CVE-2026-31650
mmc: vub300: fix use-after-free on disconnect
Severity Score
7.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
In the Linux kernel, the following vulnerability has been resolved: mmc: vub300: fix use-after-free on disconnect The vub300 driver maintains an explicit reference count for the
controller and its driver data and the last reference can in theory be
dropped after the driver has been unbound. This specifically means that the controller allocation must not be
device managed as that can lead to use-after-free. Note that the lifetime is currently also incorrectly tied the parent USB
device rather than interface, which can lead to memory leaks if the
driver is unbound without its device being physically disconnected (e.g.
on probe deferral). Fix both issues by reverting to non-managed allocation of the controller.
*Credits:
N/A
CVSS Scores
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Scope
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* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2026-03-09 CVE Reserved
- 2026-04-24 CVE Published
- 2026-04-27 CVE Updated
- 2026-04-28 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-416: Use After Free
CAPEC
References (4)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/dcfdd698dc521c6046e9b80c16281575efb25d23 | 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" | >= 6.17 < 6.18.23 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.17 < 6.18.23" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.17 < 6.19.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.17 < 6.19.13" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.17 < 7.0 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.17 < 7.0" | en |
Affected
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