Kernel memory exhaustion via malformed ebtables blob
Published Apr 28, 2024 · Updated May 11, 2026
Memory leakage in the Linux kernel ebtables component allows local users to exhaust kernel memory by submitting a malformed table blob. In do_replace_finish(), a valid_hooks mismatch branches to free_unlock without setting ret to -EINVAL, so the failed replacement follows an incorrect result path and leaves allocated state unreleased. Local access with permission to replace an ebtables table is required; repeated malformed replacements can deplete memory and interrupt service.
Summary
What happened
Memory leakage in the Linux kernel ebtables component allows local users to exhaust kernel memory by submitting a malformed table blob. In do_replace_finish(), a valid_hooks mismatch branches to free_unlock without setting ret to -EINVAL, so the failed replacement follows an incorrect result path and leaves allocated state unreleased. Local access with permission to replace an ebtables table is required; repeated malformed replacements can deplete memory and interrupt service.
The record
- CVE
- CVE-2022-48641
- Published
- Apr 28, 2024
- Updated
- May 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-401, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 28, 2024CVE publishedPublication date reported by the CVE source.
- May 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=160c4eb47db03b96c0c425358e7595ebefe8094d <11ebf32fde46572b0aaf3c2bdd97d923ef5a03ab
- Affected versionversion=1b2c5428f773d60c116c7b1e390432e0cfb63cd6 <d5917b7af7cae0e2804f9d127a03268035098b7f
- Affected versionversion=358765beb836f5fc2ed26b5df4140d5d3548ac11 <1e98318af2f163eadaff815abcef38d27ca92c1e
- Affected versionversion=4.14.292 <4.14.295
- Affected versionversion=4.19.257 <4.19.260
- Affected versionversion=5.10.140 <5.10.146
- Affected versionversion=5.15.64 <5.15.71
- Affected versionversion=5.19.6 <5.19.12
- Affected versionversion=5.4.212 <5.4.215
- Affected versionversion=624c30521233e110cf50ba01980a591e045036ae <ebd97dbe3c55d68346b9c5fb00634a7f5b10bbee
- Affected versionversion=7997eff82828304b780dc0a39707e1946d6f1ebf <62ce44c4fff947eebdf10bb582267e686e6835c9
- Affected versionversion=afd01382594d643e1adeb16826423b418cdf8b8b <754e8b74281dd54a324698803483f47cf3355ae1
- Affected versionversion=e53cfa017bf4575d0b948a8f45313ef66d897136 <38cf372b17f0a5f35c1b716a100532d539f0eb33
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo