tigervnc 関連製品全体の CVE とセキュリティ脆弱性情報を集約し、CVSS、EPSS、公開日、脆弱性情報データを掲載しています。
一般的な弱点パターンには vendor risk memory corruption、バッファオーバーフロー, and vendor risk input validation があり、vendor surface production workloads and vendor surface software deployment の利用場面で vendor impact memory corruption、アプリケーションクラッシュ, and vendor impact unexpected behavior などのリスクが生じる可能性があります。
掲載データは公開脆弱性情報とセキュリティ公告に基づき、過去の暴露面と修補優先度の評価に利用できます。
| CVE | 概要 | ソース | CVSS 最大値 | EPSS（%） | 公開 | 更新 |
|---|---|---|---|---|---|---|
| CVE-2026-34352 | In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions. | [email protected] | 8.5 | 0.25% | 2026-03-26 | 2026-06-04 |
| CVE-2025-26601 | A use-after-free flaw was found in X.Org and Xwayland. When changing an alarm, the values of the change mask are evaluated one after the other, changing the trigger values as requested, and eventually, SyncInitTrigger() is called. If one of the changes triggers an error, the function will return early, not adding the new sync object, possibly causing a use-after-free when the alarm eventually triggers. | [email protected] | 7.8 | 0.35% | 2025-02-25 | 2026-04-06 |
| CVE-2025-26600 | A use-after-free flaw was found in X.Org and Xwayland. When a device is removed while still frozen, the events queued for that device remain while the device is freed. Replaying the events will cause a use-after-free. | [email protected] | 7.8 | 0.35% | 2025-02-25 | 2026-04-06 |
| CVE-2025-26599 | An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the validated data partly initialized and the use of an uninitialized pointer later. | [email protected] | 7.8 | 0.36% | 2025-02-25 | 2026-04-06 |
| CVE-2025-26598 | An out-of-bounds write flaw was found in X.Org and Xwayland. The function GetBarrierDevice() searches for the pointer device based on its device ID and returns the matching value, or supposedly NULL, if no match was found. However, the code will return the last element of the list if no matching device ID is found, which can lead to out-of-bounds memory access. | [email protected] | 7.8 | 0.36% | 2025-02-25 | 2026-04-06 |
| CVE-2025-26597 | A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size. | [email protected] | 7.8 | 0.47% | 2025-02-25 | 2026-06-02 |
| CVE-2025-26596 | A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow. | [email protected] | 7.8 | 0.39% | 2025-02-25 | 2026-04-06 |
| CVE-2025-26595 | A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size. | [email protected] | 7.8 | 0.39% | 2025-02-25 | 2026-04-06 |
| CVE-2025-26594 | A use-after-free flaw was found in X.Org and Xwayland. The root cursor is referenced in the X server as a global variable. If a client frees the root cursor, the internal reference points to freed memory and causes a use-after-free. | [email protected] | 7.8 | 0.35% | 2025-02-25 | 2026-04-06 |
| CVE-2024-0409 | A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of private at creation. It uses the cursor bits type with the cursor as private, and when initiating the cursor, that overwrites the XSELINUX context. | [email protected] | 7.8 | 0.36% | 2024-01-18 | 2025-08-29 |
| CVE-2024-0408 | A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL. | [email protected] | 5.5 | 0.32% | 2024-01-18 | 2025-08-29 |
| CVE-2023-6478 | A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive information. | [email protected] | 7.6 | 1.63% | 2023-12-13 | 2025-08-04 |
| CVE-2023-6377 | A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code execution in cases where X11 forwarding is involved. | [email protected] | 7.8 | 1.59% | 2023-12-13 | 2026-03-24 |
| CVE-2020-26117 | In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception. | [email protected] | 8.1 | 3.02% | 2020-09-27 | 2024-11-21 |
| CVE-2014-0011 | Multiple heap-based buffer overflows in the ZRLE_DECODE function in common/rfb/zrleDecode.h in TigerVNC before 1.3.1, when NDEBUG is enabled, allow remote VNC servers to cause a denial of service (vncviewer crash) and possibly execute arbitrary code via vectors related to screen image rendering. | [email protected] | 9.8 | 2.49% | 2020-01-02 | 2024-11-21 |
| CVE-2019-15695 | TigerVNC version prior to 1.10.1 is vulnerable to stack buffer overflow, which could be triggered from CMsgReader::readSetCursor. This vulnerability occurs due to insufficient sanitization of PixelFormat. Since remote attacker can choose offset from start of the buffer to start writing his values, exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity. | [email protected] | 7.2 | 4.49% | 2019-12-26 | 2024-11-21 |
| CVE-2019-15694 | TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which could be triggered from DecodeManager::decodeRect. Vulnerability occurs due to the signdness error in processing MemOutStream. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity. | [email protected] | 7.2 | 4.49% | 2019-12-26 | 2024-11-21 |
| CVE-2019-15693 | TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which occurs in TightDecoder::FilterGradient. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity. | [email protected] | 7.2 | 4.28% | 2019-12-26 | 2024-11-21 |
| CVE-2019-15692 | TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow. Vulnerability could be triggered from CopyRectDecoder due to incorrect value checks. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity. | [email protected] | 7.2 | 4.77% | 2019-12-26 | 2024-11-21 |
| CVE-2019-15691 | TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity. | [email protected] | 7.2 | 4.72% | 2019-12-26 | 2024-11-21 |