CVE-2026-31417 | Linux Kernel up to 6.1.167/6.6.133/6.12.80/6.18.21/6.19.11 x25_clear_queues buffer overflow
VulDBArchived Apr 13, 2026✓ Full text saved
A vulnerability was found in Linux Kernel up to 6.1.167/6.6.133/6.12.80/6.18.21/6.19.11 . It has been rated as critical . Affected is the function x25_clear_queues . Performing a manipulation results in buffer overflow. This vulnerability is reported as CVE-2026-31417 . The attacker must have access to the local network to execute the attack. No exploit exists. Upgrading the affected component is advised.
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✦ AI Summary· Claude Sonnet
VDB-357148 · CVE-2026-31417 · GCVE-0-2026-31417
LINUX KERNEL UP TO 6.1.167/6.6.133/6.12.80/6.18.21/6.19.11 X25_CLEAR_QUEUES BUFFER OVERFLOW
HISTORYDIFFRELATEJSONXMLCTI
CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score
7.6 $5k-$25k 3.94+
Summaryinfo
A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.1.167/6.6.133/6.12.80/6.18.21/6.19.11. Affected by this vulnerability is the function x25_clear_queues. Executing a manipulation can lead to buffer overflow. This vulnerability appears as CVE-2026-31417. There is no available exploit. It is advisable to upgrade the affected component.
Detailsinfo
A vulnerability classified as critical was found in Linux Kernel up to 6.1.167/6.6.133/6.12.80/6.18.21/6.19.11. This vulnerability affects the function x25_clear_queues. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:
In the Linux kernel, the following vulnerability has been resolved: net/x25: Fix overflow when accumulating packets Add a check to ensure that `x25_sock.fraglen` does not overflow. The `fraglen` also needs to be resetted when purging `fragment_queue` in `x25_clear_queues()`.
The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-31417 since 03/09/2026. The exploitation appears to be easy. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 04/13/2026).
Upgrading to version 6.1.168, 6.6.134, 6.12.81, 6.18.22 or 6.19.12 eliminates this vulnerability. Applying the patch 6e568835ea54a3e1d08e310e34f95d434e739477/1734bd85c5e0a7a801295b729efb56b009cb8fc3/4e2d1bcef78d21247fe8fef13bc7ed95885df2b5/8c92969c197b91c134be27dc3afb64ab468853a9/f953f11ccf4afe6feb635c08145f4240d9a6b544/a1822cb524e89b4cd2cf0b82e484a2335496a6d9 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.
Productinfo
Type
Operating System
Vendor
Linux
Name
Kernel
Version
6.1.167
6.6.133
6.12.0
6.12.1
6.12.2
6.12.3
6.12.4
6.12.5
6.12.6
6.12.7
6.12.8
6.12.9
6.12.10
6.12.11
6.12.12
6.12.13
6.12.14
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6.12.17
6.12.18
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6.12.74
6.12.75
6.12.76
6.12.77
6.12.78
6.12.79
6.12.80
6.18.0
6.18.1
6.18.2
6.18.3
6.18.4
6.18.5
6.18.6
6.18.7
6.18.8
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6.18.18
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6.18.20
6.18.21
6.19.0
6.19.1
6.19.2
6.19.3
6.19.4
6.19.5
6.19.6
6.19.7
6.19.8
6.19.9
6.19.10
6.19.11
License
open-source
Website
Vendor: https://www.kernel.org/
CPE 2.3info
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CPE 2.2info
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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
Vector Complexity Authentication Confidentiality Integrity Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploitinginfo
Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Partially
Availability: 🔒
Status: Not defined
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 6.1.168/6.6.134/6.12.81/6.18.22/6.19.12
Patch: 6e568835ea54a3e1d08e310e34f95d434e739477/1734bd85c5e0a7a801295b729efb56b009cb8fc3/4e2d1bcef78d21247fe8fef13bc7ed95885df2b5/8c92969c197b91c134be27dc3afb64ab468853a9/f953f11ccf4afe6feb635c08145f4240d9a6b544/a1822cb524e89b4cd2cf0b82e484a2335496a6d9
Timelineinfo
03/09/2026 CVE reserved
04/13/2026 +34 days Advisory disclosed
04/13/2026 +0 days VulDB entry created
04/13/2026 +0 days VulDB entry last update
Sourcesinfo
Vendor: kernel.org
Advisory: git.kernel.org
Status: Confirmed
CVE: CVE-2026-31417 (🔒)
GCVE (CVE): GCVE-0-2026-31417
GCVE (VulDB): GCVE-100-357148
Entryinfo
Created: 04/13/2026 16:03
Changes: 04/13/2026 16:03 (58)
Complete: 🔍
Cache ID: 99:8C5:101
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