Linux Kernel up to 6.15-rc3 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 6.15-rc3. Affected by this vulnerability is an unknown functionality. Executing a manipulation can lead to use after free. This vulnerability is handled as CVE-2025-37885. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.15-rc3. It has been declared as critical. This vulnerability affects an unknown functionality. 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: KVM: x86: Reset IRTE to host control if *new* route isn't postable Restore an IRTE back to host control (remapped or posted MSI mode) if the *new* GSI route prevents posting the IRQ directly to a vCPU, regardless of the GSI routing type. Updating the IRTE if and only if the new GSI is an MSI results in KVM leaving an IRTE posting to a vCPU. The dangling IRTE can result in interrupts being incorrectly delivered to the guest, and in the worst case scenario can result in use-after-free, e.g. if the VM is torn down, but the underlying host IRQ isn't freed.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2025-37885 since 04/16/2025. The exploitation appears to be easy. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/31/2026).

The vulnerability scanner Nessus provides a plugin with the ID 237255 (Debian dla-4178 : ata-modules-5.10.0-34-armmp-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.237, 5.15.181, 6.1.136, 6.6.89, 6.12.26, 6.14.5 or 6.15-rc4 eliminates this vulnerability. Applying the patch e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769/116c7d35b8f72eac383b9fd371d7c1a8ffc2968b/3481fd96d801715942b6f69fe251133128156f30/b5de7ac74f69603ad803c524b840bffd36368fc3/3066ec21d1a33896125747f68638725f456308db/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2 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 (237255) and CERT Bund (WID-SEC-2025-0991). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Dell Avamar
  • Open Source Linux Kernel
  • Dell NetWorker
  • Dell Secure Connect Gateway

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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Nessus ID: 237255
Nessus Name: Debian dla-4178 : ata-modules-5.10.0-34-armmp-di - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.10.237/5.15.181/6.1.136/6.6.89/6.12.26/6.14.5/6.15-rc4
Patch: e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769/116c7d35b8f72eac383b9fd371d7c1a8ffc2968b/3481fd96d801715942b6f69fe251133128156f30/b5de7ac74f69603ad803c524b840bffd36368fc3/3066ec21d1a33896125747f68638725f456308db/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2

Timelineinfo

04/16/2025 🔍
05/09/2025 +23 days 🔍
05/09/2025 +0 days 🔍
01/31/2026 +267 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-37885 (🔍)
GCVE (CVE): GCVE-0-2025-37885
GCVE (VulDB): GCVE-100-308176
CERT Bund: WID-SEC-2025-0991 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 05/09/2025 09:13
Updated: 01/31/2026 04:01
Changes: 05/09/2025 09:13 (57), 05/27/2025 07:04 (2), 11/13/2025 03:34 (12), 01/31/2026 04:01 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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