CVE-2026-90151 Affecting kernel-tools-devel package, versions <1:6.1.188-233.385.amzn2023
Threat Intelligence
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Test your applications- Snyk IDSNYK-AMZN2023-KERNELTOOLSDEVEL-20872993
- published13 Oct 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
NewCVE-2026-90151 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2023 kernel-tools-devel to version 1:6.1.188-233.385.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3197.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools-devel package and not the kernel-tools-devel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
NFSv4: remove callback IDR entry on client allocation failure
nfs4_alloc_client() allocates an NFSv4.0 callback identifier before it finishes setting up the client. If any later initialization step fails, the error path frees the nfs_client directly with nfs_free_client(). That bypasses nfs_put_client(), which is where the callback IDR entry is removed during normal teardown.
A failed allocation can therefore leave cb_ident_idr pointing at a freed nfs_client. A later NFSv4.0 callback lookup by cb_ident would find the stale pointer and take a reference to it.
Make the callback IDR removal helper callable by the allocation failure path, and remove the callback identifier before freeing the client.
This was found by a local static-analysis checker for publish-before-free lifetime bugs and confirmed by manual inspection.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-90151
- https://git.kernel.org/stable/c/3f2387e8bfbc4efda5d77c3a11a028d0a119c48f
- https://git.kernel.org/stable/c/5891c03e150920618db0e9c4ea2d772abacdcfd1
- https://git.kernel.org/stable/c/68c721391b761dbe38d5b0094d2bb6e8489ad92b
- https://git.kernel.org/stable/c/7c4812eb96bdcafb31a65b12f2aa96659429d1d4
- https://git.kernel.org/stable/c/80b1c3d5a881f7d9081aa9f46da9742878a0f893
- https://git.kernel.org/stable/c/9bfdd0f591307b5198826a0e7a5b2f35f87acd2d
- https://git.kernel.org/stable/c/d05c2007b3d84ccba11dc6e9cb3202768cc72f14
- https://git.kernel.org/stable/c/fc95ca82d5ae598c428ab5a00ae69f8526d59371