How severe is CVE-2021-26314?

CVE-2021-26314 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-26314 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26314?

CVE-2021-26314 primarily affects Xen. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26314?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-26314 published?

CVE-2021-26314 was published on 2021-06-09 and last updated on 2026-06-17.

CVE-2021-26314

CVE-2021-26314 is a medium-severity vulnerability in Xen with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Xen
Published: 2021-06-09
Last modified: 2026-06-17

Description

Potential floating point value injection in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution with incorrect floating point results, may cause the use of incorrect data from FPVI and may result in data leakage.

Frequently asked questions

What is CVE-2021-26314?: Potential floating point value injection in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution with incorrect floating point results, may cause the use of incorrect data from FPVI and may result in data leakage.
How severe is CVE-2021-26314?: CVE-2021-26314 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-26314 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26314?: CVE-2021-26314 primarily affects Xen. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26314?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26314 published?: CVE-2021-26314 was published on 2021-06-09 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
cpe:2.3:h:arm:cortex-a72:-:*:*:*:*:*:*:*
cpe:2.3:h:broadcom:bcm2711:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:core_i7-10700k:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:core_i7-7700k:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:core_i9-9900k:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:xeon_silver_4214:-:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

More vulnerabilities in Xen

CVE-2017-10921 — Critical (CVSS 10.0): The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and…
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CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
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