CVE-2026-74456High· 7.8▾ TwilightIn 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() an…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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").
Linux >= bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d < 914c3b8fa175acf8476ad31cf04e308638e3578eLinux >= bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d < 5f2fa5840c34d3a558c57855781be75e03bef752Linux >= bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d < b9088d581fff971a7eb1628f8dcc30df6cfef4dcLinux >= bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d < 525640b93d3e5f82f4ebea4730f4e0cf799522baLinux >= bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d < 4bb3325075138dd5346b71589a959878b564dc0bLinux >= bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d < 92d0de80ca2223b9c7da78020155b6cb27824cc0Linux >= bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d < dfb17bf04a764462000f11258a7c06aa92d1f261Linux >= bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d < 9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9Linux 3.4Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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