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CVE-2026-46267
Description
A flaw was found in the Linux kernel's Near Field Communication (NFC) Host Controller Interface (HCI) Synchronous High-level Data Link Control (SHDLC) subsystem. This vulnerability arises because timers and work items can remain active and access freed SHDLC state and data queues during the deinitialization process (llc_shdlc_deinit()). This can lead to a Use-After-Free (UAF) condition and other shutdown race issues, potentially causing system instability or crashes.
- Bugzilla 2484467: kernel: nfc: hci: shdlc: Stop timers and work before freeing context
- CWE-364: Signal Handler Race Condition
Frequently Asked Questions
For more information, see https://access.redhat.com/solutions/762393.
- "Under investigation" doesn't necessarily mean that the product is affected by this vulnerability. It only means that our Analysis Team is still working on determining whether the product is affected and how it is affected.
- The term 'Affected' means that our Analysis team has determined that this product, such as Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to address this issue in the near future. This includes all minor releases of this product unless noted otherwise in the Statement text.
Available options depend mostly on the Impact of the vulnerability and the current Life Cycle phase of your product. Overall, you have the following options:
- Upgrade to a supported product version that includes a fix for this vulnerability (recommended).
- Apply a mitigation (if one exists).
- Customers with the Technical Account Manager (TAM) RHEL Security Select Add-on can review this CVE directly with their TAM.
Available options depend mostly on the Impact of the vulnerability and the current Life Cycle phase of your product. Overall, you have the following options:
- Apply a mitigation (if one exists).
- Red Hat Engineering focuses on addressing high-priority issues based on the impact and product lifecycle expectations. Therefore, lower-priority issues will not receive immediate fixes.
- Customers with the technical account manager (TAM) RHEL Security Select Add-on can review this CVE directly with their TAM.
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