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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-64351

net: usb: kalmia: bound RX frame length in kalmia_rx_fixup()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: kalmia: bound RX frame length in kalmia_rx_fixup() kalmia_rx_fixup() computes usb_packet_length = skb->len - (2 * KALMIA_HEADER_LENGTH) as a u16, guarded only by a pre-loop check that skb->len is at least KALMIA_HEADER_LENGTH, which is 6. A device can deliver a short bulk-IN frame with skb->len in the 6 to 11 range, or leave a short trailing remainder on a later loop iteration. Either case underflows usb_packet_length to about 65530. That bypasses the usb_packet_length < ether_packet_length truncation path. The device-supplied ether_packet_length, a le16 up to 65535 read from header_start[2], then drives a memcmp() and the following skb_trim() and skb_pull() past the end of the rx buffer. The rx buffer is hard_mtu * 10, which is 14000 bytes. That is an out of bounds read. Require both the start and end framing headers to be present before subtracting them, on every loop iteration.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • d40261236e8e278cb1936cb5e934262971692b10 to < 391706889a5112feafdc0c68db3ecc7ed325d09caffected
  • d40261236e8e278cb1936cb5e934262971692b10 to < aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54baffected
  • d40261236e8e278cb1936cb5e934262971692b10 to < 2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4aaffected
  • d40261236e8e278cb1936cb5e934262971692b10 to < 46ab32870d010e9a057bc5659cea22b7e728ca88affected
  • d40261236e8e278cb1936cb5e934262971692b10 to < c466097d85d52f3aa200736cb4759e66d4bbf6e3affected
  • d40261236e8e278cb1936cb5e934262971692b10 to < e24eb271061db384a3c3ef6f107fe515e68ef222affected
  • d40261236e8e278cb1936cb5e934262971692b10 to < 51e65f1d78457ea4f9513d90ab22c9dccbb35110affected
  • d40261236e8e278cb1936cb5e934262971692b10 to < 47b6bcef6e679593d2e86e04ee72c46a4e2f7139affected

Linux Linux

Default version status: affected

  • 3.0affected
  • 0 to < 3.0unaffected
  • 5.10.261 to ≤ 5.10.*unaffected
  • 5.15.212 to ≤ 5.15.*unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.96 to ≤ 6.12.*unaffected
  • 6.18.39 to ≤ 6.18.*unaffected
  • 7.1.4 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References