PT-2026-137151
CVE-2026-122129
·
Published
2026-11-04
·
Updated
2026-11-05
Description by
CVSS 4.0
6.9
MediumMetricsAV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
Name of the Vulnerable Software and Affected Versions
CESNET ipfixcol2 versions 2.7.1 through 2.8.x
Description
An issue exists in the
Lz4Decoder::read start header() function where unauthenticated attackers can cause memory exhaustion. By opening TCP connections and sending LZ4 start headers with unbounded ring buffer sizes, an attacker can force allocations of up to 4 GiB per connection, resulting in a denial of service for the collector.Recommendations
Update to version 2.9.0.
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