Which versions of Linux are affected by CVE-2026-98544?

In the Linux kernel, the following vulnerability has been resolved: bna: prevent IOC timer rearm during teardown bna: prevent IOC timer rearm during teardown bnad_pci_remove() and the probe…. A patch is available.

Is there a patch available for CVE-2026-98544?

Yes, a patch is available for CVE-2026-98544. Update the affected software to the latest version immediately.

Linux CVE-2026-98544

EUVD-2026-103589

2026-10-18 Linux

GHSA-crgf-pp48-gvh7

Information Disclosure Linux

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Monitor Track and reassess. Why: No CVSS yet + weak signal (CWE or non-zero EPSS).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisCVE.org

In the Linux kernel, the following vulnerability has been resolved:

bna: prevent IOC timer rearm during teardown

bnad_pci_remove() and the probe disable_ioceth path call timer_delete_sync() for ioc_timer, sem_timer and hb_timer, but not for iocpf_timer. bnad_iocpf_timeout() then takes bnad->bna_lock after free_netdev() has freed the struct bnad.

Deleting iocpf_timer last does not fix this. sem_timer and iocpf_timer rearm each other: bnad_iocpf_sem_timeout() can arm iocpf_timer, and bnad_iocpf_timeout() arms sem_timer from bfa_ioc_hw_sem_get() when the semaphore is busy. timer_delete_sync() only waits out its own callback. bnad_ioceth_disable() can time out and leave that callback live.

Shut all four IOC timers down with timer_shutdown_sync() on both paths, so a later mod_timer() is ignored.

This issue was identified during our ongoing static-analysis research while reviewing kernel code.

Affected VersionsENISA

Linux patch: 7.3-rc5

Linux 1d32f7696286eef9e5644eb57e79a36756274357 <e09d1c6729ee4a7812128902d9274ff565f958b8

Linux 1d32f7696286eef9e5644eb57e79a36756274357 <28e32ace754b57534ef0ca0fb99bcbea5b13ba2a

Linux 2.6.38

Linux patch: 6.18.55

Linux patch: 6.12.112

Linux 1d32f7696286eef9e5644eb57e79a36756274357 <77b1718e39e5c9f6956fb60807326af20baf889d

Linux patch: 0

Linux 1d32f7696286eef9e5644eb57e79a36756274357 <4d97a141e85a034566c33c7ed854c8a3e8a268f1

Linux patch: 7.2.9

Affected Packages

euvd linux no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Lifecycle Timeline

Patch available

Oct 18, 2026 - 16:02 EUVD

CVE Published

Oct 18, 2026 - 15:18 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 91% exploitable

Data Quality

3 sources

Confidence: Low

EUVD

CVE.org

EPSS MSRC

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity Not scored yet

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

No CVSS yet + weak signal (CWE or non-zero EPSS)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.