CVE-2026-92612: Eclipse iceoryx2 Use-After-Free Vulnerability

CVE-2026-92612 Overview

CVE-2026-92612 affects Eclipse iceoryx2, a Rust-based zero-copy inter-process communication library, in versions greater than v0.8.0. The StaticString type exposes its internal buffer as mutable bytes through safe application programming interfaces (APIs). The String::as_str() method then converts those bytes into a Rust string slice (&str) without validating UTF-8 encoding. An application can construct an invalid &str and trigger undefined behavior using only safe Rust code. This weakness is classified under [CWE-749: Exposed Dangerous Method or Function].

Critical Impact
Safe Rust code can produce an invalid &str, breaking a core language soundness invariant and causing undefined behavior in downstream consumers.

Affected Products

Eclipse iceoryx2 versions greater than v0.8.0
iceoryx2-bb-container crate prior to 0.10.0
Applications embedding iceoryx2 StaticString for inter-process messaging

Discovery Timeline

2026-09-21 - CVE-2026-92612 published to the National Vulnerability Database (NVD)
2026-09-21 - Last updated in NVD database

Technical Details for CVE-2026-92612

Vulnerability Analysis

The defect lives in the StaticString container from iceoryx2-bb-container. In Rust, &str carries a soundness invariant: its underlying bytes must be valid UTF-8. The Rust standard library relies on this invariant when iterating, slicing, and formatting strings.

StaticString exposes its backing buffer as mutable bytes through safe APIs. A caller can therefore overwrite the buffer with arbitrary byte sequences, including invalid UTF-8. The as_str() conversion then hands out a &str referencing those bytes without any validation step.

Downstream code that receives the returned slice can trigger undefined behavior. Impact scenarios include out-of-bounds reads during character boundary calculations, incorrect indexing, and panics inside standard library routines that assume valid UTF-8.

Root Cause

The root cause is a violated API contract. Safe Rust guarantees that constructing a &str requires validated UTF-8, yet StaticString circumvents this guarantee by pairing mutable byte access with an unchecked conversion. The combination effectively exposes an unsafe operation through a safe interface, matching the pattern described by [CWE-749].

Attack Vector

Exploitation requires local access with high privileges and active user interaction. An attacker must control code that writes into the StaticString buffer and then passes the resulting &str to code paths that assume UTF-8 validity. The vulnerability does not enable remote code execution and does not affect confidentiality. It does introduce limited integrity and availability impact through undefined behavior in Rust consumers. See the GitHub Security Advisory GHSA-8mq4-3mwq-qvg6 for full technical detail.

Detection Methods for CVE-2026-92612

Indicators of Compromise

Application crashes or panics originating in Rust standard library string routines when processing data received through iceoryx2 channels
Unexpected termination of processes that call StaticString::as_str() on attacker-influenced buffers
Non-UTF-8 byte sequences observed in shared-memory segments used for iceoryx2 messaging

Detection Strategies

Audit dependency manifests (Cargo.toml, Cargo.lock) for iceoryx2 and iceoryx2-bb-container versions greater than v0.8.0 and below 0.10.0
Use cargo audit with an updated advisory database to flag vulnerable crate versions
Perform source review for direct usage of StaticString::as_mut_bytes followed by as_str() conversions without explicit UTF-8 validation

Monitoring Recommendations

Enable core dump collection and stack traces for services depending on iceoryx2 to identify panics inside core::str functions
Track supply-chain inventory to detect newly introduced vulnerable versions during build pipelines
Monitor process crash telemetry for repeated failures in iceoryx2 subscribers or publishers

How to Mitigate CVE-2026-92612

Immediate Actions Required

Upgrade iceoryx2-bb-container to version 0.10.0 or later, referenced in the iceoryx2-bb-container 0.10.0 Release
Upgrade Eclipse iceoryx2 to the fixed release documented in GitHub Release v0.10.0
Rebuild and redeploy any downstream binaries that statically link the vulnerable crate versions
Review internal code that consumes StaticString values across trust boundaries

Patch Information

Eclipse released the fix in iceoryx2 v0.10.0. The corresponding iceoryx2-bb-container crate is published on crates.io at version 0.10.0. Refer to the GitLab CVE Assignment Work Item for coordination details.

Workarounds

Validate byte content with std::str::from_utf8 before treating any StaticString output as a &str
Restrict which components may write into shared StaticString buffers by tightening process privileges
Wrap StaticString access behind a project-local adapter that performs UTF-8 validation on every read

bash

# Update the vulnerable dependency to the patched release
cargo update -p iceoryx2-bb-container --precise 0.10.0
cargo update -p iceoryx2 --precise 0.10.0
cargo audit