Linux Kernel up to 6.0.9 io_uring memory leak

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.0.9. Impacted is an unknown function of the component io_uring. Performing a manipulation results in an unknown weakness. This vulnerability was named CVE-2022-49791. There is no available exploit. It is advisable to upgrade the affected component. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.0.9. This affects an unknown functionality of the component io_uring. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: io_uring: fix multishot accept request leaks Having REQ_F_POLLED set doesn't guarantee that the request is executed as a multishot from the polling path. Fortunately for us, if the code thinks it's multishot issue when it's not, it can only ask to skip completion so leaking the request. Use issue_flags to mark multipoll issues.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2022-49791 since 05/01/2025. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 246666 (Linux Distros Unpatched Vulnerability : CVE-2022-49791), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.0.10 eliminates this vulnerability. Applying the patch 0e4626de856ef8f25ecd9c716e76d4f95ce95639/91482864768a874c4290ef93b84a78f4f1dac51b 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 (246666) and EUVD (EUVD-2025-12991). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 246666
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2022-49791

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.0.10
Patch: 0e4626de856ef8f25ecd9c716e76d4f95ce95639/91482864768a874c4290ef93b84a78f4f1dac51b

Timelineinfo

05/01/2025 Advisory disclosed
05/01/2025 +0 days CVE reserved
05/01/2025 +0 days VulDB entry created
11/07/2025 +190 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-49791 (🔒)
GCVE (CVE): GCVE-0-2022-49791
GCVE (VulDB): GCVE-100-306993
EUVD: 🔒

Entryinfo

Created: 05/01/2025 05:36 PM
Updated: 11/07/2025 01:14 PM
Changes: 05/01/2025 05:36 PM (56), 08/09/2025 05:16 PM (2), 11/05/2025 11:32 PM (1), 11/07/2025 01:14 PM (14)
Complete: 🔍
Cache ID: 244:D0C:40

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