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CVE-2026-31532 is a use-after-free vulnerability in the Linux kernel's Controller Area Network (CAN) raw socket implementation. During socket teardown, raw_release() unregisters receive filters through can_rx_unregister(), but receiver deletion is deferred through call_rcu(). An outstanding raw_rcv() invocation can therefore continue executing in an RCU read-side critical section after raw_release() frees the per-CPU ro->uniq storage. Access to this freed storage can cause kernel instability or a crash. The fix defers freeing the storage until the raw socket destructor runs, after the relevant RCU callbacks have drained.
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A use-after-free vulnerability in the Linux kernel's raw CAN socket implementation. Deferred receive-filter cleanup allows raw_rcv() to access freed per-CPU storage. The fix moves storage deallocation into the socket destructor, ensuring relevant RCU callbacks have completed. The reference assigns a CVSS v3 base score of 7.8, with local access and low privileges required and potentially high confidentiality, integrity, and availability impacts.
A use-after-free vulnerability in the Linux kernel's raw CAN socket handling. Deferred RCU callbacks can leave raw_rcv() accessing freed per-CPU storage after socket release. The fix delays freeing that storage until the relevant callbacks have drained. The advisory assigns CVSS v3 severity High, with a score of 7.8 and a vector indicating local access, low privileges, no user interaction, and high confidentiality, integrity, and availability impacts.
A use-after-free vulnerability in the Linux kernel CAN raw socket receive path, involving ro->uniq in raw_rcv().
A race-condition use-after-free vulnerability in the Linux kernel net/can subsystem.
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Cross-references every affected SKU, including bundled OEM variants.
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