CVE-2024-27308: mio_project mio Use After Free
Vulnerability summary
CVE-2024-27308 is a critical (CVSS 9.1) Use After Free vulnerability in mio_project mio. EPSS estimates a 0.88% chance of exploitation in the next 30 days, higher than 58.4% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 0 · Related 7Timeline
- 06-03-2024PublishedVulnerability first disclosed.
- 27-08-2024Last modifiedVulnerability information updated.
Description
Mio is a Metal I/O library for Rust. When using named pipes on Windows, mio will under some circumstances return invalid tokens that correspond to named pipes that have already been deregistered from the mio registry. The impact of this vulnerability depends on how mio is used. For some applications, invalid tokens may be ignored or cause a warning or a crash. On the other hand, for applications that store pointers in the tokens, this vulnerability may result in a use-after-free. For users of Tokio, this vulnerability is serious and can result in a use-after-free in Tokio. The vulnerability is Windows-specific, and can only happen if you are using named pipes. Other IO resources are not affected. This vulnerability has been fixed in mio v0.8.11. All versions of mio between v0.7.2 and v0.8.10 are vulnerable. Tokio is vulnerable when you are using a vulnerable version of mio AND you are using at least Tokio v1.30.0. Versions of Tokio prior to v1.30.0 will ignore invalid tokens, so they are not vulnerable. Vulnerable libraries that use mio can work around this issue by detecting and ignoring invalid tokens.
CVSS metrics
5 scores · 5 sources · 1 version- CVE.orgCNA7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NDiffers
- OSV · WolfiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NDiffers
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NDiffers
- OSV · Crates.ioEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NDiffers
EPSS trend
Probability
0.88%
Chance of exploitation in the next 30 days
Percentile
58%
Versus all other CVEs
30-day change
-0.01 pp
From 0.89% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
- CWE-672Operation on a Resource after Expiration or ReleaseThe product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked.
Affected systems
Chainguard15 products
- berg< 0.3.5-r2
- cargo-audit< 0.21.2-r1
- kdash< 0.6.1-r4
- linkerd-network-validator< 0.1.2-r2
- pgcat< 1.2.0-r1
Wolfi15 products
- berg< 0.3.5-r2
- cargo-audit< 0.21.2-r1
- kdash< 0.6.1-r4
- linkerd-network-validator< 0.1.2-r2
- pgcat< 1.2.0-r1
Crates.Io1 product
- mio≥ 0.7.2, < 0.8.11
Mio_project1 product
- mio≥ 0.7.2, ≤ 0.8.10
Tokio1 product
- tokio≥ 1.30.0 (No fix recorded)
Tokio-rs1 product
- mio≥ 0.7.2, < 0.8.11
6 vendors · 34 products
References
9 links- github.com/tokio-rs/mio/security/advisories/GHSA-r8w9-5wcg-vfj7X Refsource CONFIRMAdvisoryWEBVendor Advisory
- github.com/tokio-rs/mioPACKAGE
- crates.io/crates/mioPACKAGE