CVE-2024-44968
Linux Kernel CPU Pointer Access Vulnerability
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.
INFO
Published Date :
Sept. 4, 2024, 7:15 p.m.
Last Modified :
Oct. 3, 2024, 6:04 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-44968.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-44968 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-44968 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Oct. 03, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/541a900d245536d4809cb1aa322c3fcc2cdb58a6 No Types Assigned https://git.kernel.org/stable/c/541a900d245536d4809cb1aa322c3fcc2cdb58a6 Patch Changed Reference Type https://git.kernel.org/stable/c/668c6c4a7e9e9f081c06b70f30104fb7013437ed No Types Assigned https://git.kernel.org/stable/c/668c6c4a7e9e9f081c06b70f30104fb7013437ed Patch Changed Reference Type https://git.kernel.org/stable/c/6881e75237a84093d0986f56223db3724619f26e No Types Assigned https://git.kernel.org/stable/c/6881e75237a84093d0986f56223db3724619f26e Patch Changed Reference Type https://git.kernel.org/stable/c/7b3ec186ba93e333e9efe7254e7e31c1828e5d2d No Types Assigned https://git.kernel.org/stable/c/7b3ec186ba93e333e9efe7254e7e31c1828e5d2d Patch Changed Reference Type https://git.kernel.org/stable/c/7dd12f85f150010ef7518201c63fa7e395f5c3e9 No Types Assigned https://git.kernel.org/stable/c/7dd12f85f150010ef7518201c63fa7e395f5c3e9 Patch Changed Reference Type https://git.kernel.org/stable/c/b9d604933d5fd72dd37f24e1dc35f778297d745a No Types Assigned https://git.kernel.org/stable/c/b9d604933d5fd72dd37f24e1dc35f778297d745a Patch Changed Reference Type https://git.kernel.org/stable/c/f54abf332a2bc0413cfa8bd6a8511f7aa99faea0 No Types Assigned https://git.kernel.org/stable/c/f54abf332a2bc0413cfa8bd6a8511f7aa99faea0 Patch Changed Reference Type https://git.kernel.org/stable/c/f91fb47ecacc178a83a77eeebd25cbaec18c01d6 No Types Assigned https://git.kernel.org/stable/c/f91fb47ecacc178a83a77eeebd25cbaec18c01d6 Patch Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.1.103 up to (excluding) 6.1.105 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6.44 up to (excluding) 6.6.46 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.10.3 up to (excluding) 6.10.5 *cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 04, 2024
Action Type Old Value New Value Added 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. Added Reference kernel.org https://git.kernel.org/stable/c/f54abf332a2bc0413cfa8bd6a8511f7aa99faea0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/f91fb47ecacc178a83a77eeebd25cbaec18c01d6 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/668c6c4a7e9e9f081c06b70f30104fb7013437ed [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/541a900d245536d4809cb1aa322c3fcc2cdb58a6 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7b3ec186ba93e333e9efe7254e7e31c1828e5d2d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b9d604933d5fd72dd37f24e1dc35f778297d745a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7dd12f85f150010ef7518201c63fa7e395f5c3e9 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6881e75237a84093d0986f56223db3724619f26e [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-44968 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-44968
weaknesses.