# CVE-2022-48996: linux: In the Linux kernel, the following vulnerability has been resolved:  mm/damon/sysfs: fix wrong empty schemes assumpti...

CVE-2022-48996 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48996, released October 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48996
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  mm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes()  Commit da87878010e5 ("mm/damon/sysfs: support online inputs update") made 'damon_sysfs_set_schemes()' to be called for running DAMON context, which could have schemes.  In the case, DAMON sysfs interface is supposed to update, remove, or add schemes to reflect the sysfs files.  However, the code is assuming the DAMON context wouldn't have schemes at all, and therefore creates and adds new schemes.  As a result, the code doesn't work as intended for online schemes tuning and could have more than expected memory footprint.  The schemes are all in the DAMON context, so it doesn't leak the memory, though.  Remove the wrong asssumption (the DAMON context wouldn't have schemes) in 'damon_sysfs_set_schemes()' to fix the bug.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.12-1 | [DEBIAN-CVE-2022-48996](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48996.md) | Oct 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.0.12-1 | [DEBIAN-CVE-2022-48996](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48996.md) | Oct 21, 2024 |
| Linux | linux Debian 14 | 6.0.12-1 | [DEBIAN-CVE-2022-48996](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48996.md) | Oct 21, 2024 |

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