Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 7cb770729ba895f73253dfcd46c3fcba45d896f9, < 7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7; >= 7cb770729ba895f73253dfcd46c3fcba45d896f9, < 88f7044f92b8326fbfab26d0d8ed297c367ebb76; >= 7cb770729ba895f73253dfcd46c3fcba45d896f9, < f21b7e096fe5371bf697cd410537fb434a763f5e; >= 7cb770729ba895f73253dfcd46c3fcba45d896f9, < 25c3b85af3fc4f8043159b14e65790fc3bbdaf48; >= 7cb770729ba895f73253dfcd46c3fcba45d896f9, < f46f8f9c43fd02f4dd5f716d4bda296a523c04f0; >= 7cb770729ba895f73253dfcd46c3fcba45d896f9, < d38f5d868a0a4770e3bcd0925e16c46acdbc9509; >= 7cb770729ba895f73253dfcd46c3fcba45d896f9, < 9096e1f7014174067239a63df18ae5f28301990d; >= 7cb770729ba895f73253dfcd46c3fcba45d896f9, < ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea |
| Linux | Linux | 2.6.28 |
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
- https://git.kernel.org/stable/c/ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea
- https://git.kernel.org/stable/c/f21b7e096fe5371bf697cd410537fb434a763f5e
- https://git.kernel.org/stable/c/f46f8f9c43fd02f4dd5f716d4bda296a523c04f0
Timeline
- Published
- Aug 5, 2026
- Last modified
- Aug 19, 2026
- NVD status
- Received