CVE-2019-17624
"" In X.Org X Server 1.20.4, there is a stack-based buffer overflow in the function XQueryKeymap.
Does this matter?
A public exploit is published in Exploit-DB and the impact is high, while EPSS rates exploitation at 3.7%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
Description
"" In X.Org X Server 1.20.4, there is a stack-based buffer overflow in the function XQueryKeymap. For example, by sending ct.c_char 1000 times, an attacker can cause a denial of service (application crash) or possibly have unspecified other impact. Note: It is disputed if the X.Org X Server is involved or if there is a stack overflow.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.69% probability · 90th percentile
- Public exploits
- 1 in Exploit-DB · first 16 October 2019
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- x.org/x server
- Source
- cve@mitre.org
EPSS 3.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/154868/X.Org-X-Server-1.20.4-Local-Stack-Overflow.htmlThird Party Advisory
- https://www.exploit-db.com/exploits/47507Exploit, Third Party Advisory, VDB Entry
- https://www.x.org/releases/individual/xserver/Release Notes, Vendor Advisory
- http://packetstormsecurity.com/files/154868/X.Org-X-Server-1.20.4-Local-Stack-Overflow.htmlThird Party Advisory
- https://www.exploit-db.com/exploits/47507Exploit, Third Party Advisory, VDB Entry
- https://www.x.org/releases/individual/xserver/Release Notes, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.