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12 lines
748 B
Markdown
12 lines
748 B
Markdown
# DirtyDecrypt / DirtyCBC
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DirtyDecrypt, also known as DirtyCBC, is a variant of CopyFail / DirtyFrag / Fragnesia. We found and reported this on [May 9, 2026](https://x.com/v12sec/status/2053029838995263854), but was informed it was a duplicate by the maintainers. We're releasing it now since it's patched on mainline. It's a rxgk pagecache write due to missing COW guard in rxgk_decrypt_skb. See `poc.c` for more details.
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DirtyDecrypt was discovered autonomously with [V12](https://v12.sh) by Aaron Esau of the [V12 security team](https://x.com/v12sec).
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> Want to find issues like this in your own code? Try V12 at [v12.sh](https://v12.sh).
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```
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$ sha256sum ./poc.c
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8054e424466ed2c353b94fb25643e17bef50b31be95038e1c700156357e2d74b ./poc.c
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```
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