Linux Kernel up to 5.15.9 RDMA rxe_qp_from_init use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 5.15.9. This vulnerability affects the function rxe_qp_from_init of the component RDMA. Executing a manipulation can lead to use after free. The identification of this vulnerability is CVE-2021-47616. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.15.9. This vulnerability affects the function rxe_qp_from_init of the component RDMA. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: RDMA: Fix use-after-free in rxe_queue_cleanup On error handling path in rxe_qp_from_init() qp->sq.queue is freed and then rxe_create_qp() will drop last reference to this object. qp clean up function will try to free this queue one time and it causes UAF bug. Fix it by zeroing queue pointer after freeing queue in rxe_qp_from_init().

The advisory is available at git.kernel.org. This vulnerability was named CVE-2021-47616 since 06/19/2024. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/04/2025).

Upgrading to version 5.15.10 eliminates this vulnerability. Applying the patch acb53e47db1f/84b01721e804 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 CERT Bund (WID-SEC-2024-1418). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • IBM InfoSphere Guardium
  • Oracle Linux
  • Oracle VM
  • IBM Security Guardium
  • RESF Rocky Linux
  • Broadcom Brocade SANnav
  • Dell NetWorker
  • Open Source Linux Kernel
  • IBM QRadar SIEM
  • Dell Avamar
  • IBM Storage Scale
  • Juniper Junos Space
  • SolarWinds Security Event Manager
  • Dell PowerProtect Data Domain

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.15.10
Patch: acb53e47db1f/84b01721e804

Timelineinfo

06/19/2024 🔍
06/19/2024 +0 days 🔍
06/19/2024 +0 days 🔍
10/04/2025 +472 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-47616 (🔍)
GCVE (CVE): GCVE-0-2021-47616
GCVE (VulDB): GCVE-100-269074
CERT Bund: WID-SEC-2024-1418 - Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Entryinfo

Created: 06/19/2024 17:55
Updated: 10/04/2025 13:09
Changes: 06/19/2024 17:55 (57), 08/28/2024 02:34 (13), 10/04/2025 13:09 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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