SB2025051907 - Red Hat Enterprise Linux 9 update for kernel

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Main Vulnerability Database SB2025051907

SB2025051907 - Red Hat Enterprise Linux 9 update for kernel

Published: May 19, 2025 Updated: July 3, 2025

Security Bulletin ID SB2025051907
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2025-21756)

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:P/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 EXPORT_SYMBOL_GPL() and __vsock_release() functions in net/vmw_vsock/af_vsock.c. A local user can escalate privileges on the system.


2) Buffer overflow (CVE-ID: CVE-2025-21966)

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 memory corruption within the clone_bio() function in drivers/md/dm-flakey.c. A local user can escalate privileges on the system.


3) Out-of-bounds read (CVE-ID: CVE-2025-37749)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the ppp_sync_txmunge() function in drivers/net/ppp/ppp_synctty.c. A local user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References