CVE-2024-26993

Medium

In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL.

Package Linux Kernel
Published 2024-05-01
Last modified 2026-05-12
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 3.16.62, 3.18.121, 4.4.154, 4.9.125, 4.14.68, 4.18.6, 4.19 and later are affected. Fixed in 4.19.313, 5.4.275, 5.10.216, 5.15.157, 6.1.88, 6.6.29, 6.8.8, 6.9 and their respective stable series.

Affected from
≥ 3.16.62 ≥ 3.18.121 ≥ 4.4.154 ≥ 4.9.125 ≥ 4.14.68 ≥ 4.18.6 ≥ 4.19
Fixed in
✓ 4.19.313 4.19.x ✓ 5.4.275 5.4.x ✓ 5.10.216 5.10.x ✓ 5.15.157 5.15.x ✓ 6.1.88 6.1.x ✓ 6.6.29 6.6.x ✓ 6.8.8 6.8.x ✓ 6.9

References

15 total
Showing 5 of 15 references View all on NVD

Frequently asked questions

  • What is CVE-2024-26993?

    CVE-2024-26993 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 3.16.62 onward and has been patched in 4.19.313, 5.4.275, 5.10.216 and others. CVE-2024-26993 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-26993?

    CVE-2024-26993 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2024-26993?

    Yes. CVE-2024-26993 has been patched. Fixed versions include 4.19.313, 5.4.275, 5.10.216 and others. If you are running Linux kernel 3.16.62 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-26993 actively exploited?

    No. CVE-2024-26993 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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