{"cve":"CVE-2026-64571","nvd":{"published":"2026-08-05T08:16:36.797","modified":"2026-08-19T17:20:16.940","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: p54: validate RX frame length in p54_rx_eeprom_readback()\n\np54_rx_eeprom_readback() copies the requested EEPROM slice out of a\ndevice-supplied readback frame without checking that the skb actually holds\nthat many bytes. Commit da1b9a55ff11 (\"wifi: p54: prevent buffer-overflow in\np54_rx_eeprom_readback()\") closed the destination overflow by copying a\nfixed priv->eeprom_slice_size (and rejecting a mismatched advertised len),\nbut the source side is still unbounded: nothing verifies the frame is long\nenough to supply that many bytes.\n\nA malicious USB device can send a short frame whose advertised len matches\npriv->eeprom_slice_size while the payload is truncated. The equality check\npasses and memcpy() reads past the end of the skb, leaking adjacent heap:\n\n  BUG: KASAN: slab-out-of-bounds in p54_rx (drivers/net/wireless/intersil/p54/txrx.c:507)\n  Read of size 1016 at addr ffff88800f077114 by task swapper/0/0\n  Call Trace:\n   <IRQ>\n   ...\n   __asan_memcpy (mm/kasan/shadow.c:105)\n   p54_rx (drivers/net/wireless/intersil/p54/txrx.c:507)\n   p54u_rx_cb (drivers/net/wireless/intersil/p54/p54usb.c:163)\n   __usb_hcd_giveback_urb (drivers/usb/core/hcd.c:1657)\n   dummy_timer (drivers/usb/gadget/udc/dummy_hcd.c:2005)\n   ...\n   </IRQ>\n\n  The buggy address belongs to the object at ffff88800f0770c0\n   which belongs to the cache skbuff_small_head of size 704\n  The buggy address is located 84 bytes inside of\n   allocated 704-byte region [ffff88800f0770c0, ffff88800f077380)\n\nCheck that the slice fits in the skb before copying.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/25c3b85af3fc4f8043159b14e65790fc3bbdaf48","https://git.kernel.org/stable/c/7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7","https://git.kernel.org/stable/c/88f7044f92b8326fbfab26d0d8ed297c367ebb76","https://git.kernel.org/stable/c/9096e1f7014174067239a63df18ae5f28301990d","https://git.kernel.org/stable/c/d38f5d868a0a4770e3bcd0925e16c46acdbc9509"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-64571","score":0.00171,"percentile":0.06441,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}