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CVE-2026-99245

KEYS: Fix key_reject_and_link() race with keyring restriction

CVSS score

—

EPSS probability

—

Risk score

—

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Linux Kernel Keyring Restriction Race Condition Vulnerability

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

A race condition exists in the Linux kernel KEYS subsystem between key_reject_and_link() and keyring restriction.

Why does it matter?

This vulnerability can lead to synchronization issues and unexpected behaviors during concurrent operations within the keyring mechanism.

What should be done?

  • Follow vendor advisories and updates
Chain of evidence and sources2 verified claims

key_reject_and_link() içindeki restrict_link kontrolü semafor alınmadan önce yapılmaktadır.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

Sorun, eş zamanlı bir keyring_restrict() çağrısı ile yarış durumuna neden olmaktadır.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd
Show the technical text from the sources

In the Linux kernel, the following vulnerability has been resolved: KEYS: Fix key_reject_and_link() race with keyring restriction The restrict_link check in key_reject_and_link() is done before taking the keyring semaphore, racing with a concurrent keyring_restrict() that installs the restriction while holding the semaphore in write mode. Move the check to after __key_link_lock(), so it is done under the semaphore, matching the pattern used in __key_create_or_update().

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-99245 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1linuxLinux View
2linuxLinux View
Total affected vendors: 1|Products: 2

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
The sources have not yet published a verified CVSS metric.

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-99245 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CWE-20: Improper Input Validation

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-99245 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Official Sources and Advisories

https://git.kernel.org/stable/c/c7956ec99ad0e173720d95de9fa788bb077809f2vendor-advisoryhttps://git.kernel.org/stable/c/2c3d907dd15f4e30d4c35b9f7a7a5078de6a1b1fvendor-advisoryhttps://git.kernel.org/stable/c/72f367417a6aee56821d0b0114cfd2b080008b63vendor-advisoryhttps://git.kernel.org/stable/c/19dfc37c9deefa69dc805d01d35d1f2fd7902e33vendor-advisoryhttps://git.kernel.org/stable/c/5787887eba0f0979a8c86d03a8e891395d5c24advendor-advisoryhttps://git.kernel.org/stable/c/01835d3a3709be508ae5209f806640336c48e395vendor-advisoryhttps://git.kernel.org/stable/c/6fc0c818b1cac66003e937c8a0d3bfb23fd3f130vendor-advisoryhttps://git.kernel.org/stable/c/23a9163cc40b4996ba1e20533b1210a1a0bee416vendor-advisory

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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CVE-2026-99245 · KEYS: Fix key_reject_and_link() race with…