VulnerabilityPublished 18 Oct 2026

CVE-2026-98492: Linux kernel · net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths

Source GCVE Database

Authoritative record:CVE-2026-98492· Medium

Not known to be exploited · fixed in bda487567d0b7b15dfa876511085c0666b9efad5 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in bda487567d0b7b15dfa876511085c0666b9efad5, 259e6cbb6a097da8ced544ee92a6fbde35aa1338, 23d42b9a3bcd55b17d3b371544fedc708c2397e9 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 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.

ghsa-pvj4-6qwf-8pwq

What to do

Upgrade Linux kernel to bda487567d0b7b15dfa876511085c0666b9efad5, 259e6cbb6a097da8ced544ee92a6fbde35aa1338, 23d42b9a3bcd55b17d3b371544fedc708c2397e9 or 6.18.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=6.17.3 <6.18	Fixed in bda487567d0b7b15dfa876511085c0666b9efad5 259e6cbb6a097da8ced544ee92a6fbde35aa1338 23d42b9a3bcd55b17d3b371544fedc708c2397e9 6.18
LinuxLinux	Affected =6.18	Fixed in–

AI-suggested

A fix has been implemented to address the memory leaks by correcting buffer management in the macb driver. Users should apply the official Linux kernel updates that include this patch once available. Patch status is not explicitly confirmed in the provided data; check the vendor advisory or Linux kernel mailing lists for the official fix and update guidance.

Description

A vulnerability in the Linux kernel's macb network driver was resolved by fixing memory leaks related to dma_alloc_coherent() during error handling in macb_alloc(). The issue involved leaking transmit (Tx) and receive (Rx) buffers when allocations failed or crossed a 4GB boundary. The fix ensures allocated buffers are properly stored and freed during error cleanup.

References

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