Product by X.Org
libX11
19 known vulnerabilities in libX11 (X.Org), 0 of them actively exploited (CISA KEV).
Key figures
19
Vulnerabilities
0
Actively exploited (KEV)
0
Used by ransomware
5
Critical
Vulnerabilities
Actively exploited vulnerabilities (CISA KEV) first, then by priority. Click a column header to re-sort the table.
| Critical | CVE-2021-31535 | libX11: Code Execution | 9.8 | |
| Critical | CVE-2018-14600 | libX11: Out-of-Bounds Write | 9.8 | |
| Critical | CVE-2016-7942 | libX11: Out-of-Bounds Read | 9.8 | |
| Critical | CVE-2016-7943 | libX11: Out-of-Bounds Write | 9.8 | |
| Critical | CVE-2018-14599 | libX11: security vulnerability | 9.8 | |
| High | CVE-2018-14598 | libX11: security vulnerability | 7.5 | |
| High | CVE-2023-3138 | libX11: Improper Restriction of Operations within the Bounds of a Memory Buffer | 7.5 | |
| High | CVE-2026-88806 | libX11 XkbGetMap Reply Heap-based Buffer Overflow | 7.5 | |
| Not rated | CVE-2007-1667 | libX11: Buffer Overflow | — | |
| Not rated | CVE-2013-7439 | libX11: Buffer Overflow | — | |
| Medium | CVE-2026-94283 | Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser | 6.5 | |
| Medium | CVE-2023-43785 | Libx11: out-of-bounds memory access in _xkbreadkeysyms() | 6.5 | |
| High | CVE-2020-14363 | The X11 Project libX11: Use After Free | 7.8 | |
| Medium | CVE-2026-94284 | Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser | 5.5 | |
| High | CVE-2023-43787 | Libx11: integer overflow in xcreateimage() leading to a heap overflow | 7.8 | |
| Medium | CVE-2026-94285 | Out-of-bounds read in libX11's byte-oriented codeset parser | 5.1 | |
| Medium | CVE-2020-14344 | The X11 Project libX11: Integer Overflow or Wraparound | 6.7 | |
| Medium | CVE-2023-43786 | Libx11: stack exhaustion from infinite recursion in putsubimage() | 5.5 | |
| Not rated | CVE-2006-5397 | libX11: security vulnerability | — |