference. This vulnerability is known as CVE-2022-50715. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.1.1. This affects the function md_unregister_thread of the component raid1. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: md/raid1: stop mdx_raid1 thread when raid1 array run failed fail run raid1 array when we assemble array with the inactive disk only, but the mdx_raid1 thread were not stop, Even if the associated resources have been released. it will caused a NULL dereference when we do poweroff. This causes the following Oops: [ 287.587787] BUG: kernel NULL pointer dereference, address: 0000000000000070 [ 287.594762] #PF: supervisor read access in kernel mode [ 287.599912] #PF: error_code(0x0000) - not-present page [ 287.605061] PGD 0 P4D 0 [ 287.607612] Oops: 0000 [#1] SMP NOPTI [ 287.611287] CPU: 3 PID: 5265 Comm: md0_raid1 Tainted: G U 5.10.146 #0 [ 287.619029] Hardware name: xxxxxxx/To be filled by O.E.M, BIOS 5.19 06/16/2022 [ 287.626775] RIP: 0010:md_check_recovery+0x57/0x500 [md_mod] [ 287.632357] Code: fe 01 00 00 48 83 bb 10 03 00 00 00 74 08 48 89 ...... [ 287.651118] RSP: 0018:ffffc90000433d78 EFLAGS: 00010202 [ 287.656347] RAX: 0000000000000000 RBX: ffff888105986800 RCX: 0000000000000000 [ 287.663491] RDX: ffffc90000433bb0 RSI: 00000000ffffefff RDI: ffff888105986800 [ 287.670634] RBP: ffffc90000433da0 R08: 0000000000000000 R09: c0000000ffffefff [ 287.677771] R10: 0000000000000001 R11: ffffc90000433ba8 R12: ffff888105986800 [ 287.684907] R13: 0000000000000000 R14: fffffffffffffe00 R15: ffff888100b6b500 [ 287.692052] FS: 0000000000000000(0000) GS:ffff888277f80000(0000) knlGS:0000000000000000 [ 287.700149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.705897] CR2: 0000000000000070 CR3: 000000000320a000 CR4: 0000000000350ee0 [ 287.713033] Call Trace: [ 287.715498] raid1d+0x6c/0xbbb [raid1] [ 287.719256] ? __schedule+0x1ff/0x760 [ 287.722930] ? schedule+0x3b/0xb0 [ 287.726260] ? schedule_timeout+0x1ed/0x290 [ 287.730456] ? __switch_to+0x11f/0x400 [ 287.734219] md_thread+0xe9/0x140 [md_mod] [ 287.738328] ? md_thread+0xe9/0x140 [md_mod] [ 287.742601] ? wait_woken+0x80/0x80 [ 287.746097] ? md_register_thread+0xe0/0xe0 [md_mod] [ 287.751064] kthread+0x11a/0x140 [ 287.754300] ? kthread_park+0x90/0x90 [ 287.757974] ret_from_fork+0x1f/0x30 In fact, when raid1 array run fail, we need to do md_unregister_thread() before raid1_free().

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2022-50715 since 12/24/2025. The exploitability is told to be difficult. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 279870 (Linux Distros Unpatched Vulnerability : CVE-2022-50715), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.86, 6.0.16 or 6.1.2 eliminates this vulnerability. Applying the patch d684ceb77311410aeaf5189d321f9f564838c49a/110f14a7b2eb5b8aa9df5af2d629524f2a07d543/0c7c7468c3ae222e297b7dc74d6ccb69c4d0183c/19d5a0e17aba92b10d895e40ec782768cf00da23/10d713532ffc67b13df61ed9c138a8ce0a186236/a3cc41e05e8af340a2a759b168c29fffdb9194eb/22be44212cad8be96860346882d8e694b0b437b6/d26364596db8f8b55277b2afb3952e05a4057a21/b611ad14006e5be2170d9e8e611bf49dff288911 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (279870) and CERT Bund (WID-SEC-2025-2929). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 279870
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2022-50715

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.9.337/4.14.303/4.19.270/5.4.229/5.10.163/5.15.86/6.0.16/6.1.2
Patch: d684ceb77311410aeaf5189d321f9f564838c49a/110f14a7b2eb5b8aa9df5af2d629524f2a07d543/0c7c7468c3ae222e297b7dc74d6ccb69c4d0183c/19d5a0e17aba92b10d895e40ec782768cf00da23/10d713532ffc67b13df61ed9c138a8ce0a186236/a3cc41e05e8af340a2a759b168c29fffdb9194eb/22be44212cad8be96860346882d8e694b0b437b6/d26364596db8f8b55277b2afb3952e05a4057a21/b611ad14006e5be2170d9e8e611bf49dff288911

Timelineinfo

12/24/2025 Advisory disclosed
12/24/2025 +0 days CVE reserved
12/24/2025 +0 days VulDB entry created
04/20/2026 +117 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-50715 (🔒)
GCVE (CVE): GCVE-0-2022-50715
GCVE (VulDB): GCVE-100-337935
CERT Bund: WID-SEC-2025-2929 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 12/24/2025 14:14
Updated: 04/20/2026 23:20
Changes: 12/24/2025 14:14 (59), 12/28/2025 05:07 (2), 12/29/2025 14:04 (7), 03/02/2026 23:15 (1), 04/20/2026 23:20 (1)
Complete: 🔍
Cache ID: 216::103

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