cbcvebase.
CVE-2025-40106
published 2025-10-31

CVE-2025-40106: In the Linux kernel, the following vulnerability has been resolved: comedi: fix divide-by-zero in comedi_buf_munge() The comedi_buf_munge() function performs a…

PriorityP424high7.8
EPSS
0.20%
9.7th percentile
In the Linux kernel, the following vulnerability has been resolved: comedi: fix divide-by-zero in comedi_buf_munge() The comedi_buf_munge() function performs a modulo operation `async->munge_chan %= async->cmd.chanlist_len` without first checking if chanlist_len is zero. If a user program submits a command with chanlist_len set to zero, this causes a divide-by-zero error when the device processes data in the interrupt handler path. Add a check for zero chanlist_len at the beginning of the function, similar to the existing checks for !map and CMDF_RAWDATA flag. When chanlist_len is zero, update munge_count and return early, indicating the data was handled without munging. This prevents potential kernel panics from malformed user commands.

Affected

32 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.158-1 (bookworm)linux 6.1.158-1 (bookworm)
debianlinux-6.1< linux 6.1.158-1 (bookworm)linux 6.1.158-1 (bookworm)
linuxlinux
linuxlinux>= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 4ffea48c69cb2b96a281cb7e5e42d706996631db4ffea48c69cb2b96a281cb7e5e42d706996631db
linuxlinux>= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 8f3e4cd9be4b47246ea73ce5e3e0fa2f57f0d10c8f3e4cd9be4b47246ea73ce5e3e0fa2f57f0d10c
linuxlinux>= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 2670932f2465793fea1ef073e40883e8390fa4d92670932f2465793fea1ef073e40883e8390fa4d9
linuxlinux>= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 6db19822512396be1a3e1e20c16c97270285ba1a6db19822512396be1a3e1e20c16c97270285ba1a
linuxlinux>= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < d4854eff25efb06d0d84c13e7129bbdba4125f8cd4854eff25efb06d0d84c13e7129bbdba4125f8c
linuxlinux>= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < a4bb5d1bc2f238461bcbe5303eb500466690bb2ca4bb5d1bc2f238461bcbe5303eb500466690bb2c
linuxlinux>= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 55520f65fd447e04099a2c44185453c18ea73b7e55520f65fd447e04099a2c44185453c18ea73b7e
linuxlinux>= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 87b318ba81dda2ee7b603f4f6c55e78ec3e9597487b318ba81dda2ee7b603f4f6c55e78ec3e95974
linuxlinux_kernel>= 0 < 5.10.247-15.10.247-1
linuxlinux_kernel>= 0 < 6.1.158-16.1.158-1
linuxlinux_kernel>= 0 < 6.12.57-16.12.57-1
linuxlinux_kernel>= 0 < 6.17.6-16.17.6-1
linuxlinux_kernel>= 0 < 5.15.0-170.1805.15.0-170.180
linuxlinux_kernel>= 0 < 6.8.0-106.1066.8.0-106.106
linuxlinux_kernel>= 0 < 6.17.0-14.146.17.0-14.14
linuxlinux_kernel>= 2.6.29 < 5.4.3015.4.301
linuxlinux_kernel>= 5.11.0 < 5.15.1965.15.196
linuxlinux_kernel>= 5.16.0 < 6.1.1586.1.158
linuxlinux_kernel>= 5.5.0 < 5.10.2465.10.246
linuxlinux_kernel>= 6.13.0 < 6.17.66.17.6
linuxlinux_kernel>= 6.2.0 < 6.6.1156.6.115
linuxlinux_kernel>= 6.7.0 < 6.12.566.12.56

CVSS provenance

osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_msrc5.5MEDIUM
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