CVE-2017-7393
CVE-2017-7393 is a high-severity vulnerability in Tigervnc with a CVSS 3.x base score of 8.8. 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-415.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.5
- EPSS exploit prediction: 2% (76th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-415
- Affected product: Tigervnc
- Published:
- Last modified:
Description
In TigerVNC 1.7.1 (VNCSConnectionST.cxx VNCSConnectionST::fence), an authenticated client can cause a double free, leading to denial of service or potentially code execution.
Frequently asked questions
- What is CVE-2017-7393?
- In TigerVNC 1.7.1 (VNCSConnectionST.cxx VNCSConnectionST::fence), an authenticated client can cause a double free, leading to denial of service or potentially code execution.
- How severe is CVE-2017-7393?
- CVE-2017-7393 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2017-7393 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2017-7393?
- CVE-2017-7393 affects Tigervnc. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2017-7393?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2017-7393 published?
- CVE-2017-7393 was published on 2017-04-01 and last updated on 2026-06-17.
References
- http://www.securityfocus.com/bid/97305
- https://access.redhat.com/errata/RHSA-2017:2000
- https://github.com/TigerVNC/tigervnc/pull/438
- https://security.gentoo.org/glsa/201801-13
Affected products (1)
- cpe:2.3:a:tigervnc:tigervnc:1.7.1:*:*:*:*:*:*:*
More vulnerabilities in Tigervnc
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- CVE-2014-8241 — Critical (CVSS 9.8): XRegion in TigerVNC allows remote VNC servers to cause a denial of service (NULL pointer dereference) by leveraging…
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- CVE-2026-43011 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: net/x25: Fix potential double free of skb When…
- CVE-2026-31609 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid double-free in…
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