SB20250317110 - Red Hat Enterprise Linux 9 update for tigervnc
Published: March 17, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2025-26594)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error of the root cursor. A local user can execute arbitrary code with elevated privileges.
2) Use-after-free (CVE-ID: CVE-2025-26601)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the SyncInitTrigger() function. A local user can execute arbitrary code with elevated privileges.
3) Use-after-free (CVE-ID: CVE-2025-26600)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the PlayReleasedEvents() function. A local user can execute arbitrary code with elevated privileges.
4) Access of uninitialized pointer (CVE-ID: CVE-2025-26599)
CWE-ID: CWE-824 - Access of Uninitialized Pointer
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to usage of an uninitialized pointer within the compRedirectWindow() function. A local user can execute arbitrary code with elevated privileges.
5) Out-of-bounds write (CVE-ID: CVE-2025-26598)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the CreatePointerBarrierClient() function. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
6) Buffer overflow (CVE-ID: CVE-2025-26597)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the XkbChangeTypesOfKey() function. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.
7) Heap-based buffer overflow (CVE-ID: CVE-2025-26596)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the XkbWriteKeySyms() function. A local user can trigger a heap-based buffer overflow and execute arbitrary code with elevated privileges.
8) Buffer overflow (CVE-ID: CVE-2025-26595)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the XkbVModMaskText() function. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.