CVE-2026-64600VulnerabilityPublished 14 Jul 2026Updated 29 Sep 2026

Red Hat Bug Fix Advisory: kernel bug fix and enhancement update

Affects Red HatSource GCVE Database

Authoritative record:CVE-2026-64600· High 7.8

Not known to be exploited · CVSS 7.8 High · fixed in Red Hat package updates : patch Red Hat soon.

Data as of 26 Oct 2026, 09:16 UTC

CVSS 3.1 base score

7.8High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e705d81a7193dd19e69b8e2bad4696d78a4ea075, dc11be133efca5fe3a2fb02b016dee825cc12f18, b8c9aa832b52680ee40d6cab0efb081f9a69df05 +4

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5, < dc11be133efca5fe3a2fb02b016dee825cc12f18 ≥ 3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5, < b8c9aa832b52680ee40d6cab0efb081f9a69df05 ≥ 3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5, < 50f0012da1040f69a4e788cd9aed587c9a04983f ≥ 3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5, < e705d81a7193dd19e69b8e2bad4696d78a4ea075 ≥ 3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5, < 206c09b04dc5469c7ff14d8aceff2d47c88078d9 ≥ 3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5, < 44f891bc088958399eec27f7604928694aa35581 ≥ 3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5, < 2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7	Fixed in e705d81a7193dd19e69b8e2bad4696d78a4ea075 dc11be133efca5fe3a2fb02b016dee825cc12f18 b8c9aa832b52680ee40d6cab0efb081f9a69df05 206c09b04dc5469c7ff14d8aceff2d47c88078d9 50f0012da1040f69a4e788cd9aed587c9a04983f 44f891bc088958399eec27f7604928694aa35581 2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7
LinuxLinux	Affected =4.11	Fixed in–

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system. Bug Fix(es) and Enhancement(s): * XFS data corruption using reflink [rhel-9.8.z] (JIRA:RHEL-193937)

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (opens in a new tab)
Class weaknessLikelihood of exploit: MediumOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
Architecture and Design
In languages that support it, use synchronization primitives. Only wrap these around critical code to minimize the impact on performance.
Architecture and Design
Use thread-safe capabilities such as the data access abstraction in Spring.
Architecture and Design
Minimize the usage of shared resources in order to remove as much complexity as possible from the control flow and to reduce the likelihood of unexpected conditions occurring.
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
Secure Design Principles (opens in a new tab)
OWASP ASVS 4.0.3
V1.11.2 (opens in a new tab)
Attack patterns
Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions (opens in a new tab)
Leveraging Race Conditions (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

WeaknessesCWE-362

Technical details

References

Community reviews

Related threats