Linux Kernel io_uring double free

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k1.91

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel. This impacts the function io_uring. The manipulation leads to double free. This vulnerability is uniquely identified as CVE-2022-2327. The attack is possible to be carried out remotely. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Linux Kernel (Operating System) (version now known) and classified as critical. This issue affects the function io_uring. The manipulation with an unknown input leads to a double free vulnerability. Using CWE to declare the problem leads to CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

io_uring use work_flags to determine which identity need to grab from the calling process to make sure it is consistent with the calling process when executing IORING_OP. Some operations are missing some types, which can lead to incorrect reference counts which can then lead to a double free. We recommend upgrading the kernel past commit df3f3bb5059d20ef094d6b2f0256c4bf4127a859

The weakness was disclosed 07/22/2022. The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2022-2327 since 07/06/2022. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 239850 (TencentOS Server 4: kernel (TSSA-2024:0980)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the databases at Tenable (239850) and EUVD (EUVD-2022-34596). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (Google Inc.): 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 239850
Nessus Name: TencentOS Server 4: kernel (TSSA-2024:0980)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

07/06/2022 🔍
07/22/2022 +16 days 🔍
07/22/2022 +0 days 🔍
05/25/2026 +1403 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2022-2327 (🔍)
GCVE (CVE): GCVE-0-2022-2327
GCVE (VulDB): GCVE-100-204917
EUVD: 🔍

Entryinfo

Created: 07/22/2022 14:35
Updated: 05/25/2026 14:56
Changes: 07/22/2022 14:35 (41), 08/20/2022 12:20 (21), 06/19/2025 19:41 (16), 05/25/2026 14:56 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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