CVE-2026-64571wifi: p54: validate RX frame length in p54_rx_eeprom_readback()
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: wifi: p54: validate RX frame length in p54_rx_eeprom_readback() p54_rx_eeprom_readback() copies the requested EEPROM slice out of a device-supplied readback frame without checking that the skb actually holds that many bytes. Commit da1b9a55ff11 ("wifi: p54: prevent buffer-overflow in p54_rx_eeprom_readback()") closed the destination overflow by copying a fixed priv->eeprom_slice_size (and rejecting a mismatched advertised len), but the source side is still unbounded: nothing verifies the frame is long enough to supply that many bytes. A malicious USB device can send a short frame whose advertised len matches priv->eeprom_slice_size while the payload is truncated. The equality check passes and memcpy() reads past the end of the skb, leaking adjacent heap: BUG: KASAN: slab-out-of-bounds in p54_rx (drivers/net/wireless/intersil/p54/txrx.c:507) Read of size 1016 at addr ffff88800f077114 by task swapper/0/0 Call Trace: <IRQ> ... __asan_memcpy (mm/kasan/shadow.c:105) p54_rx (drivers/net/wireless/intersil/p54/txrx.c:507) p54u_rx_cb (drivers/net/wireless/intersil/p54/p54usb.c:163) __usb_hcd_giveback_urb (drivers/usb/core/hcd.c:1657) dummy_timer (drivers/usb/gadget/udc/dummy_hcd.c:2005) ... </IRQ> The buggy address belongs to the object at ffff88800f0770c0 which belongs to the cache skbuff_small_head of size 704 The buggy address is located 84 bytes inside of allocated 704-byte region [ffff88800f0770c0, ffff88800f077380) Check that the slice fits in the skb before copying.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 7cb770729ba895f73253dfcd46c3fcba45d896f9 builds before 7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7; from 7cb770729ba895f73253dfcd46c3fcba45d896f9 before 88f7044f92b8326fbfab26d0d8ed297c367ebb76; from 7cb770729ba895f73253dfcd46c3fcba45d896f9 before f21b7e096fe5371bf697cd410537fb434a763f5e; from 7cb770729ba895f73253dfcd46c3fcba45d896f9 before 25c3b85af3fc4f8043159b14e65790fc3bbdaf48; from 7cb770729ba895f73253dfcd46c3fcba45d896f9 before f46f8f9c43fd02f4dd5f716d4bda296a523c04f0; from 7cb770729ba895f73253dfcd46c3fcba45d896f9 before d38f5d868a0a4770e3bcd0925e16c46acdbc9509; from 7cb770729ba895f73253dfcd46c3fcba45d896f9 before 9096e1f7014174067239a63df18ae5f28301990d; from 7cb770729ba895f73253dfcd46c3fcba45d896f9 before ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea | CNA record |
References
- https://git.kernel.org/stable/c/7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7
- https://git.kernel.org/stable/c/88f7044f92b8326fbfab26d0d8ed297c367ebb76
- https://git.kernel.org/stable/c/f21b7e096fe5371bf697cd410537fb434a763f5e
- https://git.kernel.org/stable/c/25c3b85af3fc4f8043159b14e65790fc3bbdaf48
- https://git.kernel.org/stable/c/f46f8f9c43fd02f4dd5f716d4bda296a523c04f0
- https://git.kernel.org/stable/c/d38f5d868a0a4770e3bcd0925e16c46acdbc9509
- https://git.kernel.org/stable/c/9096e1f7014174067239a63df18ae5f28301990d
- https://git.kernel.org/stable/c/ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.