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CVE-2026-14684

HdrHistogram AbstractHistogram.java memory allocation

4.8 MediumFix availableDisputed

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

0.16%Unchanged since Jul 5, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.8

HdrHistogram AbstractHistogram.java memory allocation

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.

Record
CVE-2026-14684
CVSS 4.0
4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
CVSS 3.0
3.3 LowCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
CVSS 2.0
1.7 AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR
Weakness
CWE-789, CWE-400
Updated
2026-11-02
EUVDEUVD-2026-41706 4.8

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.

Record
EUVD-2026-41706
CVSS 4.0
4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Updated
2026-11-02
GitHub AdvisoriesGHSA-5846-q349-47qp 1.9

A flaw has been found in HdrHistogram up to 2.2.2. This affects the function org.HdrHistogram...

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 project was informed of the problem early through an issue report but has not responded yet.

Record
GHSA-5846-q349-47qp
CVSS 4.0
1.9 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-400
Updated
2026-11-02
NVD 1.9

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.

Record
CVE-2026-14684
CVSS 4.0
1.9 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0
1.7 LowAV:L/AC:L/Au:S/C:N/I:N/A:P
Weakness
CWE-400, CWE-789
Updated
2026-11-02
OSV 1.9

HdrHistogram AbstractHistogram.java memory allocation

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.

Record
CVE-2026-14684
CVSS 4.0
1.9 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Weakness
CWE-400, CWE-789
Updated
2026-11-02
OSVDEBIAN-CVE-2026-14684 1.9

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.

Record
DEBIAN-CVE-2026-14684
CVSS 4.0
1.9 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVRHSA-2026:26989 5.0

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:26989
CVSS 3.1
5.0 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2026:34975 8.1

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:34975
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-14684 1.9

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.

Record
UBUNTU-CVE-2026-14684
CVSS 4.0
1.9 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02

Affected packages

Affected packages
PackageAffectedFixed
hdrhistogram
Debian:12
 All versions, plus listed versions
2.1.11-12.2.2-1
 None known
hdrhistogram
Debian:13
 All versions, plus listed versions
2.1.11-12.2.2-1
 None known
hdrhistogram
Debian:14
 before 2.2.2-1, plus listed versions
2.1.11-1
2.2.2-1
netavark
Red Hat:hummingbird:1
From an advisory covering 4 CVEs
 before 0:2.0.0-1.hum1
0:2.0.0-1.hum1
netavark-tests
Red Hat:hummingbird:1
From an advisory covering 4 CVEs
 before 0:2.0.0-1.hum1
0:2.0.0-1.hum1
cargo
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
clippy
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-analyzer
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-debugger-common
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
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Affected packages
PackageAffectedFixed
rust-doc
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-gdb
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-lldb
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-src
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-std-static
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-std-static-aarch64-unknown-none-softfloat
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-std-static-aarch64-unknown-uefi
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-std-static-i686-pc-windows-gnu
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-std-static-wasm32-unknown-unknown
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-std-static-wasm32-wasip1
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-std-static-x86_64-pc-windows-gnu
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-std-static-x86_64-unknown-none
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rust-std-static-x86_64-unknown-uefi
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
rustfmt
Red Hat:hummingbird:1
From an advisory covering 24 CVEs
 before 0:1.96.1-1.hum1
0:1.96.1-1.hum1
hdrhistogram
Ubuntu:18.04:LTS
 All versions, plus listed versions
2.1.10-1
 None known
hdrhistogram
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.1.11-1
 None known
hdrhistogram
Ubuntu:22.04:LTS
 All versions, plus listed versions
2.1.11-1
 None known
hdrhistogram
Ubuntu:24.04:LTS
 All versions, plus listed versions
2.1.11-1
 None known
hdrhistogram
Ubuntu:25.10
 All versions, plus listed versions
2.1.11-1
 None known
hdrhistogram
Ubuntu:26.10
 All versions, plus listed versions
2.1.11-1build12.2.2-1
 None known
hdrhistogram
Ubuntu:26.04:LTS
 All versions, plus listed versions
2.1.11-12.1.11-1build1
 None known

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-14684 is a medium vulnerability (CVSS 4.8) in hdrhistogram, published July 4, 2026. Its validity is disputed. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 5th percentile. Fixed in hdrhistogram 2.2.2-1.

References

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