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CVE-2026-64251: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: pwrseq: core: fix use-after-free in pwrseq_debugfs_seq_next() pwrseq_debugfs_seq_next() declares 'next' with __free(put_device), which causes put_device() to be called on the returned pointer when the variable goes out of scope. This results in a use-after-free since the seq_file framework receives a pointer whose reference has already been dropped. Simply removing __free(put_device) would fix the UAF but would leak the reference acquired by bus_find_next_device(), as stop() only calls up_read(&pwrseq_sem) and never releases the device reference. Fix this by making the reference counting consistent across all seq_file callbacks, matching the standard pattern used by PCI and SCSI: - start(): use get_device() so it returns a referenced pointer. - next(): explicitly put_device(curr) to release the previous device's reference (no NULL check needed - the seq_file framework only calls next() while the previous return was non-NULL). - stop(): put_device(data) to release the last iterated device's reference, with a NULL guard since stop() may be called with NULL when start() returned NULL or next() reached end-of-sequence.

    Засегнати продукти

    • Linux Linux: 249ebf3f65f8530beb2cbfb91bff1d83ba88d23c преди ba0b9f04c7a5f9887b8ce672eaf049502c0548ec; 249ebf3f65f8530beb2cbfb91bff1d83ba88d23c преди e91df6d273445c03f5aa302bfe147eda33d45794; 249ebf3f65f8530beb2cbfb91bff1d83ba88d23c преди 73569a44fca2992f0ca4a4c0104069741b9873a0; 249ebf3f65f8530beb2cbfb91bff1d83ba88d23c преди 257595adf9dac15ae1edd9d07753fbc576a7583d
    • Linux Linux: 6.11; преди 6.11; 6.12.95 до 6.12.*; 6.18.38 до 6.18.*; 7.1.3 до 7.1.*; от 7.2 нататък

    История

    • 24 юли 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-64251: Linux | freedomonline.bg