# CVE-2026-31750: linux: In the Linux kernel, the following vulnerability has been resolved:  comedi: runflags cannot determine whether to rec...

CVE-2026-31750 is fixed in linux on 1 platform by DEBIAN-CVE-2026-31750 (version 6.19.12-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-31750
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0011
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  comedi: runflags cannot determine whether to reclaim chanlist  syzbot reported a memory leak [1], because commit 4e1da516debb ("comedi: Add reference counting for Comedi command handling") did not consider the exceptional exit case in do_cmd_ioctl() where runflags is not set. This caused chanlist not to be properly freed by do_become_nonbusy(), as it only frees chanlist when runflags is correctly set.  Added a check in do_become_nonbusy() for the case where runflags is not set, to properly free the chanlist memory.  [1] BUG: memory leak   backtrace (crc 844a0efa):     __comedi_get_user_chanlist drivers/comedi/comedi_fops.c:1815 [inline]     do_cmd_ioctl.part.0+0x112/0x350 drivers/comedi/comedi_fops.c:1890     do_cmd_ioctl drivers/comedi/comedi_fops.c:1858 [inline]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.19.12-1 | [DEBIAN-CVE-2026-31750](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31750.md) | May 15, 2026 |

---

Data as of 2026-11-10T13:56:55Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.