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

CVE-2026-98204: Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block()

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 29fbcf5834f0a7f74bfd017c07da2411b35a4e2a, 50dd585bee7669eb165e5defcc35d17f3822cfbb, 51cfe54f815ae175c7d1126b983d4d7c89715004; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 29fbcf5834f0a7f74bfd017c07da2411b35a4e2a, 50dd585bee7669eb165e5defcc35d17f3822cfbb, 51cfe54f815ae175c7d1126b983d4d7c89715004; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 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: Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block() When chunking writes into SMBus blocks in rmi_smb_write_block(), the loop calculates block_len using the original total length (len) instead of the remaining length (cur_len). If len is greater than 32 bytes (SMB_MAX_COUNT), block_len remains 32 for every iteration, even on the final partial chunk where fewer than 32 bytes remain. This causes smb_block_write() to read 32 bytes from the advanced data buffer pointer, reading past the end of the input buffer. Fix this by calculating block_len using cur_len and advancing the buffer and address pointers by block_len.

—No exploit Fix available
Published
Oct 6, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th 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 · 0.1%

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

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • 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

    • 4.10affected
    • 82264d0cf7aef2247563c031ff2ab96579d5d0cc and later · before d01337c0892d1509500c727edf81380777c2dd0faffected · git
    • 82264d0cf7aef2247563c031ff2ab96579d5d0cc and later · before 7c800af1c6030a5f27d46ce7d6d5d75f9c1efaf8affected · git
    • 82264d0cf7aef2247563c031ff2ab96579d5d0cc and later · before 29fbcf5834f0a7f74bfd017c07da2411b35a4e2aaffected · git
    • 82264d0cf7aef2247563c031ff2ab96579d5d0cc and later · before 50dd585bee7669eb165e5defcc35d17f3822cfbbaffected · git
    • 82264d0cf7aef2247563c031ff2ab96579d5d0cc and later · before e022538e13dd1c82af5ec25ac28f12ca0ab26160affected · git
    • 82264d0cf7aef2247563c031ff2ab96579d5d0cc and later · before dc05ec97b8299e48e31367a9bc412c7e9c0e2b42affected · git
    • 82264d0cf7aef2247563c031ff2ab96579d5d0cc and later · before 9f0ce5e162eed8b68345abe839c59768bc60f99aaffected · git
    • 82264d0cf7aef2247563c031ff2ab96579d5d0cc and later · before 51cfe54f815ae175c7d1126b983d4d7c89715004affected · git
    • before 4.10not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.8-17.2.8-1

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-2026-98202Oct 6, 2026 · Input: synaptics-rmi4 - fix GPF in suspend and resume when unbound
    0Monitor
  • ← EarlierCVE-2026-98203Oct 6, 2026 · Input: soc_button_array - check btns_desc->package.count
    0Monitor
  • Later →CVE-2026-98205Oct 6, 2026 · Input: evdev - zero absinfo before partial copy in EVIOCSABS
    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 Linux29fbcf5834f0a7f74bfd017c07da2411b35a4e2aVendor (CNA)
Linux Linux50dd585bee7669eb165e5defcc35d17f3822cfbbVendor (CNA)
Linux Linux51cfe54f815ae175c7d1126b983d4d7c89715004Vendor (CNA)
Linux Linux7c800af1c6030a5f27d46ce7d6d5d75f9c1efaf8Vendor (CNA)
Linux Linux9f0ce5e162eed8b68345abe839c59768bc60f99aVendor (CNA)
Linux Linuxd01337c0892d1509500c727edf81380777c2dd0fVendor (CNA)
Linux Linuxdc05ec97b8299e48e31367a9bc412c7e9c0e2b42Vendor (CNA)
Linux Linuxe022538e13dd1c82af5ec25ac28f12ca0ab26160Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux7.2.8-1 · Debian:14Package 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 9, 2026+34 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