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

CVE-2026-98726: nvme-multipath: fix underflow in ANA log bounds checks

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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 03a0c21f0fd7a872953aae5714303d8f38d1e567, 08ab1e2dddf26248d5e6246046096b281cf5a319, 3045128294d347fd38542ad6e174b1b34d9c0751; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 03a0c21f0fd7a872953aae5714303d8f38d1e567, 08ab1e2dddf26248d5e6246046096b281cf5a319, 3045128294d347fd38542ad6e174b1b34d9c0751; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 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: nvme-multipath: fix underflow in ANA log bounds checks The number of ANA groups advertised through Identify Controller sizes the ANA log buffer. The ANA log header and group descriptors independently supply the number of groups and namespace IDs to parse. Both bounds checks subtract an untrusted object size from ana_log_size before comparing the current offset. If the object is larger than the buffer, the size_t subtraction underflows and lets the parser read beyond ana_log_buf. Check the current offset before the first subtraction and compare each object size with the remaining buffer instead. This rejects inconsistent ANA data before dereferencing a truncated group descriptor or walking an oversized namespace ID array.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 30, 2026
EPSS
0.2% · 11th 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%

Get told when this record changes

  • 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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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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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

    • 4.19affected
    • 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba and later · before 52c4294f3c26ec9db0e6f2e599096673d6f0f34daffected · git
    • 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba and later · before fe6e003c132b7c204f63e7a7ec422904fa3141b6affected · git
    • 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba and later · before 08ab1e2dddf26248d5e6246046096b281cf5a319affected · git
    • 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba and later · before 3045128294d347fd38542ad6e174b1b34d9c0751affected · git
    • 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba and later · before 03a0c21f0fd7a872953aae5714303d8f38d1e567affected · git
    • 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba and later · before 49e8a3224c91fd5fbf22f4adcca6c8209cfdd6feaffected · git
    • 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba and later · before e5cdb0c0a51e8ff49914ae16ef5360010c40cc85affected · git
    • 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba and later · before 63fa2d9c9c37020bd2703fe2a6a38027b5abeb15affected · git
    • before 4.19not 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 7.2.10-17.2.10-1

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-2026-98724Oct 18, 2026 · nvmet: pci-epf: reject too-short SGL segments
    0Monitor
  • ← EarlierCVE-2026-98725Oct 18, 2026 · nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
    0Monitor
  • Later →CVE-2026-98727Oct 18, 2026 · nvme-multipath: set BLK_FEAT_ZONED only after the zone info is known
    0Monitor

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 Linux03a0c21f0fd7a872953aae5714303d8f38d1e567Vendor (CNA)
Linux Linux08ab1e2dddf26248d5e6246046096b281cf5a319Vendor (CNA)
Linux Linux3045128294d347fd38542ad6e174b1b34d9c0751Vendor (CNA)
Linux Linux49e8a3224c91fd5fbf22f4adcca6c8209cfdd6feVendor (CNA)
Linux Linux52c4294f3c26ec9db0e6f2e599096673d6f0f34dVendor (CNA)
Linux Linux63fa2d9c9c37020bd2703fe2a6a38027b5abeb15Vendor (CNA)
Linux Linuxe5cdb0c0a51e8ff49914ae16ef5360010c40cc85Vendor (CNA)
Linux Linuxfe6e003c132b7c204f63e7a7ec422904fa3141b6Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 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. TodayNov 6, 2026+19 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).

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