CVE-2024-47809

Updated: 2025-02-04 16:45:14.158057

Description:

In the Linux kernel, the following vulnerability has been resolved: dlm: fix possible lkb_resource null dereference This patch fixes a possible null pointer dereference when this function is called from request_lock() as lkb->lkb_resource is not assigned yet, only after validate_lock_args() by calling attach_lkb(). Another issue is that a resource name could be a non printable bytearray and we cannot assume to be ASCII coded. The log functionality is probably never being hit when DLM is used in normal way and no debug logging is enabled. The null pointer dereference can only occur on a new created lkb that does not have the resource assigned yet, it probably never hits the null pointer dereference but we should be sure that other changes might not change this behaviour and we actually can hit the mentioned null pointer dereference. In this patch we just drop the printout of the resource name, the lkb id is enough to make a possible connection to a resource name if this exists.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x 0
CVSS Version 3.x MEDIUM 5.5

Status

OS name Project name Version Score Severity Status Errata Last updated

Statement

AlmaLinux 9.2 ESU kernel 5.14.0 5.5 MEDIUM Ignored 2025-02-07 06:31:32
AlmaLinux 9.2 FIPS kernel 5.14.0 5.5 MEDIUM Ignored 2025-02-07 06:31:32
CentOS 6 ELS kernel 2.6.32 5.5 MEDIUM Ignored 2025-02-07 06:31:32
CentOS 7 ELS kernel 3.10.0 5.5 MEDIUM Ignored 2025-02-07 06:31:31
CentOS 8.4 ELS kernel 4.18.0 5.5 MEDIUM Ignored 2025-02-07 06:31:31
CentOS 8.5 ELS kernel 4.18.0 5.5 MEDIUM Ignored 2025-02-07 06:31:32
CentOS Stream 8 ELS kernel 4.18.0 5.5 MEDIUM Ignored 2025-02-07 06:31:31
CloudLinux 6 ELS kernel 2.6.32 5.5 MEDIUM Ignored 2025-02-07 06:31:32
CloudLinux 7 ELS kernel 3.10.0 5.5 MEDIUM Ignored 2025-02-07 06:31:31
Oracle Linux 6 ELS kernel 2.6.32 5.5 MEDIUM Ignored 2025-02-07 06:31:31
Total: 14