Linux Kernel up to 6.17.10 libceph handle_auth_session_key len out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.15.196/6.1.158/6.6.118/6.12.60/6.17.10. It has been rated as critical. Impacted is the function handle_auth_session_key of the component libceph. This manipulation of the argument len causes out-of-bounds write. This vulnerability is tracked as CVE-2025-68284. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 5.15.196/6.1.158/6.6.118/6.12.60/6.17.10 and classified as critical. Affected by this vulnerability is the function handle_auth_session_key of the component libceph. The manipulation of the argument len with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: libceph: prevent potential out-of-bounds writes in handle_auth_session_key() The len field originates from untrusted network packets. Boundary checks have been added to prevent potential out-of-bounds writes when decrypting the connection secret or processing service tickets. [ idryomov: changelog ]

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2025-68284 since 12/16/2025. The exploitation appears to be easy. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/22/2026).

The vulnerability scanner Nessus provides a plugin with the ID 282382 (Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1350)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.197, 6.1.159, 6.6.119, 6.12.61 or 6.17.11 eliminates this vulnerability. Applying the patch f22c55a20a2d9ffbbac57408d5d488cef8201e9d/8dfcc56af28cffb8f25fb9be37b3acc61f2a3d09/ccbccfba25e9aa395daaea156b5e7790910054c4/5ef575834ca99f719d7573cdece9df2fe2b72424/6920ff09bf911bc919cd7a6b7176fbdd1a6e6850/7fce830ecd0a0256590ee37eb65a39cbad3d64fc 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 (282382) and CERT Bund (WID-SEC-2025-2868). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • 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: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
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: Out-of-bounds write
CWE: CWE-787 / CWE-119
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: 282382
Nessus Name: Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1350)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.197/6.1.159/6.6.119/6.12.61/6.17.11
Patch: f22c55a20a2d9ffbbac57408d5d488cef8201e9d/8dfcc56af28cffb8f25fb9be37b3acc61f2a3d09/ccbccfba25e9aa395daaea156b5e7790910054c4/5ef575834ca99f719d7573cdece9df2fe2b72424/6920ff09bf911bc919cd7a6b7176fbdd1a6e6850/7fce830ecd0a0256590ee37eb65a39cbad3d64fc

Timelineinfo

12/16/2025 Advisory disclosed
12/16/2025 +0 days CVE reserved
12/16/2025 +0 days VulDB entry created
02/22/2026 +68 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-68284 (🔒)
GCVE (CVE): GCVE-0-2025-68284
GCVE (VulDB): GCVE-100-336847
CERT Bund: WID-SEC-2025-2868 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 12/16/2025 17:48
Updated: 02/22/2026 06:28
Changes: 12/16/2025 17:48 (60), 01/09/2026 14:22 (2), 01/20/2026 06:22 (7), 02/04/2026 06:54 (1), 02/22/2026 06:28 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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