VulnerabilityPublished 31 Jan 2026Updated 19 Oct 2026

CVE-2025-71182: Linux kernel · Race Condition

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ebb0dfd718dd31c8d3600612ca4b7207ec3d923a : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS

0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-06-10.

Patch

Available – fixed in ebb0dfd718dd31c8d3600612ca4b7207ec3d923a, c3a4316e3c746af415c0fd6c6d489ad13f53714d, ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536 +4

Exploitation evidence

Disclosed: evidence found.
CVE published 31 Jan 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 or the CVSS exploit maturity 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 ≥ 9d71dd0c70099914fcd063135da3c580865e924c, < ebb0dfd718dd31c8d3600612ca4b7207ec3d923a	Fixed in ebb0dfd718dd31c8d3600612ca4b7207ec3d923a
LinuxLinux	Affected ≥ 9d71dd0c70099914fcd063135da3c580865e924c, < c3a4316e3c746af415c0fd6c6d489ad13f53714d	Fixed in c3a4316e3c746af415c0fd6c6d489ad13f53714d
LinuxLinux	Affected ≥ 9d71dd0c70099914fcd063135da3c580865e924c, < ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536	Fixed in ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536
LinuxLinux	Affected ≥ 9d71dd0c70099914fcd063135da3c580865e924c, < 79dd3f1d9dd310c2af89b09c71f34d93973b200f	Fixed in 79dd3f1d9dd310c2af89b09c71f34d93973b200f
LinuxLinux	Affected ≥ 9d71dd0c70099914fcd063135da3c580865e924c, < 78d87b72cebe2a993fd5b017e9f14fb6278f2eae	Fixed in 78d87b72cebe2a993fd5b017e9f14fb6278f2eae
LinuxLinux	Affected ≥ 9d71dd0c70099914fcd063135da3c580865e924c, < 46ca9dc978923c5e1247a9e9519240ba7ace413c	Fixed in 46ca9dc978923c5e1247a9e9519240ba7ace413c

Description

In the Linux kernel, the following vulnerability has been resolved: can: j1939: make j1939_session_activate() fail if device is no longer registered syzbot is still reporting unregister_netdevice: waiting for vcan0 to become free. Usage count = 2 even after commit 93a27b5891b8 ("can: j1939: add missing calls in NETDEV_UNREGISTER notification handler") was added. A debug printk() patch found that j1939_session_activate() can succeed even after j1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER) has completed. Since j1939_cancel_active_session() is processed with the session list lock held, checking ndev->reg_state in j1939_session_activate() with the session list lock held can reliably close the race window.

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

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Exploitation evidence

What to do

Affected software

Description

WeaknessesCWE-362

Technical details

References

Community reviews

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