CVE-2025-55159
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
CVE-2025-55159 NameCVE-2025-55159 Descriptionslab 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…
Workaround
for this issue involves to avoid using get_disjoint_mut with indices that might be beyond the slab's actual length. SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) Vulnerable and fixed packages The table below lists information on source packages. Source PackageReleaseVersionStatus rust-slab (PTS)bullseye0.4.1-1fixed bookworm0.4.4-1fixed trixie0.4.9-1fixed forky, sid0.4.12-1fixed The information below is based on the following data on fixed versions. PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs rust-slabsource(unstable)(not affected) Notes - rust-slab <not-affected> (Vulnerable code not present) https://github.com/tokio-rs/slab/security/advisories/GHSA-qx2v-8332-m4fv https://github.com/tokio-rs/slab/pull/152 Introduced by: https://github.com/tokio-rs/slab/commit/f801afe5cb2379b0178173758273a95f64510527 (v0.4.10) Fixed by: https://github.com/tokio-rs/slab/commit/2d65c514bc964b192bab212ddf3c1fcea4ae96b8 (v0.4.11)
CVE-2025-55159
| Name | CVE-2025-55159 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| rust-slab (PTS) | bullseye | 0.4.1-1 | fixed |
| bookworm | 0.4.4-1 | fixed | |
| trixie | 0.4.9-1 | fixed | |
| forky, sid | 0.4.12-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| rust-slab | source | (unstable) | (not affected) |
Notes
- rust-slab <not-affected> (Vulnerable code not present)
https://github.com/tokio-rs/slab/security/advisories/GHSA-qx2v-8332-m4fv
https://github.com/tokio-rs/slab/pull/152
Introduced by: https://github.com/tokio-rs/slab/commit/f801afe5cb2379b0178173758273a95f64510527 (v0.4.10)
Fixed by: https://github.com/tokio-rs/slab/commit/2d65c514bc964b192bab212ddf3c1fcea4ae96b8 (v0.4.11)
Apply commands
- rust-slab <not-affected> (Vulnerable code not present)https://github.com/tokio-rs/slab/security/advisories/GHSA-qx2v-8332-m4fvhttps://github.com/tokio-rs/slab/pull/152Introduced by: https://github.com/tokio-rs/slab/commit/f801afe5cb2379b0178173758273a95f64510527 (v0.4.10)Fixed by: https://github.com/tokio-rs/slab/commit/2d65c514bc964b192bab212ddf3c1fcea4ae96b8 (v0.4.11)OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 0 |
| debian | sid | fixed | 0 |
| debian | trixie | fixed | 0 |
References
- https://github.com/tokio-rs/slab/security/advisories/GHSA-qx2v-8332-m4fv
- https://www.suse.com/security/cve/CVE-2025-55159.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-55159
- https://github.com/tokio-rs/slab/pull/152
- https://github.com/tokio-rs/slab/commit/2d65c514bc964b192bab212ddf3c1fcea4ae96b8
- https://github.com/tokio-rs/slab
- https://rustsec.org/advisories/RUSTSEC-2025-0047.html
- https://crates.io/crates/slab
- https://security-tracker.debian.org/tracker/CVE-2025-55159
Community-verified mitigations for this CVE will appear above when contributors publish them.
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