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NVD / CVE Program· CNA Linux

CVE-2026-68130: ksmbd: defer destroy_previous_session() until after NTLM authentication

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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0ff12308c8a6c16ab68f0a487ffa93d69001dc18, 18705cace0619fd2123737dcd028147774f38181, 243f1614ef2aca2d62a744575f1c24b07cd42757; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0ff12308c8a6c16ab68f0a487ffa93d69001dc18, 18705cace0619fd2123737dcd028147774f38181, 243f1614ef2aca2d62a744575f1c24b07cd42757; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1 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: ksmbd: defer destroy_previous_session() until after NTLM authentication In ntlm_authenticate(), destroy_previous_session() is called using a user pointer resolved from the client-supplied NTLM blob username field before the NTLMv2 response is validated. An authenticated attacker can set the NTLM blob username to match a victim account and set PreviousSessionId to the victim's session ID; destroy_previous_session() destroys the victim's session while ksmbd_decode_ntlmssp_auth_blob() subsequently rejects the request with -EPERM. Move destroy_previous_session() and the prev_id assignment to after ksmbd_decode_ntlmssp_auth_blob() returns success and use sess->user rather than the pre-authentication lookup result. This matches the ordering already used by krb5_authenticate(), where destroy_previous_session() is called only after ksmbd_krb5_authenticate() returns success.

—No exploit Fix available
Published
Aug 10, 2026
Updated
Aug 23, 2026
EPSS
0.2% · 12th 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 · 0.2%

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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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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

    • 5.15affected
    • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and later · before ab0230257ebdf48b07eaa679a8c92bc842fe3498affected · git
    • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and later · before 370b0ec8822b69c9073265e16b7daaa8201c9a4faffected · git
    • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and later · before 5c833074b549e5db125436a6f681af682261f785affected · git
    • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and later · before 243f1614ef2aca2d62a744575f1c24b07cd42757affected · git
    • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and later · before 18705cace0619fd2123737dcd028147774f38181affected · git
    • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and later · before 0ff12308c8a6c16ab68f0a487ffa93d69001dc18affected · git
    • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and later · before c74801ee524f477c174a1899782b6c3b6918d407affected · git
    • before 5.15not affected · semver
    • 5.15.217 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

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-2026-68124Aug 10, 2026 · mctp: serial: handle zero-length frames to prevent rx buffer overflow
    38Monitor
  • ← EarlierCVE-2026-68126Aug 10, 2026 · mac802154: hold an interface reference across the scan worker
    0Monitor
  • Later →CVE-2026-68132Aug 10, 2026 · super: fix emergency thaw deadlock on frozen block devices
    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 Linux0ff12308c8a6c16ab68f0a487ffa93d69001dc18Vendor (CNA)
Linux Linux18705cace0619fd2123737dcd028147774f38181Vendor (CNA)
Linux Linux243f1614ef2aca2d62a744575f1c24b07cd42757Vendor (CNA)
Linux Linux370b0ec8822b69c9073265e16b7daaa8201c9a4fVendor (CNA)
Linux Linux5c833074b549e5db125436a6f681af682261f785Vendor (CNA)
Linux Linuxab0230257ebdf48b07eaa679a8c92bc842fe3498Vendor (CNA)
Linux Linuxc74801ee524f477c174a1899782b6c3b6918d407Vendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~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✗ → ✓

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References

Show all references (6 more)

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

All records