SARA / Free Tools / CVE / CVE-2023-39191

CVE-2023-39191 — An improper input validation flaw was found in the eBPF subsystem in the Linux k

An improper input validation flaw was found in the eBPF subsystem in the Linux kernel. The issue occurs due to a lack of proper validation of dynamic pointers within user-supplied eBPF programs prior to executing them. This may allow an attacker with CAP_BPF privileges to escalat

CVSS
8.2 HIGH
EPSS
1.00% (top 98.50%)
CWE
CWE-20
Published
2023-10-04T18:03:02.966Z
Last modified
2025-11-06T21:01:40.060Z
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

01What is this vulnerability?

An improper input validation flaw was found in the eBPF subsystem in the Linux kernel. The issue occurs due to a lack of proper validation of dynamic pointers within user-supplied eBPF programs prior to executing them. This may allow an attacker with CAP_BPF privileges to escalate privileges and execute arbitrary code in the context of the kernel.

02Affected products

VendorProductVersions
Red HatRed Hat Enterprise Linux 90:5.14.0-362.8.1.el9_3
Red HatRed Hat Enterprise Linux 90:5.14.0-362.8.1.el9_3
Red HatRed Hat Enterprise Linux 9.2 Extended Update Support0:5.14.0-284.48.1.el9_2
Red HatRed Hat Enterprise Linux 9.2 Extended Update Support0:5.14.0-284.48.1.rt14.333.el9_2
Red HatRed Hat Enterprise Linux 9.2 Extended Update Supportunspecified
Red HatRed Hat Enterprise Linux 6unspecified
Red HatRed Hat Enterprise Linux 7unspecified
Red HatRed Hat Enterprise Linux 7unspecified
Red HatRed Hat Enterprise Linux 8unspecified
Red HatRed Hat Enterprise Linux 8unspecified
Red HatRed Hat Enterprise Linux 9unspecified

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

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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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

09References

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