SB2025080463 - Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION update for tigervnc
Published: August 4, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 18 secuirty vulnerabilities.
1) Stack-based buffer overflow (CVE-ID: CVE-2022-46340)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the swap handler for the XTestFakeInput request of the XTest extension if GenericEvents with lengths larger than 32 bytes are sent through a the XTestFakeInput request. A local user can trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.
2) Out-of-bounds read (CVE-ID: CVE-2022-46341)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when handling XIPassiveUngrab requests. A local user can trigger an out-of-bounds read error and read contents of memory on the system.
3) Use-after-free (CVE-ID: CVE-2022-46342)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error when handling XvdiSelectVideoNotify requests. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
4) Use-after-free (CVE-ID: CVE-2022-46343)
The vulnerability allows a local user to escalate privileges on the system.
The
vulnerability exists due to a use-after-free error when handling
ScreenSaverSetAttributes requests. A local user can trigger a
use-after-free error and execute arbitrary code with elevated
privileges.
5) Out-of-bounds read (CVE-ID: CVE-2022-46344)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when handling XIChangeProperty requests. A local user can trigger an out-of-bounds read error and read contents of memory on the system.
6) Use-after-free (CVE-ID: CVE-2022-4283)
The vulnerability allows a local user to escalate privileges on the system.
7) Use-after-free (CVE-ID: CVE-2023-0494)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within DeepCopyPointerClasses. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
8) Use-after-free (CVE-ID: CVE-2023-1393)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error when processing deletion of a compositor overlay window. A local user can trigger a use-after-free error and execute arbitrary code on the system.
9) Out-of-bounds write (CVE-ID: CVE-2023-5367)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in IChangeDeviceProperty/RRChangeOutputProperty. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
10) Integer overflow (CVE-ID: CVE-2023-6478)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to integer overflow when handling RRChangeProviderProperty or RRChangeOutputProperty requests. A local user can send a specially crafted request to the server, trigger an integer overflow and gain access to sensitive information.
11) Heap-based buffer overflow (CVE-ID: CVE-2024-21885)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the XISendDeviceHierarchyEvent() function. A local user can trigger a heap-based buffer overflow and execute arbitrary code on the target system.
12) Heap-based buffer overflow (CVE-ID: CVE-2024-21886)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the DisableDevice() function. A local user can trigger a heap-based buffer overflow and execute arbitrary code on the target system.
13) Race condition (CVE-ID: CVE-2024-0229)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition when reattaching to a different master device. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
14) Heap-based buffer overflow (CVE-ID: CVE-2023-6816)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the DeviceFocusEvent and ProcXIQueryPointer functions. A local user can trigger a heap-based buffer overflow and execute arbitrary code on the target system.
15) Heap-based buffer overflow (CVE-ID: CVE-2024-31080)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a boundary error within the ProcXIGetSelectedEvents() function. A local user can trigger a heap-based buffer overflow and read system memory.
16) Heap-based buffer overflow (CVE-ID: CVE-2024-31081)
The vulnerability allows a local user to gain access to sensitive information.
17) Use-after-free (CVE-ID: CVE-2024-31083)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ProcRenderAddGlyphs() function. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
18) Heap-based buffer overflow (CVE-ID: CVE-2024-9632)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the XkbSetCompatMap() function in xkb/xkb.c. A local user can pass a specially crafted bitmap to the X.Org server, trigger a heap-based buffer overflow and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.