Linux Kernel up to 5.15.11 qib qib_user_sdma_queue_pkts memory leak

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.15.11. Affected is the function qib_user_sdma_queue_pkts of the component qib. The manipulation leads to memory leak. This vulnerability is listed as CVE-2021-47104. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.15.11 (Operating System). This issue affects the function qib_user_sdma_queue_pkts of the component qib. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: IB/qib: Fix memory leak in qib_user_sdma_queue_pkts() The wrong goto label was used for the error case and missed cleanup of the pkt allocation. Addresses-Coverity-ID: 1493352 ("Resource leak")

The weakness was presented 03/04/2024. It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2021-47104. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 246857 (Linux Distros Unpatched Vulnerability : CVE-2021-47104), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.4.297, 4.9.295, 4.14.260, 4.19.223, 5.4.169, 5.10.89, 5.15.12 or 5.16 eliminates this vulnerability. Applying the patch 1ced0a3015a9/76b648063eb3/d53456492b5d/0aaec9c5f607/79dcbd817615/7cf6466e00a7/aefcc25f3a0c/bee90911e013 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 vulnerability database at Tenable (246857). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.4.296
• 4.9.294
• 4.14.259
• 4.19.222
• 5.4.168
• 5.10.0
• 5.10.1
• 5.10.2
• 5.10.3
• 5.10.4
• 5.10.5
• 5.10.6
• 5.10.7
• 5.10.8
• 5.10.9
• 5.10.10
• 5.10.11
• 5.10.12
• 5.10.13
• 5.10.14
• 5.10.15
• 5.10.16
• 5.10.17
• 5.10.18
• 5.10.19
• 5.10.20
• 5.10.21
• 5.10.22
• 5.10.23
• 5.10.24
• 5.10.25
• 5.10.26
• 5.10.27
• 5.10.28
• 5.10.29
• 5.10.30
• 5.10.31
• 5.10.32
• 5.10.33
• 5.10.34
• 5.10.35
• 5.10.36
• 5.10.37
• 5.10.38
• 5.10.39
• 5.10.40
• 5.10.41
• 5.10.42
• 5.10.43
• 5.10.44
• 5.10.45
• 5.10.46
• 5.10.47
• 5.10.48
• 5.10.49
• 5.10.50
• 5.10.51
• 5.10.52
• 5.10.53
• 5.10.54
• 5.10.55
• 5.10.56
• 5.10.57
• 5.10.58
• 5.10.59
• 5.10.60
• 5.10.61
• 5.10.62
• 5.10.63
• 5.10.64
• 5.10.65
• 5.10.66
• 5.10.67
• 5.10.68
• 5.10.69
• 5.10.70
• 5.10.71
• 5.10.72
• 5.10.73
• 5.10.74
• 5.10.75
• 5.10.76
• 5.10.77
• 5.10.78
• 5.10.79
• 5.10.80
• 5.10.81
• 5.10.82
• 5.10.83
• 5.10.84
• 5.10.85
• 5.10.86
• 5.10.87
• 5.10.88
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11

License

• open-source

Website

• Vendor: https://www.kernel.org/

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