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CVE.org (no NVD analysis yet)· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 0d31edc7ff1f7f265c11248819dfaf5a8274b209, 30ff01b4c7e419bb70f40f01dcd7f6af680808b3, 47785f9f638b064ce6e32e8e3b6f1ffd83849fc2; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0d31edc7ff1f7f265c11248819dfaf5a8274b209, 30ff01b4c7e419bb70f40f01dcd7f6af680808b3, 47785f9f638b064ce6e32e8e3b6f1ffd83849fc2; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 30, 2026
EPSS
0.2% · 9th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.9affected
    • 1738cd3ed342294360d6a74d4e58800004bff854 and later · before 9de940a3c5731be5a544f6f366576cc4dc073f7caffected · git
    • 1738cd3ed342294360d6a74d4e58800004bff854 and later · before 4b90112826439149dcee20e73d02f25ae0e2a9fbaffected · git
    • 1738cd3ed342294360d6a74d4e58800004bff854 and later · before 0d31edc7ff1f7f265c11248819dfaf5a8274b209affected · git
    • 1738cd3ed342294360d6a74d4e58800004bff854 and later · before a0f5fd7a285f44fa402242f26feddfe1d4a0fc6caffected · git
    • 1738cd3ed342294360d6a74d4e58800004bff854 and later · before 7bd3e9a2d0c288e54f51df260d9433163f5fbc1eaffected · git
    • 1738cd3ed342294360d6a74d4e58800004bff854 and later · before 30ff01b4c7e419bb70f40f01dcd7f6af680808b3affected · git
    • 1738cd3ed342294360d6a74d4e58800004bff854 and later · before 47785f9f638b064ce6e32e8e3b6f1ffd83849fc2affected · git
    • 1738cd3ed342294360d6a74d4e58800004bff854 and later · before 9476b4468862927297c94c440863cd8ed1e7cc83affected · git
    • before 4.9not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.9-17.2.9-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98484Oct 18, 2026 · netfilter: nf_tables: skip expired catchall elements on insert and delete
    0Monitor
  • ← EarlierCVE-2026-98485Oct 18, 2026 · netfilter: ip6t_rt: fix zero-address non-strict match out-of-bounds read
    28Monitor
  • Later →CVE-2026-98487Oct 18, 2026 · net: bridge: mdb: restart port group walk after deletion
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0d31edc7ff1f7f265c11248819dfaf5a8274b209Vendor (CNA)
Linux Linux30ff01b4c7e419bb70f40f01dcd7f6af680808b3Vendor (CNA)
Linux Linux47785f9f638b064ce6e32e8e3b6f1ffd83849fc2Vendor (CNA)
Linux Linux4b90112826439149dcee20e73d02f25ae0e2a9fbVendor (CNA)
Linux Linux7bd3e9a2d0c288e54f51df260d9433163f5fbc1eVendor (CNA)
Linux Linux9476b4468862927297c94c440863cd8ed1e7cc83Vendor (CNA)
Linux Linux9de940a3c5731be5a544f6f366576cc4dc073f7cVendor (CNA)
Linux Linuxa0f5fd7a285f44fa402242f26feddfe1d4a0fc6cVendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayOct 31, 2026+13 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records