In the Linux kernel, the following vulnerability has been resolved:
md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()
r5l_flush_stripe_to_raid() will check if the list 'flushing_ios' is
empty, and then submit 'flush_bio', however, r5l_log_flush_endio()
is clearing the list first and then clear the bio, which will cause
null-ptr-deref:
T1: submit flush io
raid5d
handle_active_stripes
r5l_flush_stripe_to_raid
// list is empty
// add 'io_end_ios' to the list
bio_init
submit_bio
// io1
T2: io1 is done
r5l_log_flush_endio
list_splice_tail_init
// clear the list
T3: submit new flush io
...
r5l_flush_stripe_to_raid
// list is empty
// add 'io_end_ios' to the list
bio_init
bio_uninit
// clear bio->bi_blkg
submit_bio
// null-ptr-deref
Fix this problem by clearing bio before clearing the list in
r5l_log_flush_endio().
References
Configurations
Configuration 1 (hide)
|
History
04 Dec 2025, 15:01
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0d0bd28c500173bfca78aa840f8f36d261ef1765 - Patch | |
| References | () https://git.kernel.org/stable/c/711fb92606208a8626b785da4f9f23d648a5b6c8 - Patch | |
| References | () https://git.kernel.org/stable/c/7a8b6d93991bf4b72b3f959baea35397c6c8e521 - Patch | |
| References | () https://git.kernel.org/stable/c/e46b2e7be8059d156af8c011dd8d665229b65886 - Patch | |
| CWE | CWE-476 | |
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
15 Sep 2025, 15:22
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-15 15:15
Updated : 2025-12-04 15:01
NVD link : CVE-2023-53210
Mitre link : CVE-2023-53210
CVE.ORG link : CVE-2023-53210
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference