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NVD / CVE Program· CNA Linux

CVE-2026-46291: crypto: caam - guard HMAC key hex dumps in hash_digest_key

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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 177730a273b18e195263ed953853273e901b5064, 2adbfca7452eeac45117b8e803288a2767f7075f, 5cffe3c136891aa4d579bf5c079a68f7cb371b0c; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.

Low priority for now. Upgrade to Linux Linux 177730a273b18e195263ed953853273e901b5064, 2adbfca7452eeac45117b8e803288a2767f7075f, 5cffe3c136891aa4d579bf5c079a68f7cb371b0c; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1 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: crypto: caam - guard HMAC key hex dumps in hash_digest_key Use print_hex_dump_devel() for dumping sensitive HMAC key bytes in hash_digest_key() to avoid leaking secrets at runtime when CONFIG_DYNAMIC_DEBUG is enabled.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 8, 2026
Updated
Jul 23, 2026
EPSS
0.1% · 2th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
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.

Follow CVE-2026-46291

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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.6 and later · before 5.10.259
  • linux linux kernel5.11 and later · before 5.15.210
  • linux linux kernel5.16 and later · before 6.1.176
  • linux linux kernel6.2 and later · before 6.6.140
  • linux linux kernel6.7 and later · before 6.12.88
  • linux linux kernel6.13 and later · before 6.18.30
  • linux linux kernel6.19 and later · before 7.0.7

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

    • 3.6affected
    • 045e36780f11523e26d1e4a8c78bdc57f4003bd0 and later · before e8e72fdf47bd5ef7abe642b034c6178a61a8580aaffected · git
    • 045e36780f11523e26d1e4a8c78bdc57f4003bd0 and later · before cd849c07b8d706425e60a4dfcef54b7b67c967ceaffected · git
    • 045e36780f11523e26d1e4a8c78bdc57f4003bd0 and later · before a9207798fe619cbc85c8744a9b9e2af1db2b6e1aaffected · git
    • 045e36780f11523e26d1e4a8c78bdc57f4003bd0 and later · before 2adbfca7452eeac45117b8e803288a2767f7075faffected · git
    • 045e36780f11523e26d1e4a8c78bdc57f4003bd0 and later · before c7e52fe3f7901ccb9cd29b3f7c683d809ba87e48affected · git
    • 045e36780f11523e26d1e4a8c78bdc57f4003bd0 and later · before 5cffe3c136891aa4d579bf5c079a68f7cb371b0caffected · git
    • 045e36780f11523e26d1e4a8c78bdc57f4003bd0 and later · before b8f12d9b00c1950779e5679b9c13908584682bb6affected · git
    • 045e36780f11523e26d1e4a8c78bdc57f4003bd0 and later · before 177730a273b18e195263ed953853273e901b5064affected · git
    • before 3.6not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.88-16.12.88-1
Debian:14linuxbefore 7.0.7-17.0.7-1
openSUSE:Tumbleweedkernel-sourcebefore 7.0.12-1.17.0.12-1.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-46289Jun 8, 2026 · lib/scatterlist: fix length calculations in extract_kvec_to_sg
    39Monitor
  • ← EarlierCVE-2026-46290Jun 8, 2026 · x86/efi: Fix graceful fault handling after FPU softirq changes
    22Monitor
  • Later →CVE-2026-46292Jun 8, 2026 · pmdomain: core: Fix detach procedure for virtual devices in genpd
    22Monitor

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 Linux177730a273b18e195263ed953853273e901b5064Vendor (CNA)
Linux Linux2adbfca7452eeac45117b8e803288a2767f7075fVendor (CNA)
Linux Linux5cffe3c136891aa4d579bf5c079a68f7cb371b0cVendor (CNA)
Linux Linuxa9207798fe619cbc85c8744a9b9e2af1db2b6e1aVendor (CNA)
Linux Linuxb8f12d9b00c1950779e5679b9c13908584682bb6Vendor (CNA)
Linux Linuxc7e52fe3f7901ccb9cd29b3f7c683d809ba87e48Vendor (CNA)
Linux Linuxcd849c07b8d706425e60a4dfcef54b7b67c967ceVendor (CNA)
Linux Linuxe8e72fdf47bd5ef7abe642b034c6178a61a8580aVendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.141.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)
opensuse:kernel-source7.0.12-1.1 · openSUSE:TumbleweedPackage 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.

No history yet (it accumulates with the daily EPSS job).

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

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

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

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