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CVE-2026-64571— wifi: p54: validate RX frame length in p54_rx_eeprom_readback()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于p54_rx_eeprom_readback()函数未验证RX帧长度，可能导致越界读取并泄漏相邻堆内存。

AI Predicted 8.1 Difficulty: Hard EPSS 0.17% · P6

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 7cb770729ba895f73253dfcd46c3fcba45d896f9< 7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7 affected
7cb770729ba895f73253dfcd46c3fcba45d896f9< 88f7044f92b8326fbfab26d0d8ed297c367ebb76 affected
7cb770729ba895f73253dfcd46c3fcba45d896f9< f21b7e096fe5371bf697cd410537fb434a763f5e affected
7cb770729ba895f73253dfcd46c3fcba45d896f9< 25c3b85af3fc4f8043159b14e65790fc3bbdaf48 affected
7cb770729ba895f73253dfcd46c3fcba45d896f9< f46f8f9c43fd02f4dd5f716d4bda296a523c04f0 affected
7cb770729ba895f73253dfcd46c3fcba45d896f9< d38f5d868a0a4770e3bcd0925e16c46acdbc9509 affected
7cb770729ba895f73253dfcd46c3fcba45d896f9< 9096e1f7014174067239a63df18ae5f28301990d affected
7cb770729ba895f73253dfcd46c3fcba45d896f9< ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea affected
… +10 more rows
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I. Basic Information for CVE-2026-64571

Vulnerability Information
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Vulnerability Title
wifi: p54: validate RX frame length in p54_rx_eeprom_readback()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于p54_rx_eeprom_readback()函数未验证RX帧长度，可能导致越界读取并泄漏相邻堆内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 7cb770729ba895f73253dfcd46c3fcba45d896f9 ~ 7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7 -
Linux Linux 2.6.28 -

II. Public POCs for CVE-2026-64571

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III. Intelligence Information for CVE-2026-64571

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Patches & Fixes for CVE-2026-64571 (7)

Same Patch Batch · Linux · 2026-08-05 · 17 CVEs total

CVE-2026-64566 9.8 CRITICAL xfrm: iptfs: propagate SKBFL_SHARED_FRAG in iptfs_skb_add_frags()
CVE-2026-64578 8.2 HIGH ksmbd: validate compound request size before reading StructureSize2
CVE-2026-64567 7.8 HIGH btrfs: reject free space cache with more entries than pages
CVE-2026-64568 7.8 HIGH wifi: mac80211: fix unsol_bcast_probe_resp double free on alloc failure
CVE-2026-64570 7.8 HIGH wifi: mac80211: fix fils_discovery double free on alloc failure
CVE-2026-64574 7.8 HIGH wifi: mac80211: tear down new links on vif update error path
CVE-2026-64575 7.8 HIGH bpf: tcp: fix double sock release on batch realloc
CVE-2026-64580 7.8 HIGH xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()
CVE-2026-64581 7.8 HIGH xfrm: fix sk_dst_cache double-free in xfrm_user_policy()
CVE-2026-64582 7.8 HIGH RDMA/rxe: Fix a use-after-free problem in rxe_mmap
CVE-2026-64577 7.5 HIGH gtp: check skb_pull_data() return in gtp1u_send_echo_resp()
CVE-2026-64576 7.1 HIGH nexthop: initialize extack in nh_res_bucket_migrate()
CVE-2026-64569 mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n
CVE-2026-64572 ipv4: fib: free fib_alias with kfree_rcu() on insert error path
CVE-2026-64573 Bluetooth: qca: fix NVM tag length underflow in TLV parser
CVE-2026-64579 xfrm: policy: preallocate inexact bins before xfrm_hash_rebuild reinsert

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64571

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