CVE-2026-90430 Affecting python3-perf6.12-debuginfo package, versions <1:6.12.111-136.204.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.
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- published13 Oct 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
CVE-2026-90430 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2023 python3-perf6.12-debuginfo to version 1:6.12.111-136.204.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3193.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python3-perf6.12-debuginfo package and not the python3-perf6.12-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:
iommu/tegra241-cmdqv: Publish an LVCMDQ only after it is fully initialized
tegra241_vintf_init_lvcmdq() stores the freshly allocated vcmdq pointer to the vintf->lvcmdqs[] array, before tegra241_vcmdq_alloc_smmu_cmdq() builds the vcmdq->cmdq. The error ISR dereferences that cmdq, so a latched LVCMDQ error (e.g. one inherited across a kexec) firing in this window would make tegra241_vintf0_handle_error() pass the still-zeroed arm_smmu_cmdq down to __arm_smmu_cmdq_skip_err(), dereferencing NULL queue register pointers.
Drop the store from tegra241_vintf_init_lvcmdq() and publish the vcmdq at the end of the allocation instead, with an smp_store_release() that pairs with an smp_load_acquire() in the ISR, which can see a fully built LVCMDQ or NULL.
The user-owned LVCMDQ allocation moves accordingly, publishing the vcmdq once tegra241_vcmdq_hw_init_user() succeeds, using a plain store since a user VINTF's lvcmdqs[] has no lockless reader -- the error ISR only walks the VINTF0 array.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-90430
- https://git.kernel.org/stable/c/792f720fc23fe5bd6508d40ed73ae739debd6dcb
- https://git.kernel.org/stable/c/b4535b403d6bf9bcc24dbd62096711329b9c612c
- https://git.kernel.org/stable/c/cbc41aacd49e695338940196e7084770365e1b68
- https://git.kernel.org/stable/c/d5ec248ee1c79354979c23f7f390e856e9535651