SB2025072753 - Improper locking in Linux kernel gpu drm driver

Description

This security bulletin contains information about 1 security vulnerability.

1) Improper locking (CVE-ID: CVE-2025-38449)

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

The vulnerability exists due to improper locking within the drm_gem_fb_destroy() and drm_gem_fb_init_with_funcs() functions in drivers/gpu/drm/drm_gem_framebuffer_helper.c, within the drm_gem_private_object_fini(), drm_gem_object_exported_dma_buf_free(), drm_gem_object_handle_put_unlocked() and drm_gem_handle_create_tail() functions in drivers/gpu/drm/drm_gem.c. A local user can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/08480e285c6a82ce689008d643e4a51db0aaef8b
• https://git.kernel.org/stable/c/3cf520d9860d4ec9f7f32068825da31f18dd3f25
• https://git.kernel.org/stable/c/5307dce878d4126e1b375587318955bd019c3741
• https://git.kernel.org/stable/c/cb4c956a15f8b7f870649454771fc3761f504b5f