What’s Vulnerable › Vulnerabilities

CVE-2023-53357: md/raid10: check slab-out-of-bounds in md_bitmap_get_counter

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-17 · updated 2026-06-17
• Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid10: check slab-out-of-bounds in md_bitmap_get_counter If we write a large number to md/bitmap_set_bits, md_bitmap_checkpage() will return -EINVAL because 'page >= bitmap->pages', but the return value was not checked immediately in md_bitmap_get_counter() in order to set *blocks value and slab-out-of-bounds occurs. Move check of 'page >= bitmap->pages' to md_bitmap_get_counter() and return directly if true.

Affected products

• Linux kernel: from 2.6.36 before 4.19.291; from 4.20 before 5.4.251; from 5.5 before 5.10.188; from 5.11 before 5.15.121; from 5.16 before 6.1.39; from 6.2 before 6.3.13 — fixed in 4.19.291, 5.10.188, 5.15.121, 5.4.251, 6.1.39, 6.3.13

How to fix

Upgrade to a fixed version: Linux kernel 4.19.291, 5.10.188, 5.15.121, 5.4.251. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/152bb26796ff054af50b2ee1b3ca56e364e4f61b
• https://git.kernel.org/stable/c/301867b1c16805aebbc306aafa6ecdc68b73c7e5
• https://git.kernel.org/stable/c/374fb914304d9b500721007f3837ea8f1f9a2418
• https://git.kernel.org/stable/c/39fa14e824acfd470db4f42c354297456bd82b53
• https://git.kernel.org/stable/c/a134dd582c0d5b6068efa308bd485cf1d00b3f65
• https://git.kernel.org/stable/c/b0b971fe7d61411ede63c3291764dbde1577ef2c
• https://git.kernel.org/stable/c/be1a3ec63a840cc9e59a033acf154f56255699a1
• https://git.kernel.org/stable/c/bea301c046110bf421a3ce153fb868cb8d618e90

Get alerted when CVE-2023-53357 or the next vulnerability affects your stack