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CVE-2024-40901

scsi: mpt3sas: Avoid test/set_bit() operating in non-allocated memory

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]/

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 2 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2024-40901, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.31% · top 75% of all CVEs (12 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.3.

Affected products

  • Linux · Linux

    • affected c696f7b83edeac804e898952058089143f49ca0a – < e9bce7c751f6d6c7be88c0bc081a66aaf61a23ee
    • affected c696f7b83edeac804e898952058089143f49ca0a – < 19649e49a6df07cd2e03e0a11396fd3a99485ec2
    • affected c696f7b83edeac804e898952058089143f49ca0a – < 0081d2b3ae0a17a86b8cc0fa3c8bdc54e233ba16
    • affected c696f7b83edeac804e898952058089143f49ca0a – < 521f333e644c4246ca04a4fc4772edc53dd2a801
    • affected c696f7b83edeac804e898952058089143f49ca0a – < 46bab2bcd771e725ff5ca3a68ba68cfeac45676c
    • affected c696f7b83edeac804e898952058089143f49ca0a – < 9079338c5a0d1f1fee34fb1c9e99b754efe414c5
    • affected c696f7b83edeac804e898952058089143f49ca0a – < 18abb5db0aa9b2d48f7037a88b41af2eef821674
    • affected c696f7b83edeac804e898952058089143f49ca0a – < 4254dfeda82f20844299dca6c38cbffcfd499f41
  • Linux · Linux

    • affected 4.10
    • unaffected < 4.10
    • unaffected 4.19.317 – ≤ 4.19.*
    • unaffected 5.4.279 – ≤ 5.4.*
    • unaffected 5.10.221 – ≤ 5.10.*
    • unaffected 5.15.162 – ≤ 5.15.*
    • unaffected 6.1.95 – ≤ 6.1.*
    • unaffected 6.6.35 – ≤ 6.6.*
    • unaffected 6.9.6 – ≤ 6.9.*
    • unaffected 6.10 – ≤ *

References

References11

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .