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NVD / CVE Program· CNA Linux

CVE-2026-99221: keys/trusted_keys: return immediately after TPM unseal 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 234d09bb3b3d84851d4b3246272addc30f3353eb, 2d92a0f87c338a08367aff05edd1ade86da4ac8d, 4876f09ce222e140a73aad950882b3605440c935.

Low priority for now. Upgrade to Linux Linux 234d09bb3b3d84851d4b3246272addc30f3353eb, 2d92a0f87c338a08367aff05edd1ade86da4ac8d, 4876f09ce222e140a73aad950882b3605440c935 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: keys/trusted_keys: return immediately after TPM unseal failure trusted_tpm_unseal() proceeds to pcrlock() when the TPM unseal operation fails. If pcrlock() succeeds, its return value overwrites the unseal error, causing key instantiation to succeed. Return immediately when unseal fails to preserve the original error.

—No exploit Fix available
Published
Nov 2, 2026
Updated
Nov 3, 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

If any of these changes, we'll tell you in the daily email digest.

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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.

—

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

    • 5.13affected
    • 5d0682be318910e028bdf57c90a1695ffc34be37 and later · before 4876f09ce222e140a73aad950882b3605440c935affected · git
    • 5d0682be318910e028bdf57c90a1695ffc34be37 and later · before 2d92a0f87c338a08367aff05edd1ade86da4ac8daffected · git
    • 5d0682be318910e028bdf57c90a1695ffc34be37 and later · before 234d09bb3b3d84851d4b3246272addc30f3353ebaffected · git
    • 5d0682be318910e028bdf57c90a1695ffc34be37 and later · before 6e359d8cb8580b9874801dea930086effd4d9c62affected · git
    • 5d0682be318910e028bdf57c90a1695ffc34be37 and later · before e55d48f21f591a9fe80d26b5fbd1912ea725d9e6affected · git
    • 5d0682be318910e028bdf57c90a1695ffc34be37 and later · before 63b19ec2863b2cb5279b746ecd3d6210b1a93945affected · git
    • 5d0682be318910e028bdf57c90a1695ffc34be37 and later · before ed697a5f667435bbb1cedbe5bd9f300de645047daffected · git
    • 5d0682be318910e028bdf57c90a1695ffc34be37 and later · before f92d0ccb05bf9089072cb067dda0dffd5394c4efaffected · git
    • before 5.13not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.115-16.12.115-1

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-2026-99219Nov 2, 2026 · ftrace: Initialize modname and offset in print_rec()
    0Monitor
  • ← EarlierCVE-2026-99220Nov 2, 2026 · asymmetric_keys: reject trust keys without IDs
    0Monitor
  • Later →CVE-2026-99222Nov 2, 2026 · keys: Protect the read method check against type removal
    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 Linux234d09bb3b3d84851d4b3246272addc30f3353ebVendor (CNA)
Linux Linux2d92a0f87c338a08367aff05edd1ade86da4ac8dVendor (CNA)
Linux Linux4876f09ce222e140a73aad950882b3605440c935Vendor (CNA)
Linux Linux63b19ec2863b2cb5279b746ecd3d6210b1a93945Vendor (CNA)
Linux Linux6e359d8cb8580b9874801dea930086effd4d9c62Vendor (CNA)
Linux Linuxe55d48f21f591a9fe80d26b5fbd1912ea725d9e6Vendor (CNA)
Linux Linuxed697a5f667435bbb1cedbe5bd9f300de645047dVendor (CNA)
Linux Linuxf92d0ccb05bf9089072cb067dda0dffd5394c4efVendor (CNA)
debian:linux6.12.115-1 · Debian:13Package 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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 5, 2026+3 d
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).

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✗ → ✓
  2. Exploit maturity— → none

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