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NVD / CVE Program· CNA Linux

CVE-2026-89605: ecryptfs: release message context on send failure

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: 0.16% (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 177e0c32fec3602bb3b64139bb8bb610cd6722c7, 219644a3ad5518217b2d62cad6d2c36a2308c949, 30845ed227475a11a49ccce047837d016b7e0f49.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 177e0c32fec3602bb3b64139bb8bb610cd6722c7, 219644a3ad5518217b2d62cad6d2c36a2308c949, 30845ed227475a11a49ccce047837d016b7e0f49 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: ecryptfs: release message context on send failure ecryptfs_send_message_locked() moves a message context from the free list to the allocated list before sending the request to the userspace daemon. If ecryptfs_send_miscdev() fails, the context is left on the allocated list and cannot be reused. Move it back to the free list on failure and clear the caller's pointer.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Sep 11, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 6th 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.

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-2026-89605

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

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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.

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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

    • 2.6.26affected
    • f66e883eb6186bc43a79581b67aff7d1a69d0ff1 and later · before 177e0c32fec3602bb3b64139bb8bb610cd6722c7affected · git
    • f66e883eb6186bc43a79581b67aff7d1a69d0ff1 and later · before 743e7aeb9575c0838d8996d40d81a6b8fa5cd060affected · git
    • f66e883eb6186bc43a79581b67aff7d1a69d0ff1 and later · before 590fc6140e29c54d2f7839eb9df78d106ee1905eaffected · git
    • f66e883eb6186bc43a79581b67aff7d1a69d0ff1 and later · before 30845ed227475a11a49ccce047837d016b7e0f49affected · git
    • f66e883eb6186bc43a79581b67aff7d1a69d0ff1 and later · before 47ce611cb13f0eefa550d5434c1afcd4217bfc3eaffected · git
    • f66e883eb6186bc43a79581b67aff7d1a69d0ff1 and later · before 9319706316a8e79f374627554386d575a84b637faffected · git
    • f66e883eb6186bc43a79581b67aff7d1a69d0ff1 and later · before 654b7e79443f5ea90849f5c1cf70c0d94bd5b10eaffected · git
    • f66e883eb6186bc43a79581b67aff7d1a69d0ff1 and later · before 219644a3ad5518217b2d62cad6d2c36a2308c949affected · git
    • before 2.6.26not 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-2026-89602Sep 11, 2026 · erofs: skip sufficiently large global buffers when resizing
    31Monitor
  • ← EarlierCVE-2026-89604Sep 11, 2026 · efivarfs: Rate limit statfs() handler
    0Monitor
  • Later →CVE-2026-89606Sep 11, 2026 · ecryptfs: reject too-small tag 70 packets
    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 Linux177e0c32fec3602bb3b64139bb8bb610cd6722c7Vendor (CNA)
Linux Linux219644a3ad5518217b2d62cad6d2c36a2308c949Vendor (CNA)
Linux Linux30845ed227475a11a49ccce047837d016b7e0f49Vendor (CNA)
Linux Linux47ce611cb13f0eefa550d5434c1afcd4217bfc3eVendor (CNA)
Linux Linux590fc6140e29c54d2f7839eb9df78d106ee1905eVendor (CNA)
Linux Linux654b7e79443f5ea90849f5c1cf70c0d94bd5b10eVendor (CNA)
Linux Linux743e7aeb9575c0838d8996d40d81a6b8fa5cd060Vendor (CNA)
Linux Linux9319706316a8e79f374627554386d575a84b637fVendor (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.

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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