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CVE-2018-14599
An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by…
- 9.8CriticalCVSS base score
- 4.2%Exploitation in 30 daysEPSS · top 9.0% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.
Timeline
ID reserved
By mitre
- 29 days later
· 29 days later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 4.2% · top 9.0% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
n/a
- affected n/a
References
12
- USN-3758-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://bugzilla.suse.com/show_bug.cgi?id=1102062 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=b469da1430cdcee06e31c6251b83aede072a1ff0 (opens in a new tab)x_refsource_CONFIRMx_transferred
- GLSA-201811-01 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- 105177 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- [oss-security] 20180821 X.Org security advisory: August 21, 2018 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 1041543 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- [debian-lts-announce] 20180829 [SECURITY] [DLA 1482-1] libx11 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [xorg-announce] 20180821 libX11 1.6.6 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- USN-3758-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- FEDORA-2019-6a756fe3a5 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- RHSA-2019:2079 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2018-6506 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2018-14599)Record last updated .