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CVE-2026-53331: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: slimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl->lock During the SSR/PDR down notification the tx_lock is taken with the intent to provide synchronization with active DMA transfers. But during this period qcom_slim_ngd_down() is invoked, which ends up in slim_report_absent(), which takes the slim_controller lock. In multiple other codepaths these two locks are taken in the opposite order (i.e. slim_controller then tx_lock). The result is a lockdep splat, and a possible deadlock: rprocctl/449 is trying to acquire lock: ffff00009793e620 (&ctrl->lock){+.+.}-{4:4}, at: slim_report_absent (drivers/slimbus/core.c:322) slimbus but task is already holding lock: ffff00009793fb50 (&ctrl->tx_lock){+.+.}-{4:4}, at: qcom_slim_ngd_ssr_pdr_notify (drivers/slimbus/qcom-ngd-ctrl.c:1475) slim_qcom_ngd_ctrl which lock already depends on the new lock. Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ctrl->tx_lock); lock(&ctrl->lock); lock(&ctrl->tx_lock); lock(&ctrl->lock); The assumption is that the comment refers to the desire to not call qcom_slim_ngd_exit_dma() while we have an ongoing DMA TX transaction. But any such transaction is initiated and completed within a single qcom_slim_ngd_xfer_msg(). Prior to calling qcom_slim_ngd_exit_dma() the slim_controller is torn down, all child devices are notified that the slimbus is gone and the child devices are removed. Stop taking the tx_lock in qcom_slim_ngd_ssr_pdr_notify() to avoid the deadlock.

    Засегнати продукти

    • Linux Linux: a899d324863a3d15ce0eea513884e1b73a758c58 преди 3d1561537237c6cc1db76155183d8bbdac2339f0; a899d324863a3d15ce0eea513884e1b73a758c58 преди dc4d5c57e012c2c669793deb1515a57bbc6bf5dd; a899d324863a3d15ce0eea513884e1b73a758c58 преди d54a221b0f3cd9e1f03f18104be34e02a8258fae; a899d324863a3d15ce0eea513884e1b73a758c58 преди aad4337a21b9ad3ae8d668fa8678d05e26ecbaa8; a899d324863a3d15ce0eea513884e1b73a758c58 преди 9f0d45d509b434c54da10e01f4ef8086e4583401; a899d324863a3d15ce0eea513884e1b73a758c58 преди 9708eb50fd7343145b422be852f890212155d845; a899d324863a3d15ce0eea513884e1b73a758c58 преди 55f2ea9ff83cc27a85526b14bc9b32f96a08d6ec
    • Linux Linux: 5.11; преди 5.11; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.143 до 6.6.*; 6.12.94 до 6.12.*; 6.18.36 до 6.18.*; 7.0.13 до 7.0.*; от 7.1 нататък

    История

    • 1 юли 2026 Публикувано

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    CVE-2026-53331: Linux | freedomonline.bg