CVE-2024-44968
tick/broadcast: Move per CPU pointer access into the atomic section
Severity Score
"-"
*CVSS v-
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track
*SSVC
Descriptions
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.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2024-08-21 CVE Reserved
- 2024-09-04 CVE Published
- 2024-09-05 EPSS Updated
- 2024-09-15 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (11)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/408bfb6b0a7f22e971ce6b600aec448769e580a8 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/3a58c590f6bd1d20eb1e76c5cea31c36cc032339 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/2cdab4b4bf77369961f706cdeb7d040db10c5217 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.1.103 < 6.1.105 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1.103 < 6.1.105" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.6.44 < 6.6.46 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6.44 < 6.6.46" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.10.3 < 6.10.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.10.3 < 6.10.5" | en |
Affected
| ||||||