CVE-2026-64351None▾ SunlitIn 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 onl…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= d40261236e8e278cb1936cb5e934262971692b10 < 391706889a5112feafdc0c68db3ecc7ed325d09cLinux >= d40261236e8e278cb1936cb5e934262971692b10 < aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54bLinux >= d40261236e8e278cb1936cb5e934262971692b10 < 2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4aLinux >= d40261236e8e278cb1936cb5e934262971692b10 < 46ab32870d010e9a057bc5659cea22b7e728ca88Linux >= d40261236e8e278cb1936cb5e934262971692b10 < c466097d85d52f3aa200736cb4759e66d4bbf6e3Linux >= d40261236e8e278cb1936cb5e934262971692b10 < e24eb271061db384a3c3ef6f107fe515e68ef222Linux >= d40261236e8e278cb1936cb5e934262971692b10 < 51e65f1d78457ea4f9513d90ab22c9dccbb35110Linux >= d40261236e8e278cb1936cb5e934262971692b10 < 47b6bcef6e679593d2e86e04ee72c46a4e2f7139Linux 3.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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