How severe is CVE-2013-1056?

CVE-2013-1056 has a CVSS 2.0 base score of 1.9, rated low severity.

Is CVE-2013-1056 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-1056?

CVE-2013-1056 primarily affects Canonical Ubuntu Linux. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-1056?

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

When was CVE-2013-1056 published?

CVE-2013-1056 was published on 2013-10-28 and last updated on 2026-06-16.

CVE-2013-1056

CVE-2013-1056 is a low-severity vulnerability in Canonical Ubuntu Linux with a CVSS 2.0 base score of 1.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 2.0 base score 1.9)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Canonical Ubuntu Linux
Published: 2013-10-28
Last modified: 2026-06-16

Description

X.org X server 1.13.3 and earlier, when not run as root, allows local users to cause a denial of service (crash) or possibly gain privileges via vectors involving cached xkb files.

Frequently asked questions

What is CVE-2013-1056?: X.org X server 1.13.3 and earlier, when not run as root, allows local users to cause a denial of service (crash) or possibly gain privileges via vectors involving cached xkb files.
How severe is CVE-2013-1056?: CVE-2013-1056 has a CVSS 2.0 base score of 1.9, rated low severity.
Is CVE-2013-1056 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-1056?: CVE-2013-1056 primarily affects Canonical Ubuntu Linux. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-1056?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-1056 published?: CVE-2013-1056 was published on 2013-10-28 and last updated on 2026-06-16.

References

http://www.ubuntu.com/usn/USN-1990-1

Affected products (3)

cpe:2.3:o:canonical:ubuntu_linux:12.04:-:lts:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:13.04:*:*:*:*:*:*:*

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