CVE-2026-80522 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution vendors, and users of Linux kernel versions 6.10 and earlier. They should verify Linux kernel versions for potential exposure, apply patches to address the vulnerability, and monitor system logs for suspicious activity.

Why it matters

The vulnerability in the Linux kernel's crypto: tegra component requires verification and patching to prevent potential crashes or unauthorized writes.

• Verify Linux kernel versions for potential exposure
• Apply patches to address the vulnerability
• Monitor system logs for suspicious activity
• Review system configurations for potential exposure

Technical summary

The vulnerability is in the crypto: tegra component of the Linux kernel, specifically in the tegra_gcm_do_one_req() function. The improper calculation of rctx->cryptlen could lead to a crash or a write beyond the rctx->dst_sg buffer during a decrypt operation if tegra_gcm_setauthsize() is not called. The fix involves modifying the tegra_gcm_do_one_req() function to perform the rctx->cryptlen calculation in the same way as tegra_ccm_crypt_init(). Delete struct tegra_aead_ctx->authsize field since it appears to be completely unused.

Defensive priority

Verify and apply patches for Linux kernel versions 6.10 and earlier; review system configurations for potential exposure.

Recommended defensive actions

• Verify Linux kernel versions and apply patches as necessary
• Review system configurations for potential exposure
• Monitor system logs for suspicious activity
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Evidence notes

The CVE record and source item provide details on the vulnerability and its resolution in the Linux kernel. Affected versions require verification. The vulnerability is in the crypto: tegra component of the Linux kernel, specifically in the tegra_gcm_do_one_req() function. The improper calculation of rctx->cryptlen could lead to a crash or a write beyond the rctx->dst_sg buffer during a decrypt operation if tegra_gcm_setauthsize() is not called. The fix involves modifying the tegra_gcm_do_one_req() function.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.