CVE-2026-87823
zstd-jni 1.1.1 through 1.5.7-13 Out-of-Bounds Read via Direct ByteBuffer Frame-Size Methods
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
zstd-jni 1.1.1 through 1.5.7-13 Out-of-Bounds Read via Direct ByteBuffer Frame-Size Methods
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.
- Record
CVE-2026-87823- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H - Weakness
- CWE-190
- Updated
- 2026-11-02
EUVDEUVD-2026-75021
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.
- Record
EUVD-2026-75021- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-cm3p-487m-cmvq
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame...
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.
- Record
GHSA-cm3p-487m-cmvq- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H - Weakness
- CWE-190
- Updated
- 2026-11-02
NVD
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.
- Record
CVE-2026-87823- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H - Weakness
- CWE-190
- Updated
- 2026-11-02
OSV
zstd-jni 1.1.1 through 1.5.7-13 Out-of-Bounds Read via Direct ByteBuffer Frame-Size Methods
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.
- Record
CVE-2026-87823- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-190
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-87823
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.
- Record
DEBIAN-CVE-2026-87823- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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
Show 5 moreShow less
OSVUBUNTU-CVE-2026-87823
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.
- Record
UBUNTU-CVE-2026-87823- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H - Updated
- 2026-11-02
OSVopenSUSE-SU-2026:11769-1 No score
zstd-jni-1.5.7.16-1.1 on GA media
These are all security issues fixed in the zstd-jni-1.5.7.16-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:11769-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2026:21902-1 No score
Security update for zstd-jni
This update for zstd-jni fixes the following issues:
- CVE-2026-87823: denial of Service or Information Disclosure via out-of-bounds read (bsc#1279953).
- CVE-2026-87824: denial of Service (DoS) via out-of-bounds read in Zstd.trainFromBufferDirect (bsc#1279956).
- CVE-2026-87825: use-after-free resulting in silent data corruption or JVM crashes (bsc#1279955).
- CVE-2026-87877: use-After-Free vulnerability allows memory corruption and denial of service (bsc#1279954).
Changes for zstd-jni:
- update to version v1.5.7.16.
- Record
openSUSE-SU-2026:21902-1- Updated
- 2026-11-02
OSVSUSE-SU-2026:23858-1 No score
Security update for zstd-jni
This update for zstd-jni fixes the following issues:
- CVE-2026-87823: denial of Service or Information Disclosure via out-of-bounds read (bsc#1279953).
- CVE-2026-87824: denial of Service (DoS) via out-of-bounds read in Zstd.trainFromBufferDirect (bsc#1279956).
- CVE-2026-87825: use-after-free resulting in silent data corruption or JVM crashes (bsc#1279955).
- CVE-2026-87877: use-After-Free vulnerability allows memory corruption and denial of service (bsc#1279954).
Changes for zstd-jni:
- update to version v1.5.7.16.
- Record
SUSE-SU-2026:23858-1- Updated
- 2026-11-02
OSVSUSE-SU-2026:23868-1 No score
Security update for zstd-jni
This update for zstd-jni fixes the following issues:
- CVE-2026-87823: denial of Service or Information Disclosure via out-of-bounds read (bsc#1279953).
- CVE-2026-87824: denial of Service (DoS) via out-of-bounds read in Zstd.trainFromBufferDirect (bsc#1279956).
- CVE-2026-87825: use-after-free resulting in silent data corruption or JVM crashes (bsc#1279955).
- CVE-2026-87877: use-After-Free vulnerability allows memory corruption and denial of service (bsc#1279954).
Changes for zstd-jni:
- update to version v1.5.7.16.
- Record
SUSE-SU-2026:23868-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
zstd-jni-javaDebian:12 |
All versions, plus listed versions 1.5.2-5+ds-31.5.2-5+ds-41.5.2-5+ds-51.5.2-5+ds-61.5.2-5+ds-7 Show 9 moreShow less1.5.2-5+ds-81.5.4-2+ds-11.5.4-2+ds-21.5.4-2+ds-3~exp11.5.4-2+ds-3~exp21.5.4-2+ds-3~exp31.5.4-2+ds-3~exp41.5.7-23+ds-11.5.7-23+ds-2 |
None known |
zstd-jni-javaDebian:13 |
All versions, plus listed versions 1.5.2-5+ds-71.5.2-5+ds-81.5.4-2+ds-11.5.4-2+ds-21.5.4-2+ds-3~exp1 Show 5 moreShow less1.5.4-2+ds-3~exp21.5.4-2+ds-3~exp31.5.4-2+ds-3~exp41.5.7-23+ds-11.5.7-23+ds-2 |
None known |
zstd-jni-javaDebian:14 |
before 1.5.7-23+ds-1, plus listed versions 1.5.2-5+ds-71.5.2-5+ds-81.5.4-2+ds-11.5.4-2+ds-21.5.4-2+ds-3~exp11.5.4-2+ds-3~exp21.5.4-2+ds-3~exp31.5.4-2+ds-3~exp4 |
1.5.7-23+ds-1 |
zstd-jniSUSE:Linux Enterprise Server 16.0 From an advisory covering 4 CVEs |
before 1.5.7.16-160000.1.1 | 1.5.7.16-160000.1.1 |
zstd-jniSUSE:Linux Enterprise Server for SAP applications 16.0 From an advisory covering 4 CVEs |
before 1.5.7.16-160000.1.1 | 1.5.7.16-160000.1.1 |
zstd-jni-javaUbuntu:24.04:LTS |
All versions, plus listed versions 1.5.2-5+ds-31.5.2-5+ds-3build1 |
None known |
zstd-jni-javaUbuntu:26.10 |
All versions, plus listed versions 1.5.2-5+ds-8 |
None known |
zstd-jni-javaUbuntu:26.04:LTS |
All versions, plus listed versions 1.5.2-5+ds-71.5.2-5+ds-7build11.5.2-5+ds-7ubuntu11.5.2-5+ds-8 |
None known |
zstd-jniopenSUSE:Tumbleweed From an advisory covering 2 CVEs |
before 1.5.7.16-1.1 | 1.5.7.16-1.1 |
zstd-jniopenSUSE:Leap 16.0 From an advisory covering 4 CVEs |
before 1.5.7.16-160000.1.1 | 1.5.7.16-160000.1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-87823 is a high vulnerability (CVSS 8.8) in Luben Zstd-jni, published September 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. Fixed in zstd-jni-java 1.5.7-23+ds-1.
References
github.com/luben/zstd-jni/security/advisories/GHSA-jfr6-9xqw-2g2q
Show 19 moreShow less
vulncheck.com/advisories/zstd-jni-1.1.1-through-1.5.7-13-out-of-bounds-read-via-direct-bytebuffer-frame-size-methods
nvd.nist.gov/vuln/detail/CVE-2026-87823
repo1.maven.org/maven2/com/github/luben/zstd-jni
security-tracker.debian.org/tracker/CVE-2026-87823
suse.com/support/update/announcement/2026/suse-su-202623858-1
bugzilla.suse.com/1279953
ubuntu.com/security/CVE-2026-87823
cve.org/CVERecord?id=CVE-2026-87823