[PR #2069] Fix out-of-bounds panic in GXF VBI parsing

**Original Pull Request:** https://github.com/CCExtractor/ccextractor/pull/2069 **State:** open **Merged:** No ---  **In raising this pull request, I confirm the following (please check boxes):** - [x] I have read and understood the [contributors guide](https://github.com/CCExtractor/ccextractor/blob/master/.github/CONTRIBUTING.md). - [x] I have checked that another pull request for this purpose does not exist. - [x] I have considered, and confirmed that this submission will be valuable to others. - [x] I accept that this submission may not be used, and the pull request closed at the will of the maintainer. - [x] I give this submission freely, and claim no ownership to its content. - [x] **I have mentioned this change in the [changelog](https://github.com/CCExtractor/ccextractor/blob/master/docs/CHANGES.TXT).** **My familiarity with the project is as follows (check one):** - [ ] I have never used CCExtractor. - [ ] I have used CCExtractor just a couple of times. - [ ] I absolutely love CCExtractor, but have not contributed previously. - [x] I am an active contributor to CCExtractor. --- ### Description In userdata.rs, the GXF VBI parser was using an old data length after moving through the bitstream, which could crash on some files. This update checks the actual remaining bits instead, keeping things safe and stopping those crashes.

claunia commented

2026-01-29 17:24:25 +00:00

Owner

Original Pull Request: https://github.com/CCExtractor/ccextractor/pull/2069

State: open
Merged: No

In raising this pull request, I confirm the following (please check boxes):

I have read and understood the contributors guide.
I have checked that another pull request for this purpose does not exist.
I have considered, and confirmed that this submission will be valuable to others.
I accept that this submission may not be used, and the pull request closed at the will of the maintainer.
I give this submission freely, and claim no ownership to its content.
I have mentioned this change in the changelog.

My familiarity with the project is as follows (check one):

I have never used CCExtractor.
I have used CCExtractor just a couple of times.
I absolutely love CCExtractor, but have not contributed previously.
I am an active contributor to CCExtractor.

Description

In userdata.rs, the GXF VBI parser was using an old data length after moving through the bitstream, which could crash on some files. This update checks the actual remaining bits instead, keeping things safe and stopping those crashes.

claunia added the pull-request label 2026-01-29 17:24:25 +00:00

[PR #2069] Fix out-of-bounds panic in GXF VBI parsing #2882

Description