{"id":"CVE-2026-64571","title":"wifi: p54: validate RX frame length in p54_rx_eeprom_readback()","summary":"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 with…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < 7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7","Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < 88f7044f92b8326fbfab26d0d8ed297c367ebb76","Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < f21b7e096fe5371bf697cd410537fb434a763f5e","Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < 25c3b85af3fc4f8043159b14e65790fc3bbdaf48","Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < f46f8f9c43fd02f4dd5f716d4bda296a523c04f0","Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < d38f5d868a0a4770e3bcd0925e16c46acdbc9509","Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < 9096e1f7014174067239a63df18ae5f28301990d","Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea","Linux 2.6.28"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:41:37.154533Z"},"published":"2026-08-05","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:44:57.541Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64571","references":[{"url":"https://git.kernel.org/stable/c/7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7"},{"url":"https://git.kernel.org/stable/c/88f7044f92b8326fbfab26d0d8ed297c367ebb76"},{"url":"https://git.kernel.org/stable/c/f21b7e096fe5371bf697cd410537fb434a763f5e"},{"url":"https://git.kernel.org/stable/c/25c3b85af3fc4f8043159b14e65790fc3bbdaf48"},{"url":"https://git.kernel.org/stable/c/f46f8f9c43fd02f4dd5f716d4bda296a523c04f0"},{"url":"https://git.kernel.org/stable/c/d38f5d868a0a4770e3bcd0925e16c46acdbc9509"},{"url":"https://git.kernel.org/stable/c/9096e1f7014174067239a63df18ae5f28301990d"},{"url":"https://git.kernel.org/stable/c/ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea"}],"tags":["cve.org"],"epss":0.00171,"epssPercentile":0.06493,"ingestedAt":"2026-11-06T16:57:43.151Z","slug":"CVE-2026-64571","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < 7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7`\n- `Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < 88f7044f92b8326fbfab26d0d8ed297c367ebb76`\n- `Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < f21b7e096fe5371bf697cd410537fb434a763f5e`\n- `Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < 25c3b85af3fc4f8043159b14e65790fc3bbdaf48`\n- `Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < f46f8f9c43fd02f4dd5f716d4bda296a523c04f0`\n- `Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < d38f5d868a0a4770e3bcd0925e16c46acdbc9509`\n- `Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < 9096e1f7014174067239a63df18ae5f28301990d`\n- `Linux >= 7cb770729ba895f73253dfcd46c3fcba45d896f9 < ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea`\n- `Linux 2.6.28`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}