CVE-2026-23255
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
W jądrze systemu Linux zidentyfikowano podatność związaną z brakiem odpowiedniej ochrony RCU w funkcjach ptype_seq_next() i ptype_seq_show(). Problem polega na tym, że ptype_seq_show() odczytuje nazwę urządzenia bez odpowiednich barier, co może prowadzić do naruszenia zasad RCU.
Risk Assessment
Naruszenie zasad RCU może prowadzić do nieprzewidywalnych zachowań systemu, w tym do potencjalnych awarii lub utraty danych. Organizacje powinny być świadome ryzyka związanego z równoczesnym dostępem do struktur danych.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, która zawiera poprawki dotyczące ochrony RCU w funkcjach ptype_seq_next() i ptype_seq_show(). Należy również monitorować systemy pod kątem potencjalnych problemów związanych z równoczesnym dostępem do danych.
Related vulnerabilities
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- CVE-2026-124059Critical
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- CVE-2026-124058Critical
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The Naimur Email OTP Verification for WooCommerce plugin is vulnerable to authentication bypass in versions up to and including 2.1.0. The password-reset finalization endpoint authorizes the reset solely by the presence of a database row marking an email as 'VERIFIED', with no timestamp check, session binding, or per-reset token, and the scheduled cleanup cron has no handler so it never runs.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: net: add proper RCU protection to /proc/net/ptype Yin Fengwei reported an RCU stall in ptype_seq_show() and provided a patch. Real issue is that ptype_seq_next() and ptype_seq_show() violate RCU rules. ptype_seq_show() runs under rcu_read_lock(), and reads pt->dev to get device name without any barrier. At the same time, concurrent writers can remove a packet_type structure (which is correctly freed after an RCU grace period) and clear pt->dev without an RCU grace period. Define ptype_iter_state to carry a dev pointer along seq_net_private: struct ptype_iter_state { struct seq_net_private p; struct net_device *dev; // added in this patch }; We need to record the device pointer in ptype_get_idx() and ptype_seq_next() so that ptype_seq_show() is safe against concurrent pt->dev changes. We also need to add full RCU protection in ptype_seq_next(). (Missing READ_ONCE() when reading list.next values) Many thanks to Dong Chenchen for providing a repro.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

