High [CVE-2026-87962] Denial of Service via unvalidated length fields
This high-severity Red Hat Linux advisory covers CVE-2026-87962 affecting Red Hat Fuse 7, Red Hat Offline Knowledge Portal.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
A flaw was found in t-digest. A remote attacker could exploit a denial of service vulnerability in the `MergingDigest.fromBytes` function by providing specially crafted serialized data.
This data, with unvalidated length and capacity fields, can cause the parsing thread to abort due to an `ArrayIndexOutOfBoundsException` or `NegativeArraySizeException`, leading to a denial of service.
The MergingDigest.fromBytes() method does not validate length fields in serialized input, allowing an attacker to cause excessive memory allocation or out-of-bounds reads, resulting in a Denial of Service. This is exploitable when deserializing untrusted t-digest data received over the network.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-125.
Affected Red Hat products: Red Hat Fuse 7; Red Hat Offline Knowledge Portal. Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 50 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 50 minutes ago·verify at source
Mitigation checklist
- Apply the upstream fix. As a workaround, ensure that t-digest serialized data is only accepted from trusted sources and not exposed to untrusted network input.
Official advisory · high-confidence parse· fetched 50 minutes ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.