CVE-2021-47357
atm: iphase: fix possible use-after-free in ia_module_exit()
Using Linux by Linux?
Get instant alerts when new vulnerabilities affect Linux - before attackers find them.
Description
In the Linux kernel, the following vulnerability has been resolved: atm: iphase: fix possible use-after-free in ia_module_exit() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f
- https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417
- https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479
- https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42
- https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8
References (9)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Quick Info
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.