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CVE-2023-2163

Incorrect Verifier Branch Pruning Logic Leads To Arbitrary Read/Write In Linux Kernel and Lateral Privilege Escalation

HIGH
8.8
CVSS Score
Published: September 20, 2023 at 05:02 AM UTC
Updated: June 17, 2026 at 05:51 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 4%
SSVC
No known exploit

Description

Incorrect verifier pruning in BPF in Linux Kernel >=5.4 leads to unsafe code paths being incorrectly marked as safe, resulting in arbitrary read/write in kernel memory, lateral privilege escalation, and container escape.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.11 ≤ v < 5.15.1095.16 ≤ v < 6.1.265.3 ≤ v < 5.4.2425.5 ≤ v < 5.10.1796.2 ≤ v < 6.2.13
Affected range stops below 5.10.179, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.15.109, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 5.4 (unaffected)
Affected range stops below 5.4.242, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.26, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.2.13, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Mailing ListPatch
Source: [email protected]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=71b547f561247897a0a14f3082730156c0533fed
Source: af854a3a-2127-422b-91ae-364da2661108
https://bughunters.google.com/blog/6303226026131456/a-deep-dive-into-cve-2023-2163-how-we-found-and-fixed-an-ebpf-linux-kernel-vulnerability

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-682

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