CVE-2024-40901

medium

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]/

References

https://git.kernel.org/stable/c/e9bce7c751f6d6c7be88c0bc081a66aaf61a23ee

https://git.kernel.org/stable/c/9079338c5a0d1f1fee34fb1c9e99b754efe414c5

https://git.kernel.org/stable/c/521f333e644c4246ca04a4fc4772edc53dd2a801

https://git.kernel.org/stable/c/46bab2bcd771e725ff5ca3a68ba68cfeac45676c

https://git.kernel.org/stable/c/4254dfeda82f20844299dca6c38cbffcfd499f41

https://git.kernel.org/stable/c/19649e49a6df07cd2e03e0a11396fd3a99485ec2

https://git.kernel.org/stable/c/18abb5db0aa9b2d48f7037a88b41af2eef821674

https://git.kernel.org/stable/c/0081d2b3ae0a17a86b8cc0fa3c8bdc54e233ba16

Details

Source: Mitre, NVD

Published: 2024-07-12

Updated: 2024-07-12

Risk Information

CVSS v2

Base Score: 5.7

Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:C/A:P

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium