wifi: p54: validate RX frame length in p54_rx_eeprom_readback()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64571
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-05 08:16:36 UTC
Updated2026-08-05 08:16:36 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001560000 probability, percentile 0.052520000 (date 2026-08-09)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7cb770729ba895f73253dfcd46c3fcba45d896f9 25c3b85af3fc4f8043159b14e65790fc3bbdaf48 git Not specified
CNA Linux Linux affected 7cb770729ba895f73253dfcd46c3fcba45d896f9 f46f8f9c43fd02f4dd5f716d4bda296a523c04f0 git Not specified
CNA Linux Linux affected 7cb770729ba895f73253dfcd46c3fcba45d896f9 d38f5d868a0a4770e3bcd0925e16c46acdbc9509 git Not specified
CNA Linux Linux affected 7cb770729ba895f73253dfcd46c3fcba45d896f9 9096e1f7014174067239a63df18ae5f28301990d git Not specified
CNA Linux Linux affected 7cb770729ba895f73253dfcd46c3fcba45d896f9 ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea git Not specified
CNA Linux Linux affected 2.6.28 Not specified
CNA Linux Linux unaffected 2.6.28 semver Not specified
CNA Linux Linux unaffected 6.6.148 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.101 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.42 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.6 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/25c3b85af3fc4f8043159b14e65790fc3bbdaf48 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9096e1f7014174067239a63df18ae5f28301990d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f46f8f9c43fd02f4dd5f716d4bda296a523c04f0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d38f5d868a0a4770e3bcd0925e16c46acdbc9509 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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