CVE-2024-26993
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
- Exploit odds
- 0.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.3% in the next 30 days (EPSS).
- Severity: 5.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.3% · EPSS, next 30 days
- Record status
- Modified
Affected
- Linux Kernel < 3.17
- Linux Kernel < 3.19
- Linux Kernel < 4.5
- Linux Kernel < 4.10
- Linux Kernel < 4.15
- Linux Kernel < 4.19
- Linux Kernel < 5.15.157
- Linux Kernel < 6.1.88
Attack profile CVSS 3.1 · 5.5
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2024-26993.md and follow it. Check whether this project is affected by CVE-2024-26993. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30c
- https://git.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063
- https://git.kernel.org/stable/c/5d43e072285e81b0b63cee7189b3357c7768a43b
- https://git.kernel.org/stable/c/84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17
- https://git.kernel.org/stable/c/a4c99b57d43bab45225ba92d574a8683f9edc8e4
- https://git.kernel.org/stable/c/a90bca2228c0646fc29a72689d308e5fe03e6d78
- https://git.kernel.org/stable/c/ac107356aabc362aaeb77463e814fc067a5d3957
- https://git.kernel.org/stable/c/f28bba37fe244889b81bb5c508d3f6e5c6e342c5
- https://git.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30c
- https://git.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063
References
- https://git.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30c
- https://git.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063
- https://git.kernel.org/stable/c/5d43e072285e81b0b63cee7189b3357c7768a43b
- https://git.kernel.org/stable/c/84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17
- https://git.kernel.org/stable/c/a4c99b57d43bab45225ba92d574a8683f9edc8e4
- https://git.kernel.org/stable/c/a90bca2228c0646fc29a72689d308e5fe03e6d78
- https://git.kernel.org/stable/c/ac107356aabc362aaeb77463e814fc067a5d3957
- https://git.kernel.org/stable/c/f28bba37fe244889b81bb5c508d3f6e5c6e342c5
- https://git.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30c
- https://git.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063
- https://git.kernel.org/stable/c/5d43e072285e81b0b63cee7189b3357c7768a43b
- https://git.kernel.org/stable/c/84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17
- https://git.kernel.org/stable/c/a4c99b57d43bab45225ba92d574a8683f9edc8e4
- https://git.kernel.org/stable/c/a90bca2228c0646fc29a72689d308e5fe03e6d78
- https://git.kernel.org/stable/c/ac107356aabc362aaeb77463e814fc067a5d3957
- https://git.kernel.org/stable/c/f28bba37fe244889b81bb5c508d3f6e5c6e342c5
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://lists.fedoraproject.org/archives/list/[email protected]/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html