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CVE-2026-89835: Linux

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CVSS

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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: f2fs: avoid NULL checkpoint thread access in sysfs checkpoint_merge can be enabled even when no checkpoint merge thread is running. A read-only mount is one case: f2fs does not start f2fs_issue_ckpt there, but ckpt_thread_ioprio is still writable through sysfs. The ckpt_thread_ioprio store path updates the saved ioprio value and, when checkpoint_merge is enabled, calls set_task_ioprio() for the checkpoint thread. If cprc->f2fs_issue_ckpt is NULL, that dereferences a NULL task pointer. Protect ckpt_thread_ioprio sysfs writes with s_umount as well, so the checkpoint thread cannot disappear under the store path while updating its ioprio.

    Засегнати продукти

    • Linux Linux: e65920661708b7c0f3db45c9cd5d0095034ee37f преди 54196bcfde998fb37009f50e0ef16498f651f0f9; e65920661708b7c0f3db45c9cd5d0095034ee37f преди 22760e3e9cecbddc475edc91600787abf407a302; e65920661708b7c0f3db45c9cd5d0095034ee37f преди a6573f3ffc19542de9ebc1a2b1f930fd48ba538c; e65920661708b7c0f3db45c9cd5d0095034ee37f преди aefcec3bebdeed2bff444378122300763325ba23; e65920661708b7c0f3db45c9cd5d0095034ee37f преди 8f3b99c50dd0da1777994ce7c7e60d39b9f60f4b; e65920661708b7c0f3db45c9cd5d0095034ee37f преди 5cb33b00c8fbb6e8f1fa3d281c3036d5f7c7c41f
    • Linux Linux: 5.12; преди 5.12; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; 7.3 до *

    История

    • 16 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89835: Linux | freedomonline.bg