CVE-2024-44968

Oct. 3, 2024, 6:04 p.m.

5.5
Medium

Description

In the Linux kernel, the following vulnerability has been resolved: tick/broadcast: Move per CPU pointer access into the atomic section The recent fix for making the take over of the broadcast timer more reliable retrieves a per CPU pointer in preemptible context. This went unnoticed as compilers hoist the access into the non-preemptible region where the pointer is actually used. But of course it's valid that the compiler keeps it at the place where the code puts it which rightfully triggers: BUG: using smp_processor_id() in preemptible [00000000] code: caller is hotplug_cpu__broadcast_tick_pull+0x1c/0xc0 Move it to the actual usage site which is in a non-preemptible region.

Product(s) Impacted

Vendor Product Versions
Linux
  • Linux Kernel
  • *, 6.11

Weaknesses

Common security weaknesses mapped to this vulnerability.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
o linux linux_kernel / / / / / / / /
o linux linux_kernel / / / / / / / /
o linux linux_kernel / / / / / / / /
o linux linux_kernel 6.11 rc1 / / / / / /

References

https://git.kernel.org/stable/c/541a900d245536d4809cb1aa322c3fcc2cdb58a6
https://git.kernel.org/stable/c/668c6c4a7e9e9f081c06b70f30104fb7013437ed
https://git.kernel.org/stable/c/6881e75237a84093d0986f56223db3724619f26e
https://git.kernel.org/stable/c/7b3ec186ba93e333e9efe7254e7e31c1828e5d2d
https://git.kernel.org/stable/c/7dd12f85f150010ef7518201c63fa7e395f5c3e9
https://git.kernel.org/stable/c/b9d604933d5fd72dd37f24e1dc35f778297d745a
https://git.kernel.org/stable/c/f54abf332a2bc0413cfa8bd6a8511f7aa99faea0
https://git.kernel.org/stable/c/f91fb47ecacc178a83a77eeebd25cbaec18c01d6

Tags

416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD-CWE-noinfo
2024-09-04
CVE-2024-44968

CVSS Score

5.5 / 10

CVSS Data

  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Privileges Required: LOW
  • Scope: UNCHANGED
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: HIGH
    • View Vector String

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

Date

  • Published: Sept. 4, 2024, 7:15 p.m.
  • Last Modified: Oct. 3, 2024, 6:04 p.m.

Status : Analyzed

CVE has had analysis completed and all data associations made.

More info

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.