Strix
26.1K

CVE-2025-40106

UnknownEPSS 0.19%

Last modified

CVE-2025-40106 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.19%

9.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= ed9eccbe8970f6eedc1b978c157caf1251a896d4, < 4ffea48c69cb2b96a281cb7e5e42d706996631db; >= ed9eccbe8970f6eedc1b978c157caf1251a896d4, < 8f3e4cd9be4b47246ea73ce5e3e0fa2f57f0d10c; >= ed9eccbe8970f6eedc1b978c157caf1251a896d4, < 2670932f2465793fea1ef073e40883e8390fa4d9; >= ed9eccbe8970f6eedc1b978c157caf1251a896d4, < 6db19822512396be1a3e1e20c16c97270285ba1a; >= ed9eccbe8970f6eedc1b978c157caf1251a896d4, < d4854eff25efb06d0d84c13e7129bbdba4125f8c; >= ed9eccbe8970f6eedc1b978c157caf1251a896d4, < a4bb5d1bc2f238461bcbe5303eb500466690bb2c; >= ed9eccbe8970f6eedc1b978c157caf1251a896d4, < 55520f65fd447e04099a2c44185453c18ea73b7e; >= ed9eccbe8970f6eedc1b978c157caf1251a896d4, < 87b318ba81dda2ee7b603f4f6c55e78ec3e95974
LinuxLinux2.6.29

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is 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 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.
How severe is CVE-2025-40106?
Severity scoring for CVE-2025-40106 is pending analysis. The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
How do I fix CVE-2025-40106?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2025

View all 2025CVEs →

Are you affected by CVE-2025-40106?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST