Linux Kernel up to 7.0.0 privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 7.0.0. Affected by this issue is some unknown functionality. Executing a manipulation can lead to an unknown weakness. The identification of this vulnerability is CVE-2026-31628. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.0.0. It has been declared as critical. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: x86/CPU: Fix FPDSS on Zen1 Zen1's hardware divider can leave, under certain circumstances, partial results from previous operations. Those results can be leaked by another, attacker thread. Fix that with a chicken bit.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-31628 since 03/09/2026. The exploitation appears to be difficult. 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 07/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 314332 (Oracle Linux 8 / 9 : Unbreakable Enterprise kernel (ELSA-2026-50261)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.253, 5.15.203, 6.1.169, 6.6.135, 6.12.82, 6.18.23, 6.19.13 or 7.0.1 eliminates this vulnerability. Applying the patch ed7a3a246309ccc807238f1b4f159ee6d37ff9c4/0548529af20e68c6552817834b766646dd3bd7a7/1272cfedf4cd1019ddf583917a99b62f2d3645bb/91f02726b2203b71545713ecb7fb006e60a2d66f/b731aca06387b195058a9f6449a03b62efa1bd10/ad17f07e95e6e8505e2153e5b391f0d27eacce25/e6af5286efe5a56128b34032572c9ce9ebeccda3/546785c719418c6166834a47e372a88f5f7ae893 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 (314332), EUVD (EUVD-2026-25521) and CERT Bund (WID-SEC-2026-1279). Once again VulDB remains the best source for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Red Hat Enterprise Linux
  • Oracle Linux
  • Open Source Linux Kernel

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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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: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 314332
Nessus Name: Oracle Linux 8 / 9 : Unbreakable Enterprise kernel (ELSA-2026-50261)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.253/5.15.203/6.1.169/6.6.135/6.12.82/6.18.23/6.19.13/7.0.1
Patch: ed7a3a246309ccc807238f1b4f159ee6d37ff9c4/0548529af20e68c6552817834b766646dd3bd7a7/1272cfedf4cd1019ddf583917a99b62f2d3645bb/91f02726b2203b71545713ecb7fb006e60a2d66f/b731aca06387b195058a9f6449a03b62efa1bd10/ad17f07e95e6e8505e2153e5b391f0d27eacce25/e6af5286efe5a56128b34032572c9ce9ebeccda3/546785c719418c6166834a47e372a88f5f7ae893

Timelineinfo

03/09/2026 CVE reserved
04/24/2026 +45 days Advisory disclosed
04/24/2026 +0 days VulDB entry created
07/17/2026 +84 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31628 (🔒)
GCVE (CVE): GCVE-0-2026-31628
GCVE (VulDB): GCVE-100-359404
EUVD: 🔒
CERT Bund: WID-SEC-2026-1279 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/24/2026 17:57
Updated: 07/17/2026 10:03
Changes: 04/24/2026 17:57 (56), 04/26/2026 01:01 (1), 05/13/2026 22:01 (2), 05/26/2026 10:03 (7), 07/17/2026 10:03 (11)
Complete: 🔍
Cache ID: 216::103

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