CVE-2025-68726
In the Linux kernel, the following vulnerability has been resolved: crypto: aead - Fix reqsize handling Commit afddce13ce81d ("crypto: api - Add reqsize to crypto_alg") introduced cra_reqsize field in crypto_alg struct to replace type specific reqsize fields. It looks like this was introduced specifically for ahash and acomp from the commit description as subsequent commits add necessary changes in these alg frameworks. However, this is being recommended for use in all crypto algs instead of setting reqsize using crypto_*_set_reqsize(). Using cra_reqsize in aead algorithms, hence, causes memory corruptions and crashes as the underlying functions in the algorithm framework have not been updated to set the reqsize properly from cra_reqsize. [1] Add proper set_reqsize calls in the aead init function to properly initialize reqsize for these algorithms in the framework. [1]: https://gist.github.com/Pratham-T/24247446f1faf4b7843e4014d5089f6b
Affected versions
Linux kernel versions
6.16
and later are affected. Fixed in
6.17.13,
6.18.2,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2025-68726 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
-
PatchKernel patch commithttps://git.kernel.org/stable/c/12b413f5460c393d1151a37f591140693eca0f84
-
PatchKernel patch commithttps://git.kernel.org/stable/c/64377e66e187164bd6737112d07257f5f0feb681
-
PatchKernel patch commithttps://git.kernel.org/stable/c/9b04d8f00569573796dd05397f5779135593eb24
Frequently asked questions
-
What is CVE-2025-68726?
CVE-2025-68726 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.16 onward and has been patched in 6.17.13, 6.18.2 and 6.19. CVE-2025-68726 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2025-68726?
Yes — CVE-2025-68726 has been patched. Fixed versions include 6.17.13, 6.18.2 and 6.19. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2025-68726 actively exploited?
No — CVE-2025-68726 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.