{"id":7446,"date":"2026-09-04T18:49:33","date_gmt":"2026-09-04T10:49:33","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74456"},"modified":"2026-09-04T18:49:33","modified_gmt":"2026-09-04T10:49:33","slug":"cve-2026-74456","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74456","title":{"rendered":"CVE-2026-74456 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ncan: peak_usb: peak_u"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>can: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error<\/p>\n<p>In peak_usb_start(), each RX URB transfer buffer is allocated with kmalloc()<br \/>\nand the URB is flagged URB_FREE_BUFFER so that the final usb_free_urb() also<br \/>\nfrees the transfer buffer.<\/p>\n<p>If usb_submit_urb() fails, the error path frees the buffer explicitly with<br \/>\nkfree(buf) and then calls usb_free_urb(urb). Because URB_FREE_BUFFER is set,<br \/>\nusb_free_urb() -&gt; urb_destroy() frees the same buffer a second time, a double<br \/>\nfree of the transfer buffer.<\/p>\n<p>  BUG: KASAN: double-free in usb_free_urb.part.0+0x91\/0xb0<br \/>\n  Free of addr ffff8881069ccb80 by task trigger.sh\/285<\/p>\n<p>  Call Trace:<br \/>\n   kfree+0x113\/0x3c0<br \/>\n   usb_free_urb.part.0+0x91\/0xb0<\/p>\n<p>Drop the redundant kfree(buf); usb_free_urb() already releases the transfer<br \/>\nbuffer. This mirrors commit 03819abbeb11 (&#8220;net: usb: lan78xx: Fix double free<br \/>\nissue with interrupt buffer allocation&#8221;).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>can: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error<\/p>\n<p>In peak_usb_start(), each RX URB transfer <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7446","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7446","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7446"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7446"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7446"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}