FKIE_CVE-2026-64571

Vulnerability from fkie_nvd - Published: 2026-08-05 08:16 - Updated: 2026-08-05 08:16
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/25c3b85af3fc4f8043159b14e65790fc3bbdaf48
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9096e1f7014174067239a63df18ae5f28301990d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d38f5d868a0a4770e3bcd0925e16c46acdbc9509
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f46f8f9c43fd02f4dd5f716d4bda296a523c04f0
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/intersil/p54/txrx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "25c3b85af3fc4f8043159b14e65790fc3bbdaf48",
              "status": "affected",
              "version": "7cb770729ba895f73253dfcd46c3fcba45d896f9",
              "versionType": "git"
            },
            {
              "lessThan": "f46f8f9c43fd02f4dd5f716d4bda296a523c04f0",
              "status": "affected",
              "version": "7cb770729ba895f73253dfcd46c3fcba45d896f9",
              "versionType": "git"
            },
            {
              "lessThan": "d38f5d868a0a4770e3bcd0925e16c46acdbc9509",
              "status": "affected",
              "version": "7cb770729ba895f73253dfcd46c3fcba45d896f9",
              "versionType": "git"
            },
            {
              "lessThan": "9096e1f7014174067239a63df18ae5f28301990d",
              "status": "affected",
              "version": "7cb770729ba895f73253dfcd46c3fcba45d896f9",
              "versionType": "git"
            },
            {
              "lessThan": "ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea",
              "status": "affected",
              "version": "7cb770729ba895f73253dfcd46c3fcba45d896f9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/intersil/p54/txrx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.28"
            },
            {
              "lessThan": "2.6.28",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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 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-\u003eeeprom_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-\u003eeeprom_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   \u003cIRQ\u003e\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   \u003c/IRQ\u003e\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."
    }
  ],
  "id": "CVE-2026-64571",
  "lastModified": "2026-08-05T08:16:36.797",
  "metrics": {},
  "published": "2026-08-05T08:16:36.797",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/25c3b85af3fc4f8043159b14e65790fc3bbdaf48"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9096e1f7014174067239a63df18ae5f28301990d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d38f5d868a0a4770e3bcd0925e16c46acdbc9509"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f46f8f9c43fd02f4dd5f716d4bda296a523c04f0"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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