Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-46161: md/raid10: fix divide-by-zero in setup_geo() with zero far_copies

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.13% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0b43a70394ce492274e67463326be03e0a9897c5, 4af2e558e6fdfb972c61350653fd55d1f62b60a5, 553e32adfa1a96b217651139a3f8c3b92b9984ac; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0b43a70394ce492274e67463326be03e0a9897c5, 4af2e558e6fdfb972c61350653fd55d1f62b60a5, 553e32adfa1a96b217651139a3f8c3b92b9984ac; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1 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: md/raid10: fix divide-by-zero in setup_geo() with zero far_copies setup_geo() extracts near_copies (nc) and far_copies (fc) from the user-provided layout parameter without checking for zero. When fc=0 with the "improved" far set layout selected, 'geo->far_set_size = disks / fc' triggers a divide-by-zero. Validate nc and fc immediately after extraction, returning -1 if either is zero.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 28, 2026
Updated
Oct 15, 2026
EPSS
0.1% · 2th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
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.

Follow CVE-2026-46161

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.9.1 and later · before 5.10.258
  • linux linux kernel5.11 and later · before 5.15.209
  • linux linux kernel5.16 and later · before 6.1.175
  • linux linux kernel6.2 and later · before 6.6.140
  • linux linux kernel6.7 and later · before 6.12.88
  • linux linux kernel6.13 and later · before 6.18.30
  • linux linux kernel6.19 and later · before 7.0.7
  • linux linux kernel3.9
  • linux linux kernel7.1

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

    • 3.9affected
    • 475901aff15841fb0a81e7546517407779a9b061 and later · before 0b43a70394ce492274e67463326be03e0a9897c5affected · git
    • 475901aff15841fb0a81e7546517407779a9b061 and later · before c716ab3034f84f8a6c226814247b8c5ac9f95da1affected · git
    • 475901aff15841fb0a81e7546517407779a9b061 and later · before 553e32adfa1a96b217651139a3f8c3b92b9984acaffected · git
    • 475901aff15841fb0a81e7546517407779a9b061 and later · before 4af2e558e6fdfb972c61350653fd55d1f62b60a5affected · git
    • 475901aff15841fb0a81e7546517407779a9b061 and later · before 9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cdaaffected · git
    • 475901aff15841fb0a81e7546517407779a9b061 and later · before 913d556e4bd1b56ed822815655b82c7bb54edc51affected · git
    • 475901aff15841fb0a81e7546517407779a9b061 and later · before f9ddb621b2325eb69c95692958daf2bab4dea2c4affected · git
    • 475901aff15841fb0a81e7546517407779a9b061 and later · before 9aa6d860b0930e2f72795665c42c44252a558a0caffected · git
    • before 3.9not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.88-16.12.88-1
Debian:14linuxbefore 7.0.7-17.0.7-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-46157May 28, 2026 · ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger
    31Monitor
  • ← EarlierCVE-2026-46159May 28, 2026 · btrfs: fix btrfs_ioctl_space_info() slot_count TOCTOU which can lead to info-leak
    18Monitor
  • Later →CVE-2026-46163May 28, 2026 · wifi: b43legacy: enforce bounds check on firmware key index in RX path
    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 Linux0b43a70394ce492274e67463326be03e0a9897c5Vendor (CNA)
Linux Linux4af2e558e6fdfb972c61350653fd55d1f62b60a5Vendor (CNA)
Linux Linux553e32adfa1a96b217651139a3f8c3b92b9984acVendor (CNA)
Linux Linux913d556e4bd1b56ed822815655b82c7bb54edc51Vendor (CNA)
Linux Linux9aa6d860b0930e2f72795665c42c44252a558a0cVendor (CNA)
Linux Linux9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cdaVendor (CNA)
Linux Linuxc716ab3034f84f8a6c226814247b8c5ac9f95da1Vendor (CNA)
Linux Linuxf9ddb621b2325eb69c95692958daf2bab4dea2c4Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.141.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · 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.

No dated events beyond publication.

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.

  • CVE-2026-461840 days apartsound: ua101: fix division by zero at probe
    22Monitor
  • CVE-2026-458411 days apartnetfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO
    22Monitor
  • CVE-2026-458891 days apartmptcp: do not account for OoO in mptcp_rcvbuf_grow()
    22Monitor
  • CVE-2026-4335420 days apartiio: proximity: hx9023s: Protect against division by zero in set_samp_freq
    22Monitor
  • CVE-2026-4341120 days aparttipc: fix divide-by-zero in tipc_sk_filter_connect()
    22Monitor
  • CVE-2026-4323822 days apartnet/sched: act_skbedit: fix divide-by-zero in tcf_skbedit_hash()
    22Monitor

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-369 · Divide By Zero

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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. Fix✗ → ✓

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

References

Show all references (8 more)

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

All records