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CVE-2026-63805

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: crypto: nx - fix nx_crypto_ctx_exit argument nx_crypto_ctx_shash_exit calls nx_crypto_ctx_exit with crypto_shash_ctx(...) but c…

Published Jul 19, 2026EPSS 0.13%

Overview

CVE-2026-63805 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

crypto: nx - fix nx_crypto_ctx_exit argument

nx_crypto_ctx_shash_exit calls nx_crypto_ctx_exit with crypto_shash_ctx(...)

but crypto_shash_ctx gives a nx_crypto_ctx *, not a crypto_tfm *.

Fix the type in nx_crypto_ctx_exit and drop the bogus crypto_tfm_ctx

call.

This fixes the following oops:

BUG: Unable to handle kernel data access at 0xc0403effffffffc8

Faulting instruction address: 0xc000000000396cb4

Oops: Kernel access of bad area, sig: 11 [#15]

Call Trace:

nx_crypto_ctx_shash_exit+0x24/0x60

crypto_shash_exit_tfm+0x28/0x40

crypto_destroy_tfm+0x98/0x140

crypto_exit_ahash_using_shash+0x20/0x40

crypto_destroy_tfm+0x98/0x140

hash_release+0x1c/0x30

alg_sock_destruct+0x38/0x60

__sk_destruct+0x48/0x2b0

af_alg_release+0x58/0xb0

__sock_release+0x68/0x150

sock_close+0x20/0x40

__fput+0x110/0x3a0

sys_close+0x48/0xa0

system_call_exception+0x140/0x2d0

system_call_common+0x

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/4e67f504ee9ded15e256b64f4fde150e917381d7Refgit.kernel.org/stable/c/833033e6e55acf11304ff7bbbdf18351d139c281Refgit.kernel.org/stable/c/8d8507a457667f23477a15496b91908a5b5b7cf3

How CyberStrike helps

Frequently asked questions

What is CVE-2026-63805?

CVE-2026-63805 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-63805?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-63805?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-63805?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-63805 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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