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NVD / CVE Program· CNA Linux

CVE-2026-89497: orangefs: skip leading spaces before parsing client debug masks

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.12% (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 0ef38d53bca5ea1375fea0d3d11e9727df064b85, 116d14f29a0524853c9316f32a2ac06cff5d4bf6, 15d79c806231e62a7b746d3b42626810004e1b27.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0ef38d53bca5ea1375fea0d3d11e9727df064b85, 116d14f29a0524853c9316f32a2ac06cff5d4bf6, 15d79c806231e62a7b746d3b42626810004e1b27 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: orangefs: skip leading spaces before parsing client debug masks orangefs_prepare_cdm_array() sizes each client debug keyword buffer with strcspn(cds_head, " "), but then parses the keyword with %s. The %s conversion skips leading whitespace, while strcspn() does not. If a client debug entry starts with a space, the allocation can be sized for an empty keyword while sscanf() copies the following non-empty token. This can write past the end of the allocated keyword buffer. Skip leading spaces before computing the keyword length so the allocation matches the string parsed by sscanf().

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Sep 11, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 2th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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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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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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

    • 4.6affected
    • f7be4ee07fb72a516563bc2870ef41fa589a964a and later · before 173bfd69696815bcf1c052f61cb69c26cca4e443affected · git
    • f7be4ee07fb72a516563bc2870ef41fa589a964a and later · before 995f4d05589f87452a56672270af28918c8939c3affected · git
    • f7be4ee07fb72a516563bc2870ef41fa589a964a and later · before 0ef38d53bca5ea1375fea0d3d11e9727df064b85affected · git
    • f7be4ee07fb72a516563bc2870ef41fa589a964a and later · before ce748ae1181d0daf5dd0d2d906d5c1cc328c153baffected · git
    • f7be4ee07fb72a516563bc2870ef41fa589a964a and later · before 15d79c806231e62a7b746d3b42626810004e1b27affected · git
    • f7be4ee07fb72a516563bc2870ef41fa589a964a and later · before 116d14f29a0524853c9316f32a2ac06cff5d4bf6affected · git
    • f7be4ee07fb72a516563bc2870ef41fa589a964a and later · before 1774c5b3713add32fe15ab0d3db4b73355f94e35affected · git
    • f7be4ee07fb72a516563bc2870ef41fa589a964a and later · before d410cd5303ec59c7cf23dd61423752ce8e9ecb59affected · git
    • before 4.6not 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 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-89495Sep 11, 2026 · ocfs2: bound namelen in dlm_migrate_request_handler
    39Monitor
  • ← EarlierCVE-2026-89496Sep 11, 2026 · ocfs2: always run deallocs on copy-on-write completion
    0Monitor
  • Later →CVE-2026-89498Sep 11, 2026 · orangefs: fix double-free of trailer_buf on readdir copy failure
    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 Linux0ef38d53bca5ea1375fea0d3d11e9727df064b85Vendor (CNA)
Linux Linux116d14f29a0524853c9316f32a2ac06cff5d4bf6Vendor (CNA)
Linux Linux15d79c806231e62a7b746d3b42626810004e1b27Vendor (CNA)
Linux Linux173bfd69696815bcf1c052f61cb69c26cca4e443Vendor (CNA)
Linux Linux1774c5b3713add32fe15ab0d3db4b73355f94e35Vendor (CNA)
Linux Linux995f4d05589f87452a56672270af28918c8939c3Vendor (CNA)
Linux Linuxce748ae1181d0daf5dd0d2d906d5c1cc328c153bVendor (CNA)
Linux Linuxd410cd5303ec59c7cf23dd61423752ce8e9ecb59Vendor (CNA)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~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.

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.

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

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

Weakness class (CWE)

—

CVSS vector

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

nvd-secondary

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 (7 more)

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

All records