Linux Kernel up to 6.15.6 AF_RXRPC Service rxrpc_alloc_incoming_call allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.15.6. It has been declared as problematic. This affects the function rxrpc_alloc_incoming_call of the component AF_RXRPC Service. Executing a manipulation can lead to allocation of resources. This vulnerability is registered as CVE-2025-38514. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.15.6. This vulnerability affects the function rxrpc_alloc_incoming_call of the component AF_RXRPC Service. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix oops due to non-existence of prealloc backlog struct If an AF_RXRPC service socket is opened and bound, but calls are preallocated, then rxrpc_alloc_incoming_call() will oops because the rxrpc_backlog struct doesn't get allocated until the first preallocation is made. Fix this by returning NULL from rxrpc_alloc_incoming_call() if there is no backlog struct. This will cause the incoming call to be aborted.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2025-38514 since 04/16/2025. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 265954 (Ubuntu 20.04 LTS : Linux kernel (Oracle) vulnerabilities (USN-7776-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.296, 5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39 or 6.15.7 eliminates this vulnerability. Applying the patch bf0ca6a1bc4fb904b598137c6718785a107e3adf/f7afb3ff01c42c49e8a143cdce400b95844bb506/f5e72b7824d08c206ce106d30cb37c4642900ccc/0eef29385d715d4c7fd707b18d4a9b76c76dd5e6/efc1b2b7c1a308b60df8f36bc2d7ce16d3999364/d1ff5f9d2c5405681457262e23c720b08977c11f/2c2e9ebeb036f9b1b09325ec5cfdfe0e78f357c3/880a88f318cf1d2a0f4c0a7ff7b07e2062b434a4 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 (265954), EUVD (EUVD-2025-25084) and CERT Bund (WID-SEC-2025-1858). 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
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Dell Avamar
  • Open Source Linux Kernel
  • Dell NetWorker
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM
  • IBM Security Verify Access

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / 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: 265954
Nessus Name: Ubuntu 20.04 LTS : Linux kernel (Oracle) vulnerabilities (USN-7776-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.296/5.10.240/5.15.189/6.1.146/6.6.99/6.12.39/6.15.7
Patch: bf0ca6a1bc4fb904b598137c6718785a107e3adf/f7afb3ff01c42c49e8a143cdce400b95844bb506/f5e72b7824d08c206ce106d30cb37c4642900ccc/0eef29385d715d4c7fd707b18d4a9b76c76dd5e6/efc1b2b7c1a308b60df8f36bc2d7ce16d3999364/d1ff5f9d2c5405681457262e23c720b08977c11f/2c2e9ebeb036f9b1b09325ec5cfdfe0e78f357c3/880a88f318cf1d2a0f4c0a7ff7b07e2062b434a4

Timelineinfo

04/16/2025 CVE reserved
08/16/2025 +122 days Advisory disclosed
08/16/2025 +0 days VulDB entry created
01/30/2026 +167 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38514 (🔒)
GCVE (CVE): GCVE-0-2025-38514
GCVE (VulDB): GCVE-100-320410
EUVD: 🔒
CERT Bund: WID-SEC-2025-1858 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 08/16/2025 18:06
Updated: 01/30/2026 18:08
Changes: 08/16/2025 18:06 (58), 08/16/2025 18:21 (1), 08/19/2025 09:25 (1), 09/27/2025 00:35 (2), 09/28/2025 07:48 (7), 10/02/2025 22:37 (1), 10/12/2025 16:40 (1), 11/01/2025 18:51 (1), 01/23/2026 03:19 (10), 01/30/2026 18:08 (1)
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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