Description
In the Linux kernel, the following vulnerability has been resolved: comedi: vmk80xx: fix transfer-buffer overflows The driver uses endpoint-sized USB transfer buffers but up until recently had no sanity checks on the sizes. Commit e1f13c879a7c ("staging: comedi: check validity of wMaxPacketSize of usb endpoints found") inadvertently fixed NULL-pointer dereferences when accessing the transfer buffers in case a malicious device has a zero wMaxPacketSize. Make sure to allocate buffers large enough to handle also the other accesses that are done without a size check (e.g. byte 18 in vmk80xx_cnt_insn_read() for the VMK8061_MODEL) to avoid writing beyond the buffers, for example, when doing descriptor fuzzing. The original driver was for a low-speed device with 8-byte buffers. Support was later added for a device that uses bulk transfers and is presumably a full-speed device with a maximum 64-byte wMaxPacketSize.
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
985cafccbf9b7f862aa1c5ee566801e18b5161fb to < 5229159f1d052821007aff1a1beb7873eacf1a9faffected985cafccbf9b7f862aa1c5ee566801e18b5161fb to < ec85bcff4ed09260243d8f39faba99e1041718baaffected985cafccbf9b7f862aa1c5ee566801e18b5161fb to < 40d2a7e278e2e7c0a5fd7e997e7eb63945bf93f7affected985cafccbf9b7f862aa1c5ee566801e18b5161fb to < 7a2021b896de1ad559d33b5c5cdd20b982242088affected985cafccbf9b7f862aa1c5ee566801e18b5161fb to < 199acd8c110e3ae62833c24f632b0bb1c9f012a9affected985cafccbf9b7f862aa1c5ee566801e18b5161fb to < 33d7a470730dfe7c9bfc8da84575cf2cedd60d00affected985cafccbf9b7f862aa1c5ee566801e18b5161fb to < 278484ae93297b1bb1ce755f9d3b6d95a48c7d47affected985cafccbf9b7f862aa1c5ee566801e18b5161fb to < 06ac746d57e6d32b062e220415c607b7e2e0fa50affected985cafccbf9b7f862aa1c5ee566801e18b5161fb to < a23461c47482fc232ffc9b819539d1f837adf2b1affected
Linux Linux
Default version status: affected
2.6.31affected0 to < 2.6.31unaffected4.4.292 to ≤ 4.4.*unaffected4.9.290 to ≤ 4.9.*unaffected4.14.255 to ≤ 4.14.*unaffected4.19.217 to ≤ 4.19.*unaffected5.4.159 to ≤ 5.4.*unaffected5.10.79 to ≤ 5.10.*unaffected5.14.18 to ≤ 5.14.*unaffected5.15.2 to ≤ 5.15.*unaffected5.16 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/5229159f1d052821007aff1a1beb7873eacf1a9f ↗
- https://git.kernel.org/stable/c/ec85bcff4ed09260243d8f39faba99e1041718ba ↗
- https://git.kernel.org/stable/c/40d2a7e278e2e7c0a5fd7e997e7eb63945bf93f7 ↗
- https://git.kernel.org/stable/c/7a2021b896de1ad559d33b5c5cdd20b982242088 ↗
- https://git.kernel.org/stable/c/199acd8c110e3ae62833c24f632b0bb1c9f012a9 ↗
- https://git.kernel.org/stable/c/33d7a470730dfe7c9bfc8da84575cf2cedd60d00 ↗
- https://git.kernel.org/stable/c/278484ae93297b1bb1ce755f9d3b6d95a48c7d47 ↗
- https://git.kernel.org/stable/c/06ac746d57e6d32b062e220415c607b7e2e0fa50 ↗
- https://git.kernel.org/stable/c/a23461c47482fc232ffc9b819539d1f837adf2b1 ↗