CVE-2026-1709: A flaw was found in Keylime

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CRITICAL 9.4REMOTEWATCHLISTMITIGATEMITIGATEMITIGATE

CVE-2026-1709 is a critical-severity flaw (CVSS 9.4) affecting enterprise linux, enterprise linux eus, enterprise linux for arm 64. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in Keylime. The Keylime registrar, since version 7.12.0, does not enforce client-side Transport Layer Security (TLS) authentication. This authentication bypass vulnerability allows unauthenticated clients with network access to perform administrative operations, including listing agents, retrieving public Trusted Platform Module (TPM) data, and deleting agents, by connecting without presenting a client certificate.

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.4 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.8% (top 7%)
CISA exploited list	No
Weakness	CWE-322
Published	2026-02-06
Last modified	2026-07-15

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

Last updated 2026-07-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-06 20:16 UTCPublished CVE record published
2026-07-15 02:18 UTCUpdated Record last modified

redhat enterprise linux MITIGATE

Affected: 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux eus MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux for arm 64 MITIGATE

Affected: 9.0_aarch64 · 10.0_aarch64

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0_aarch64

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux for arm 64 eus MITIGATE

Affected: 10.0_aarch64

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0_aarch64

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux for ibm z systems MITIGATE

Affected: 9.0_s390x · 10.0_s390x

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0_s390x

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux for ibm z systems eus MITIGATE

Affected: 10.0_s390x

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0_s390x

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Python (pip) · keylime · FIXED · 7.12.2 · vulnerable: >= 7.12.0, < 7.12.2 · source

pip install --upgrade "keylime>=7.12.2" pip show keylime

Fedora 46 · proftpd · FIXED · 1.3.9e-2.fc46 · FEDORA-2026-fcb0a25c2f · source

sudo dnf upgrade --advisory=FEDORA-2026-fcb0a25c2f

RHEL 10 · keylime · FIXED · keylime-7.12.1-11.el10_1.4

sudo dnf upgrade --advisory=RHSA-2026:2225 rpm -q keylime

RHEL 10.0 Extended Update Support · keylime · FIXED · keylime-7.12.1-2.el10_0.5

sudo dnf upgrade --advisory=RHSA-2026:2298 rpm -q keylime

RHEL 9 · keylime · FIXED · keylime-7.12.1-11.el9_7.4

sudo dnf upgrade --advisory=RHSA-2026:2224 rpm -q keylime

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-1709?

enterprise linux: mitigate or apply the listed mitigation; enterprise linux eus: mitigate or apply the listed mitigation; enterprise linux for arm 64: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-1709 being exploited?

CVE-2026-1709 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-1709 affect?

CVE-2026-1709 affects enterprise linux, enterprise linux eus, enterprise linux for arm 64. Severity is critical (CVSS 9.4). A flaw was found in Keylime. The Keylime registrar, since version 7.12.0, does not enforce client-side Transport Layer Security (TLS) authentication. This authentication bypass vulnerability allows unauthenticated clients with network acces

How urgent is CVE-2026-1709?

Priority 66/100. Critical severity; EPSS top 7%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

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References

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