CVE-2026-46164 Affecting kernel6.18-debuginfo package, versions <1:6.18.33-63.124.amzn2023
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-AMZN2023-KERNEL618DEBUGINFO-17414775
- published23 Jun 2026
- disclosed28 May 2026
Introduced: 28 May 2026
CVE-2026-46164 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2023 kernel6.18-debuginfo to version 1:6.18.33-63.124.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1866.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel6.18-debuginfo package and not the kernel6.18-debuginfo 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:
btrfs: fix double free in create_space_info_sub_group() error path
When kobject_init_and_add() fails, the call chain is:
create_space_info_sub_group() -> btrfs_sysfs_add_space_info_type() -> kobject_init_and_add() -> failure -> kobject_put(&sub_group->kobj) -> space_info_release() -> kfree(sub_group)
Then control returns to create_space_info_sub_group(), where:
btrfs_sysfs_add_space_info_type() returns error -> kfree(sub_group)
Thus, sub_group is freed twice.
Keep parent->sub_group[index] = NULL for the failure path, but after btrfs_sysfs_add_space_info_type() has called kobject_put(), let the kobject release callback handle the cleanup.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-46164
- https://git.kernel.org/stable/c/14b22be1dd844383eb03af9b1ee3b6b25d32aeaf
- https://git.kernel.org/stable/c/259af6857a1b4f1e9ef8b780353f9d11c26a22bd
- https://git.kernel.org/stable/c/a7449edf96143f192606ec8647e3167e1ecbd728
- https://git.kernel.org/stable/c/d2a675f2e238ec96c8e91e2718c1f910c9c8fb21
- https://git.kernel.org/stable/c/dfd05a16b5c9d1d98b47905f37f2fccda52173d1
- https://git.kernel.org/stable/c/c2d59527cba6d59f0d77a75c1101ab4e69758bea