VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98486: Linux kernel · net: ena: fix MMIO read buffer leak on probe failure

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in a0f5fd7a285f44fa402242f26feddfe1d4a0fc6c : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:30 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% 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 a0f5fd7a285f44fa402242f26feddfe1d4a0fc6c, 47785f9f638b064ce6e32e8e3b6f1ffd83849fc2, 9476b4468862927297c94c440863cd8ed1e7cc83 +2

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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 1738cd3ed342294360d6a74d4e58800004bff854, < a0f5fd7a285f44fa402242f26feddfe1d4a0fc6c	Fixed in a0f5fd7a285f44fa402242f26feddfe1d4a0fc6c
LinuxLinux	Affected ≥ 1738cd3ed342294360d6a74d4e58800004bff854, < 47785f9f638b064ce6e32e8e3b6f1ffd83849fc2	Fixed in 47785f9f638b064ce6e32e8e3b6f1ffd83849fc2
LinuxLinux	Affected ≥ 1738cd3ed342294360d6a74d4e58800004bff854, < 9476b4468862927297c94c440863cd8ed1e7cc83	Fixed in 9476b4468862927297c94c440863cd8ed1e7cc83
LinuxLinux	Affected ≥ 1738cd3ed342294360d6a74d4e58800004bff854, < 30ff01b4c7e419bb70f40f01dcd7f6af680808b3	Fixed in 30ff01b4c7e419bb70f40f01dcd7f6af680808b3
LinuxLinux	Affected ≥ 1738cd3ed342294360d6a74d4e58800004bff854, < 7bd3e9a2d0c288e54f51df260d9433163f5fbc1e	Fixed in 7bd3e9a2d0c288e54f51df260d9433163f5fbc1e
LinuxLinux	Affected =4.9	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: net: ena: fix MMIO read buffer leak on probe failure ena_device_init() initializes the MMIO read mechanism with ena_com_mmio_reg_read_request_init(), which allocates a coherent DMA buffer for MMIO read responses. The normal removal path releases this buffer through ena_com_mmio_reg_read_request_destroy(). However, if ena_probe() fails after ena_device_init() succeeds, the error path destroys the admin resources and eventually frees ena_dev without destroying the MMIO read request, leaving the coherent DMA buffer allocated. Call ena_com_mmio_reg_read_request_destroy() in the probe error path before releasing the remaining device resources. This issue was found by manual code inspection.

References

Community reviews

Loading reviews…