SB20261103106 - Ubuntu update for linux

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Main Vulnerability Database SB20261103106

SB20261103106 - Ubuntu update for linux

Published: November 3, 2026

Security Bulletin ID SB20261103106
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2021-3640)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in sco_sock_sendmsg() function of the Linux kernel HCI subsystem. A privileged local user can call ioct UFFDIO_REGISTER or other way trigger race condition to escalate privileges on the system.


2) Buffer overflow (CVE-ID: CVE-2022-49058)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 8.5 [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]


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to memory corruption within the parse_mf_symlink() function in fs/cifs/link.c. A local user can escalate privileges on the system.


Remediation

Install update from vendor's website.

References