Linux Kernel up to 6.12.62/6.17.12/6.18.1 bpf_obj_free_fields privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 6.12.62/6.17.12/6.18.1. This affects the function bpf_obj_free_fields. Executing a manipulation can lead to an unknown weakness. This vulnerability is tracked as CVE-2025-68744. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.12.62/6.17.12/6.18.1 and classified as critical. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: bpf: Free special fields when update [lru_,]percpu_hash maps As [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing calls to 'bpf_obj_free_fields()' in 'pcpu_copy_value()' could cause the memory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the map gets freed. Fix this by calling 'bpf_obj_free_fields()' after 'copy_map_value[,_long]()' in 'pcpu_copy_value()'.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2025-68744 since 12/24/2025. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/12/2026).

The vulnerability scanner Nessus provides a plugin with the ID 279753 (Linux Distros Unpatched Vulnerability : CVE-2025-68744), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.63, 6.17.13, 6.18.2 or 6.19-rc1 eliminates this vulnerability. Applying the patch 3bf1378747e251571e0de15e7e0a6bf2919044e7/96a5cb7072cabbac5c66ac9318242c3bdceebb68/4a03d69cece145e4fb527464be29c3806aa3221e/6af6e49a76c9af7d42eb923703e7648cb2bf401a 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 (279753), EUVD (EUVD-2025-205218) and CERT Bund (WID-SEC-2025-2929). Once again VulDB remains the best source for vulnerability data.

Affected

  • Open Source Linux Kernel

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: 5.3

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

CVSSv2info

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

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 279753
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-68744

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.63/6.17.13/6.18.2/6.19-rc1
Patch: 3bf1378747e251571e0de15e7e0a6bf2919044e7/96a5cb7072cabbac5c66ac9318242c3bdceebb68/4a03d69cece145e4fb527464be29c3806aa3221e/6af6e49a76c9af7d42eb923703e7648cb2bf401a

Timelineinfo

12/24/2025 Advisory disclosed
12/24/2025 +0 days CVE reserved
12/24/2025 +0 days VulDB entry created
01/12/2026 +19 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-68744 (🔒)
GCVE (CVE): GCVE-0-2025-68744
GCVE (VulDB): GCVE-100-337972
EUVD: 🔒
CERT Bund: WID-SEC-2025-2929 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 12/24/2025 14:26
Updated: 01/12/2026 03:54
Changes: 12/24/2025 14:26 (57), 12/29/2025 07:31 (2), 01/03/2026 10:33 (7), 01/12/2026 03:54 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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