CVE-2026-87823Patch

LOWCVSS 8.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

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0.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-190

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

Patch or workaround signal is available
1 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 1 signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Patch

1100.0%

Full discourse1 post

DFIR Lab@DFIR_Lab46d
Patch
🚨 HIGH SEVERITY: CVE-2026-87823 (CVSS 8.2) zstd-jni <1.5.7-14 vulnerable to out-of-bounds memory reads via integer overflow. Attackers can crash JVM or extract memory data using negative offsets. Patch immediately to 1.5.7-14+ #CVE #Vulnerability #PatchNow https://t.co/CA12JHgUjz
Post summary
The tweet announces CVE-2026-87823 in zstd-jni, details its out‑of‑bounds memory read flaw and urges users to upgrade to version 1.5.7‑14+ immediately.
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134 followersView on X

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