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GHSA-6692-8qqf-79jc

Duplicate Advisory: `Read` on uninitialized buffer may cause UB ('tectonic_xdv' crate)

Withdrawn 2026-02-03. This finding no longer applies and is kept for reference. It is not used when checking packages.

Details

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-qwvx-c8j7-5g75. This link is maintained to preserve external references.

## Original Description Affected versions of this crate passes an uninitialized buffer to a user-provided `Read` implementation.

Arbitrary `Read` implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

The problem was fixed in commit `cdff034` by zero-initializing the buffer before passing it to a user-provided `Read` implementation.

Are you affected?

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Affected packages

crates.io/tectonic_xdv
Introduced in: 0Fixed in: 0.1.12

Upgrade tectonic_xdv to 0.1.12 or newer (ecosystem crates.io).

References