Answer in brief
CVE-2026-74456 records a High severity (CVSS 7.8) vulnerability in can: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <525640b93d3e5f82f4ebea4730f4e0cf799522ba || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <4bb3325075138dd5346b71589a959878b564dc0b || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <92d0de80ca2223b9c7da78020155b6cb27824cc0 || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <dfb17bf04a764462000f11258a7c06aa92d1f261 || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9 | 525640b93d3e5f82f4ebea4730f4e0cf799522ba, 4bb3325075138dd5346b71589a959878b564dc0b, 92d0de80ca2223b9c7da78020155b6cb27824cc0, dfb17bf04a764462000f11258a7c06aa92d1f261, 9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9 |
| Linux/Linuxgeneric | 3.4 | Not reported |
| Linux/Linuxgeneric | >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <914c3b8fa175acf8476ad31cf04e308638e3578e || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <5f2fa5840c34d3a558c57855781be75e03bef752 || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <b9088d581fff971a7eb1628f8dcc30df6cfef4dc || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <525640b93d3e5f82f4ebea4730f4e0cf799522ba || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <4bb3325075138dd5346b71589a959878b564dc0b || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <92d0de80ca2223b9c7da78020155b6cb27824cc0 || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <dfb17bf04a764462000f11258a7c06aa92d1f261 || >=bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d <9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9 | 914c3b8fa175acf8476ad31cf04e308638e3578e, 5f2fa5840c34d3a558c57855781be75e03bef752, b9088d581fff971a7eb1628f8dcc30df6cfef4dc, 525640b93d3e5f82f4ebea4730f4e0cf799522ba, 4bb3325075138dd5346b71589a959878b564dc0b, 92d0de80ca2223b9c7da78020155b6cb27824cc0, dfb17bf04a764462000f11258a7c06aa92d1f261, 9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error In peak_usb_start(), each RX URB transfer buffer is allocated with kmalloc() and the URB is flagged URB_FREE_BUFFER so that the final usb_free_urb() also frees the transfer buffer. If usb_submit_urb() fails, the error path frees the buffer explicitly with kfree(buf) and then calls usb_free_urb(urb). Because URB_FREE_BUFFER is set, usb_free_urb() -> urb_destroy() frees the same buffer a second time, a double free of the transfer buffer. BUG: KASAN: double-free in usb_free_urb.part.0+0x91/0xb0 Free of addr ffff8881069ccb80 by task trigger.sh/285 Call Trace: kfree+0x113/0x3c0 usb_free_urb.part.0+0x91/0xb0 Drop the redundant kfree(buf); usb_free_urb() already releases the transfer buffer. This mirrors commit 03819abbeb11 ("net: usb: lan78xx: Fix double free issue with interrupt buffer allocation").
Quoted source text, attributed separately from HOL analysis.