CVE-2024-40901

Summary

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/ZkNcALr3W3KGYYJG@gmail.com/

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc696f7b83edeac804e898952058089143f49ca0a < e9bce7c751f6d6c7be88c0bc081a66aaf61a23eeaffected
LinuxLinuxc696f7b83edeac804e898952058089143f49ca0a < 19649e49a6df07cd2e03e0a11396fd3a99485ec2affected
LinuxLinuxc696f7b83edeac804e898952058089143f49ca0a < 0081d2b3ae0a17a86b8cc0fa3c8bdc54e233ba16affected
LinuxLinuxc696f7b83edeac804e898952058089143f49ca0a < 521f333e644c4246ca04a4fc4772edc53dd2a801affected
LinuxLinuxc696f7b83edeac804e898952058089143f49ca0a < 46bab2bcd771e725ff5ca3a68ba68cfeac45676caffected
LinuxLinuxc696f7b83edeac804e898952058089143f49ca0a < 9079338c5a0d1f1fee34fb1c9e99b754efe414c5affected
LinuxLinuxc696f7b83edeac804e898952058089143f49ca0a < 18abb5db0aa9b2d48f7037a88b41af2eef821674affected
LinuxLinuxc696f7b83edeac804e898952058089143f49ca0a < 4254dfeda82f20844299dca6c38cbffcfd499f41affected
LinuxLinux4.10affected
LinuxLinux0 < 4.10unaffected
LinuxLinux4.19.317 <= 4.19.*unaffected
LinuxLinux5.4.279 <= 5.4.*unaffected
LinuxLinux5.10.221 <= 5.10.*unaffected
LinuxLinux5.15.162 <= 5.15.*unaffected
LinuxLinux6.1.95 <= 6.1.*unaffected
LinuxLinux6.6.35 <= 6.6.*unaffected
LinuxLinux6.9.6 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References