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

CVE-2026-98227: memstick: ms_block: destroy io_queue workqueue on removal

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 0ff795163f37109a134b5a421558530f8d091544, 19c3da6621a253f1f8b937ed91bc22330a930d9c, 6611f78ec3fd4b33a00bfda20725b254a22979f6; 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 0ff795163f37109a134b5a421558530f8d091544, 19c3da6621a253f1f8b937ed91bc22330a930d9c, 6611f78ec3fd4b33a00bfda20725b254a22979f6; 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: memstick: ms_block: destroy io_queue workqueue on removal msb_init_disk() creates the per-card ordered workqueue msb->io_queue with alloc_ordered_workqueue(). It is torn down with destroy_workqueue() only on the init error path; msb_remove() never destroys it. msb_stop() merely flushes the queue, and neither msb_data_clear() nor put_disk() free it. As a result every card insert/remove cycle leaks the workqueue and its kworker, exhausting kernel memory over repeated cycles. Destroy the workqueue in msb_remove() after the disk has been removed and the queue drained.

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

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  • 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

    • 3.12affected
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 0ff795163f37109a134b5a421558530f8d091544affected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 19c3da6621a253f1f8b937ed91bc22330a930d9caffected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 9a2e7cdc0880e735aff0968ee402f2c92a992b9baffected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 6611f78ec3fd4b33a00bfda20725b254a22979f6affected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before f222bb8c30cf5699c560b29179ff2bddcac1f950affected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 90af7fde083e1b22c349c3a8b1626728e44e474caffected · git
    • before 3.12not affected · semver
    • 6.1.189 and later · up to and including 6.1.*not affected · semver
    • 6.6.158 and later · up to and including 6.6.*not 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-2026-98225Oct 6, 2026 · mm/shrinker: fix bogus set_shrinker_bit() with cgroup.memory=nokmem
    0Monitor
  • ← EarlierCVE-2026-98226Oct 6, 2026 · mm, swap: fix SWAP_USAGE_OFFLIST_BIT collision with real usage count
    0Monitor
  • Later →CVE-2026-98228Oct 6, 2026 · mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
    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 Linux0ff795163f37109a134b5a421558530f8d091544Vendor (CNA)
Linux Linux19c3da6621a253f1f8b937ed91bc22330a930d9cVendor (CNA)
Linux Linux6611f78ec3fd4b33a00bfda20725b254a22979f6Vendor (CNA)
Linux Linux90af7fde083e1b22c349c3a8b1626728e44e474cVendor (CNA)
Linux Linux9a2e7cdc0880e735aff0968ee402f2c92a992b9bVendor (CNA)
Linux Linuxf222bb8c30cf5699c560b29179ff2bddcac1f950Vendor (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 7, 2026+32 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 (5 more)

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

All records