CVE-2023-53210

MEDIUM EPSS 4.2%
Published Sep 15, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

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().

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥5.18  –  <6.1.53
linuxlinux_kernel*≥6.2  –  <6.4.16
linuxlinux_kernel*≥6.5  –  <6.5.3

References 4

  • git.kernel.org https://git.kernel.org/stable/c/0d0bd28c500173bfca78aa840f8f36d261ef1765
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/711fb92606208a8626b785da4f9f23d648a5b6c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7a8b6d93991bf4b72b3f959baea35397c6c8e521
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e46b2e7be8059d156af8c011dd8d665229b65886
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0d0bd28c500173bfca78aa840f8f36d261ef1765
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/711fb92606208a8626b785da4f9f23d648a5b6c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7a8b6d93991bf4b72b3f959baea35397c6c8e521
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e46b2e7be8059d156af8c011dd8d665229b65886
    Patch