CVE-2026-31720
usb: gadget: f_uac1_legacy: validate control request size
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: usb: gadget: f_uac1_legacy: validate control request size f_audio_complete() copies req->length bytes into a 4-byte stack
variable: u32 data = 0; memcpy(&data, req->buf, req->length); req->length is derived from the host-controlled USB request path,
which can lead to a stack out-of-bounds write. Validate req->actual against the expected payload size for the
supported control selectors and decode only the expected amount
of data. This avoids copying a host-influenced length into a fixed-size
stack object.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2026-03-09 CVE Reserved
- 2026-05-01 CVE Published
- 2026-05-07 EPSS Updated
- 2026-05-11 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-787: Out-of-bounds Write
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/c6994e6f067cf0fc4c6cca3d164018b1150916f8 | 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" | >= 2.6.31 < 5.10.253 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.31 < 5.10.253" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.31 < 5.15.203 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.31 < 5.15.203" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.31 < 6.1.168 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.31 < 6.1.168" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.31 < 6.6.134 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.31 < 6.6.134" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.31 < 6.12.81 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.31 < 6.12.81" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.31 < 6.18.22 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.31 < 6.18.22" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.31 < 6.19.12 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.31 < 6.19.12" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.31 < 7.0 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.31 < 7.0" | en |
Affected
| ||||||