CVE-2022-4378 — A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a
A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalate their privileges on the system.
Published
2023-01-05T00:00:00.000Z
Last modified
2025-04-10T14:19:42.254Z
01What is this vulnerability?
A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalate their privileges on the system.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / kernel | kernel 6.0.12 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-01-05T00:00:00.000Z
- Last modified: 2025-04-10T14:19:42.254Z
09References
- bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=2152548
- git.kernel.org — https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/que…
- git.kernel.org — https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/que…
- seclists.org — https://seclists.org/oss-sec/2022/q4/178
- packetstormsecurity.com — http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LN…
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