CVE-2026-77639
Description
A flaw was found in Tor. A remote attacker could exploit a compression bomb bypass vulnerability by concatenating multiple gzip or zlib sub-streams. Each sub-stream, individually below the detection threshold, could collectively bypass the compression bomb check, leading to a Denial of Service (DoS) condition.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Amplification; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory)
System resources, CPU and memory, can be quickly consumed. This can lead to poor system performance or system crash.
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