# CVE-2025-55159: slab allows out-of-bounds access in `get_disjoint_mut` due to incorrect bounds check > Attackers can trigger undefined behavior or crashes in applications using the slab library by exploiting an incorrect bounds check in get_disjoint_mut. - **Severity:** Medium 5.1 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 11 Aug 2025 - **Updated:** 12 Aug 2025 - **Also known as:** AZL-74897, GHSA-qx2v-8332-m4fv, OESA-2026-2817, OESA-2026-2818, OESA-2026-2819, OESA-2026-3047, RUSTSEC-2025-0047, SUSE-RU-2025:4131-1, SUSE-SU-2025:02957-1, SUSE-SU-2025:02961-1, SUSE-SU-2025:02962-1, SUSE-SU-2025:20921-1, SUSE-SU-2025:3944-1, SUSE-SU-2025:3955-1, SUSE-SU-2026:20686-1, UBUNTU-CVE-2025-55159, openSUSE-SU-2025:15444-1, openSUSE-SU-2025:15445-1, openSUSE-SU-2025:15446-1, openSUSE-SU-2025:15461-1, openSUSE-SU-2025:15470-1, openSUSE-SU-2025:15475-1, openSUSE-SU-2025:15480-1, openSUSE-SU-2025:15492-1, openSUSE-SU-2025:15497-1, openSUSE-SU-2025:15554-1, openSUSE-SU-2025:20013-1, openSUSE-SU-2026:10496-1, openSUSE-SU-2026:11324-1, openSUSE-SU-2026:12171-1, openSUSE-SU-2026:20329-1 ## What is CVE-2025-55159? CVE-2025-55159 is a medium-severity memory corruption vulnerability in tokio-rs slab, published on 11 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim. ### Official description slab is a pre-allocated storage for a uniform data type. In version 0.4.10, the get_disjoint_mut method incorrectly checked if indices were within the slab's capacity instead of its length, allowing access to uninitialized memory. This could lead to undefined behavior or potential crashes. This has been fixed in slab 0.4.11. A workaround for this issue involves to avoid using get_disjoint_mut with indices that might be beyond the slab's actual length. Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) ## Which versions are affected by CVE-2025-55159? 3 open source packages ship an affected version, including slab. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `slab` | crates.io | From 0.4.10 | 0.4.11 | | `slab` | crates.io | From 0.4.10 | 0.4.11 | | `slab` | crates.io | From 0.4.10 | 0.4.11 | | `rust-keylime` | SUSE:Linux Enterprise Micro 5.3 | All versions | 0.2.8+12-150400.3.10.1 | | `rust-keylime` | SUSE:Linux Enterprise Micro 5.4 | All versions | 0.2.8+12-150400.3.8.1 | | `rust-keylime` | SUSE:Linux Enterprise Micro 5.5 | All versions | 0.2.8+12-150500.3.8.1 | | `SLES16-Migration` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 2.1.26-15.22.4 | | `python-Cerberus` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 1.3.2-150700.20.2.10 | | `suse-migration-services` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 2.1.26-150700.16.12.1 | | `suse-migration-sle16-activation` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 2.1.26-150700.15.9.1 | | `wicked2nm` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 1.4.0-150700.15.7.2 | | `sccache` | SUSE:Linux Enterprise Module for Development Tools 15 SP6 | All versions | 0.4.2~4-150600.10.6.1 | | `sccache` | SUSE:Linux Enterprise Module for Development Tools 15 SP7 | All versions | 0.4.2~4-150600.10.6.1 | | `SLES16-SAP_Migration` | SUSE:Linux Enterprise Module for SAP Applications 15 SP7 | All versions | 2.1.26-15.14.4 | | `flake-pilot` | SUSE:Linux Enterprise Server 16.0 | All versions | 3.1.22-160000.1.1 | | `flake-pilot` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 3.1.22-160000.1.1 | | `gstreamer` | SUSE:Linux Micro 6.2 | All versions | 1.26.7-160000.1.1 | | `gstreamer-plugins-base` | SUSE:Linux Micro 6.2 | All versions | 1.26.7-160000.1.1 | | `sccache` | openSUSE:Leap 15.6 | All versions | 0.4.2~4-150600.10.6.1 | | `flake-pilot` | openSUSE:Leap 16.0 | All versions | 3.1.22-160000.1.1 | | `gstreamer` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.1.1 | | `gstreamer-devtools` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.1.1 | | `gstreamer-docs` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.1.1 | | `gstreamer-plugins-bad` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.1.1 | | `gstreamer-plugins-base` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.1.1 | | `gstreamer-plugins-good` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.1.1 | | `gstreamer-plugins-libav` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.1.1 | | `gstreamer-plugins-rs` | openSUSE:Leap 16.0 | All versions | 1.26.7+git0.6ab75814-160000.1.1 | | `gstreamer-plugins-ugly` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.1.1 | | `gstreamer-rtsp-server` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.1.1 | | `ab-av1` | openSUSE:Tumbleweed | All versions | 0.11.7-1.1 | | `afterburn` | openSUSE:Tumbleweed | All versions | 5.10.0.git73.b97f772-2.1 | | `aws-efs-utils` | openSUSE:Tumbleweed | All versions | 2.3.3-1.1 | | `flake-pilot` | openSUSE:Tumbleweed | All versions | 3.1.21-1.1 | | `fractal` | openSUSE:Tumbleweed | All versions | 12.0-3.1 | | `framework_tool` | openSUSE:Tumbleweed | All versions | 0.4.5-2.1 | | `git-cliff` | openSUSE:Tumbleweed | All versions | 2.12.0-1.1 | | `gstreamer-devtools` | openSUSE:Tumbleweed | All versions | 1.26.5-1.1 | | `gstreamer-plugins-rs` | openSUSE:Tumbleweed | All versions | 1.26.5+git11.949807a4-1.1 | | `rust-keylime` | openSUSE:Tumbleweed | All versions | 0.2.8+12-1.1 | ## How do I fix CVE-2025-55159? Upgrade slab to 0.4.11 or later. ## Is CVE-2025-55159 being exploited? There is no known exploitation of CVE-2025-55159 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2025-55159 and fix it if it is affected. What it is: CVE-2025-55159 is a medium-severity memory corruption vulnerability in tokio-rs slab, published on 11 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2025-55159 in the wild and no public exploit code. Affected packages and fixed versions: - slab (crates.io): affected from 0.4.10; fixed in 0.4.11 - slab (crates.io): affected from 0.4.10; fixed in 0.4.11 - slab (crates.io): affected from 0.4.10; fixed in 0.4.11 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2025-55159/ (Markdown: https://insights.sbomify.com/CVE-2025-55159/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2025-55159 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-55159 - OSV: https://osv.dev/vulnerability/CVE-2025-55159 --- From sbomify Insights: https://insights.sbomify.com/CVE-2025-55159/ Summaries are generated and may contain mistakes; the official description above is the record.