How severe is CVE-2017-11124?

CVE-2017-11124 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-11124 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-11124?

CVE-2017-11124 affects Xar Project Xar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-11124?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2017-11124 published?

CVE-2017-11124 was published on 2017-07-10 and last updated on 2026-06-17.

CVE-2017-11124

CVE-2017-11124 is a critical-severity vulnerability in Xar Project Xar with a CVSS 3.x base score of 9.8. 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-476.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Xar Project Xar
Published: 2017-07-10
Last modified: 2026-06-17

Description

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

Frequently asked questions

What is CVE-2017-11124?: libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.
How severe is CVE-2017-11124?: CVE-2017-11124 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-11124 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-11124?: CVE-2017-11124 affects Xar Project Xar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-11124?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-11124 published?: CVE-2017-11124 was published on 2017-07-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xar_project:xar:1.6.1:*:*:*:*:*:*:*

More vulnerabilities in Xar Project Xar

CVE-2017-11125 — Critical (CVSS 9.8): libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_get_path function in util.c.

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