Description
A flaw has been found in HdrHistogram up to 2.2.2. This affects the function org.HdrHistogram.AbstractHistogram.decodeFromByteBuffer of the file src/main/java/org/HdrHistogram/AbstractHistogram.java. This manipulation of the argument numberOfSignificantValueDigits causes uncontrolled memory allocation. The attack can only be executed locally. The exploit has been published and may be used. The actual existence of this vulnerability is currently in question. This issue is disputed due to the potential lack of crossing of security boundaries and the pre-requisites for a successful attack.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | HdrHistogram | 2.2.0, 2.2.1, 2.2.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | hdrhistogram | 2.2.2-1 | — |
| Debian 13 | hdrhistogram | No fix yet | — |
| Debian 12 | hdrhistogram | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | hdrhistogram | No fix yet | — |
| Ubuntu 26.04 LTS | hdrhistogram | No fix yet | — |
| Ubuntu 25.10 | hdrhistogram | No fix yet | — |
| Ubuntu 24.04 LTS | hdrhistogram | No fix yet | — |
| Ubuntu 22.04 LTS | hdrhistogram | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | hdrhistogram | No fix yet | — |
| Ubuntu 18.04 LTS | hdrhistogram | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | netavark +1 | 2.0.0-1.hum1 | RHSA-2026:26989 |
| Red Hat Hardened Images 1 | rust +18 | 1.96.1-1.hum1 | RHSA-2026:34975 |
Advisories 2
- RHSA-2026:34975 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:26989 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
References
- VDB-376280 | HdrHistogram AbstractHistogram.java memory allocation vdb-entry technical-description
- VDB-376280 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-14684 | CVE Analysis and Report third-party-advisory
- Submit #846754 | HdrHistogram 2.2.2 Denial of Service third-party-advisory
- https://github.com/HdrHistogram/HdrHistogram/issues/220 exploit issue-tracking
- https://github.com/HdrHistogram/HdrHistogram/ product