High [CVE-2026-80522] tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req
This high-severity Red Hat Linux advisory covers CVE-2026-80522 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat package: kernel-rt.
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Summary
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.
A flaw was found in the Linux kernel's Tegra cryptography module. An incorrect calculation in the 'tegra_gcm_do_one_req()' function, specifically when handling the 'cryptlen' parameter, can occur if a caller does not properly initialize the authentication size.
This can lead to a write beyond the intended memory buffer during a decrypt operation, potentially causing a system crash (Denial of Service). Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9.
Red Hat fixing advisory: RHSA-2026:72624, RHSA-2026:72623.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
- kernel-0:6.12.0-211.61.1.el10_2
- kernel-0:5.14.0-687.53.1.el9_8
- RHSA-2026:72624
- RHSA-2026:72623
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
Mitigation checklist
- To prevent the `tegra_se_aes` crypto module from being loaded, blacklist it by creating a configuration file. Create `/etc/modprobe.d/blacklist-tegra.conf` with the content: ``` blacklist tegra_se_aes ``` Then, regenerate the initramfs and reboot the system for the changes to take effect: ```bash dracut -f -v $(uname -r) reboot ``` This action may affect system functionality if NVIDIA Tegra hardware and its cryptographic features are actively utilized.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
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