Answer in brief
CVE-2022-49755 records a High severity (CVSS 7.8) vulnerability in usb: gadget: f_fs: Prevent race during ffs_ep0_queue_wait. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ddf8abd2599491cbad959c700b90ba72a5dce8d0 <facf353c9e8d7885b686d9a4b173d4e0af6441d2 || >=ddf8abd2599491cbad959c700b90ba72a5dce8d0 <e9036e951f93fb8d7b5e9d6e2c7f94a4da312ae4 || >=ddf8abd2599491cbad959c700b90ba72a5dce8d0 <a8d40942df074f4ebcb9bd3413596d92f323b064 || >=ddf8abd2599491cbad959c700b90ba72a5dce8d0 <6dd9ea05534f323668db94fcc2726c7a84547e78 || >=ddf8abd2599491cbad959c700b90ba72a5dce8d0 <ae8e136bcaae96163b5821984de1036efc9abb1a || >=ddf8abd2599491cbad959c700b90ba72a5dce8d0 <6aee197b7fbcd61596a78b47d553f2f99111f217 || >=ddf8abd2599491cbad959c700b90ba72a5dce8d0 <6a19da111057f69214b97c62fb0ac59023970850 | facf353c9e8d7885b686d9a4b173d4e0af6441d2, e9036e951f93fb8d7b5e9d6e2c7f94a4da312ae4, a8d40942df074f4ebcb9bd3413596d92f323b064, 6dd9ea05534f323668db94fcc2726c7a84547e78, ae8e136bcaae96163b5821984de1036efc9abb1a, 6aee197b7fbcd61596a78b47d553f2f99111f217, 6a19da111057f69214b97c62fb0ac59023970850 |
| Linux/Linuxgeneric | 2.6.35 | Not reported |
Published upstream
Mar 27, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Prevent race during ffs_ep0_queue_wait While performing fast composition switch, there is a possibility that the process of ffs_ep0_write/ffs_ep0_read get into a race condition due to ep0req being freed up from functionfs_unbind. Consider the scenario that the ffs_ep0_write calls the ffs_ep0_queue_wait by taking a lock &ffs->ev.waitq.lock. However, the functionfs_unbind isn't bounded so it can go ahead and mark the ep0req to NULL, and since there is no NULL check in ffs_ep0_queue_wait we will end up in use-after-free. Fix this by making a serialized execution between the two functions using a mutex_lock(ffs->mutex).
Quoted source text, attributed separately from HOL analysis.