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NVD / CVE Program· CNA Linux

CVE-2026-89498: orangefs: fix double-free of trailer_buf on readdir copy failure

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 2f5454a25127854c232fde5d1d65d16fbcd42d43, 433c2e470053cc9c712314d3d8c3dfbc862d68eb, 519f4146b8b8c5f20c2ad01913acd6df2df8fc8e.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2f5454a25127854c232fde5d1d65d16fbcd42d43, 433c2e470053cc9c712314d3d8c3dfbc862d68eb, 519f4146b8b8c5f20c2ad01913acd6df2df8fc8e 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: fix double-free of trailer_buf on readdir copy failure On a readdir downcall, orangefs_devreq_write_iter() frees op->downcall.trailer_buf with vfree() when copy_from_iter_full() fails, but does not clear the pointer before goto Efault. The waiter in do_readdir() is then woken with a negative status and frees the same pointer again on its r < 0 path, causing a deterministic double-free. A client holding /dev/pvfs2-req triggers it by sending a readdir downcall whose declared trailer_size exceeds the bytes it supplies. Clear the pointer after freeing so the readdir-side vfree() becomes a no-op.

—No exploit Fix available
Published
Sep 11, 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

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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

    • 4.12affected
    • 382f4581e67f57209c7aa67e39f26ba076306a2e and later · before 712c4235fcc73c11a2f1d59a499d489e49c374a4affected · git
    • 382f4581e67f57209c7aa67e39f26ba076306a2e and later · before 433c2e470053cc9c712314d3d8c3dfbc862d68ebaffected · git
    • 382f4581e67f57209c7aa67e39f26ba076306a2e and later · before 6e5924644ef4bce06a3cbb7cb841a8bbfdfc03adaffected · git
    • 382f4581e67f57209c7aa67e39f26ba076306a2e and later · before 9c9eacc47c618ed6d7d35fe75a40d294c8cdbffaaffected · git
    • 382f4581e67f57209c7aa67e39f26ba076306a2e and later · before 2f5454a25127854c232fde5d1d65d16fbcd42d43affected · git
    • 382f4581e67f57209c7aa67e39f26ba076306a2e and later · before f796f38a324e89547738f4b70cc33be5be2bc6daaffected · git
    • 382f4581e67f57209c7aa67e39f26ba076306a2e and later · before 519f4146b8b8c5f20c2ad01913acd6df2df8fc8eaffected · git
    • 382f4581e67f57209c7aa67e39f26ba076306a2e and later · before f574296be7f46eb60beca851240b526df232f480affected · git
    • before 4.12not 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-2026-89496Sep 11, 2026 · ocfs2: always run deallocs on copy-on-write completion
    0Monitor
  • ← EarlierCVE-2026-89497Sep 11, 2026 · orangefs: skip leading spaces before parsing client debug masks
    31Monitor
  • Later →CVE-2026-89499Sep 11, 2026 · ring-buffer: Stop remote reader update when page swap fails
    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 Linux2f5454a25127854c232fde5d1d65d16fbcd42d43Vendor (CNA)
Linux Linux433c2e470053cc9c712314d3d8c3dfbc862d68ebVendor (CNA)
Linux Linux519f4146b8b8c5f20c2ad01913acd6df2df8fc8eVendor (CNA)
Linux Linux6e5924644ef4bce06a3cbb7cb841a8bbfdfc03adVendor (CNA)
Linux Linux712c4235fcc73c11a2f1d59a499d489e49c374a4Vendor (CNA)
Linux Linux9c9eacc47c618ed6d7d35fe75a40d294c8cdbffaVendor (CNA)
Linux Linuxf574296be7f46eb60beca851240b526df232f480Vendor (CNA)
Linux Linuxf796f38a324e89547738f4b70cc33be5be2bc6daVendor (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

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. 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