CVE-2026-98492: Linux kernel · net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in bda487567d0b7b15dfa876511085c0666b9efad5 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 12:55 UTC
Rated Medium by Threat Radar's AI analysis · 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.
What to do
Upgrade Linux kernel to bda487567d0b7b15dfa876511085c0666b9efad5, 259e6cbb6a097da8ced544ee92a6fbde35aa1338, 23d42b9a3bcd55b17d3b371544fedc708c2397e9 or 6.18.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available in Linux kernel version 6.18 and later. Users and administrators should upgrade to version 6.18 or later to remediate this issue. No additional mitigation steps are indicated.
Description
A memory leak vulnerability was fixed in the Linux kernel's macb network driver. The issue involved dma_alloc_coherent() leaks on error paths in macb_alloc(), where allocated transmit and receive buffers were not properly freed under certain error conditions. This could lead to resource exhaustion if the error paths were triggered repeatedly.