CVE catalog

CVE-2025-11233

rustc: CVE-2025-11233

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Published: Oct 1, 2025, 4:49:50 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.52% · Oct 25, 2026

Starting from Rust 1.87.0 and before Rust 1.89.0, the tier 3 Cygwin target (`x86_64-pc-cygwin`) didn't correctly handle path separators, causing the standard library's Path API to ignore path components separated by backslashes. Due to this, programs compiled for Cygwin that validate paths could misbehave, potentially allowing path traversal attacks or malicious filesystem operations. Rust 1.89.0 fixes the issue by handling both Win32 and Unix style paths in the standard library for the Cygwin target. While we assess the severity of this vulnerability as "medium", please note that the tier 3 Cygwin compilation target is only available when building it from source: no pre-built binaries are distributed by the Rust project, and it cannot be installed through Rustup. Unless you manually compiled the `x86_64-pc-cygwin` target you are not affected by this vulnerability. Users of the tier 1 MinGW target (`x86_64-pc-windows-gnu`) are also explicitly not affected.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	rustc	sid	`1.97.1+dfsg1-1`	fixed
Debian	rustc	forky	`1.97.1+dfsg1-1`	fixed
Debian	rustc	trixie	`1.85.1+dfsg1-1+deb13u1`	not affected
Debian	rustc	bookworm	`1.63.0+dfsg1-2`	not affected
Ubuntu	rustc-1.88	25.10	`1.88.0+dfsg0ubuntu1-0ubuntu1`	vulnerable
Ubuntu	rustc-1.88	25.10	`1.88.0+dfsg0ubuntu1-0ubuntu2`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	rustc	source	sid	`1.89.0+dfsg1-1`	not yet assigned	Not reported	Not reported
Debian	rustc	source	forky	`1.89.0+dfsg1-1`	not yet assigned	Not reported	Not reported
Debian	rustc	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	rustc	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libstd-rust-1.63]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · amd64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · arm64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[libstd-rust-dev]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · amd64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · arm64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[libstd-rust-dev-wasm32]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[libstd-rust-dev-windows]Not affected
Source package: [rustc]
Details (1)
- 1.63.0+dfsg1-2 · amd64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[rust-all]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[rustc]Not affected
Details (2)
- 1.63.0+dfsg1-2 · amd64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · arm64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[rust-clippy]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · amd64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · arm64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[rust-doc]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[rustfmt]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · amd64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · arm64 · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[rust-gdb]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[rust-lldb]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
[rust-src]Not affected
Source package: [rustc]
Details (2)
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm
- 1.63.0+dfsg1-2 · all · bookworm
  Not affected
  dsa · rustc · debian · bookworm

Observed: Oct 24, 2026, 5:30:25 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]