{"apiVersion":"1.0","identifier":"CVE-2026-74456","description":"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-).","publishedAt":"2026-08-15T13:17:50","lastModifiedAt":"2026-08-19T17:21:02","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74456","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00129,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74456","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74456","en":"https://www.redsauce.net/en/cves/CVE-2026-74456","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74456","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74456","de":"https://www.redsauce.net/de/cves/CVE-2026-74456","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74456","el":"https://www.redsauce.net/el/cves/CVE-2026-74456"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74456"}}