CVE-2024-40901

HIGH
Published Jul 12, 2024 Modified Nov 3, 2025 CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: mpt3sas: Avoid test/set_bit() operating in non-allocated memory There is a potential out-of-bounds access when using test_bit() on a single word. The test_bit() and set_bit() functions operate on long values, and when testing or setting a single word, they can exceed the word boundary. KASAN detects this issue and produces a dump: BUG: KASAN: slab-out-of-bounds in _scsih_add_device.constprop.0 (./arch/x86/include/asm/bitops.h:60 ./include/asm-generic/bitops/instrumented-atomic.h:29 drivers/scsi/mpt3sas/mpt3sas_scsih.c:7331) mpt3sas Write of size 8 at addr ffff8881d26e3c60 by task kworker/u1536:2/2965 For full log, please look at [1]. Make the allocation at least the size of sizeof(unsigned long) so that set_bit() and test_bit() have sufficient room for read/write operations without overwriting unallocated memory. [1] Link: https://lore.kernel.org/all/[email protected]/

Is your site exposed to CVE-2024-40901?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/0081d2b3ae0a17a86b8cc0fa3c8bdc54e233ba16 https://git.kernel.org/stable/c/18abb5db0aa9b2d48f7037a88b41af2eef821674 https://git.kernel.org/stable/c/19649e49a6df07cd2e03e0a11396fd3a99485ec2 https://git.kernel.org/stable/c/4254dfeda82f20844299dca6c38cbffcfd499f41 https://git.kernel.org/stable/c/46bab2bcd771e725ff5ca3a68ba68cfeac45676c https://git.kernel.org/stable/c/521f333e644c4246ca04a4fc4772edc53dd2a801 https://git.kernel.org/stable/c/9079338c5a0d1f1fee34fb1c9e99b754efe414c5 https://git.kernel.org/stable/c/e9bce7c751f6d6c7be88c0bc081a66aaf61a23ee https://git.kernel.org/stable/c/0081d2b3ae0a17a86b8cc0fa3c8bdc54e233ba16 https://git.kernel.org/stable/c/18abb5db0aa9b2d48f7037a88b41af2eef821674 https://git.kernel.org/stable/c/19649e49a6df07cd2e03e0a11396fd3a99485ec2 https://git.kernel.org/stable/c/4254dfeda82f20844299dca6c38cbffcfd499f41 https://git.kernel.org/stable/c/46bab2bcd771e725ff5ca3a68ba68cfeac45676c https://git.kernel.org/stable/c/521f333e644c4246ca04a4fc4772edc53dd2a801 https://git.kernel.org/stable/c/9079338c5a0d1f1fee34fb1c9e99b754efe414c5 https://git.kernel.org/stable/c/e9bce7c751f6d6c7be88c0bc081a66aaf61a23ee

Frequently Asked Questions

What is CVE-2024-40901? +
In the Linux kernel, the following vulnerability has been resolved: scsi: mpt3sas: Avoid test/set_bit() operating in non-allocated memory There is a potential out-of-bounds access when using test_bit() on a single word. The test_bit() and set_bit() functions operate on long values, and when testing or setting a single word, they can exceed the word boundary. KASAN detects this issue and produces a dump: BUG: KASAN: slab-out-of-bounds in _scsih_add_device.constprop.0 (./arch/x86/include/asm/bitops.h:60 ./include/asm-generic/bitops/instrumented-atomic.h:29 drivers/scsi/mpt3sas/mpt3sas_scsih.c:7331) mpt3sas Write of size 8 at addr ffff8881d26e3c60 by task kworker/u1536:2/2965 For full log, please look at [1]. Make the allocation at least the size of sizeof(unsigned long) so that set_bit() and test_bit() have sufficient room for read/write operations without overwriting unallocated memory. [1] Link: https://lore.kernel.org/all/[email protected]/ It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2024-40901? +
CVE-2024-40901 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-40901? +
CVE-2024-40901 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-40901? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-8358

LibreOffice Calc can import tracked changes from a spreadsheet document. A heap buffer overflow existed when a document reused the …
CVE-2026-8356

LibreOffice can import presentations in the legacy binary PPT format. A stack buffer overflow existed when importing a colour-replacement record. …
CVE-2026-6040

A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the …
CVE-2026-6039

LibreOffice can import drawings in the DXF format used by CAD software. A heap buffer overflow existed when importing a …
CVE-2026-3298

The method "sock_recvfrom_into()" of "asyncio.ProacterEventLoop" (Windows only) was missing a boundary check for the data buffer when using nbytes parameter. …
CVE-2026-40489

editorconfig-core-c is an EditorConfig core library for use by plugins supporting EditorConfig parsing. Versions up to and including 0.12.10 have …

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2024-40901 — free, no signup required.