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CVE-2026-72073: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: mmc: vub300: fix use-after-free on probe failure The vub300 driver lifetime-manages its controller state using vub300->kref, with vub300_delete() freeing the mmc host when the last reference is dropped. The probe error path after the inactivity timer has been armed still bypasses that lifetime rule, however, and falls through to mmc_free_host() directly if mmc_add_host() fails. The race window is between arming the inactivity timer and reaching the probe error unwind after mmc_add_host() fails: probe thread timer/workqueue ------------ --------------- kref_init(&vub300->kref) ref = 1 kref_get(&vub300->kref) ref = 2, timer ref add_timer(inactivity_timer) fires after one second | | race window |<----------------------------------------------------> | mmc_add_host(mmc) inactivity timer fires vub300_queue_dead_work() kref_get() ref = 3 queue_work(deadwork) mmc_add_host() fails timer_delete_sync() mmc_free_host(mmc) frees vub300 deadwork runs use-after-free The inactivity timeout is one second, so this would require mmc_add_host() to both fail and take more than one second to do so. This is unlikely to happen in practice, but the error path is still wrong. timer_delete_sync() only waits for the timer callback itself. It does not flush deadwork that the callback may already have queued. As a result, queued deadwork can still hold a kref while the probe error path directly frees the backing mmc host, including the vub300 storage. Fix this by using the same lifetime mec

    Засегнати продукти

    • Linux Linux: 0613ad2401f88bdeae5594c30afe318e93b14676 преди face65f80c6946c631ca3490b4ebd2c016a4fd2c; 0613ad2401f88bdeae5594c30afe318e93b14676 преди 6c66653dac9b25272d5fd4ed42a34aa5249e16df; 0613ad2401f88bdeae5594c30afe318e93b14676 преди 5b82af744e06cd741938c3da54fdbe564a7e52d9; 0613ad2401f88bdeae5594c30afe318e93b14676 преди 618cf6b139503ec18ef93ffd663396aaf99b763a; 0613ad2401f88bdeae5594c30afe318e93b14676 преди a3b5f242997a3be7404112fd48784881560aea57; 41ed46bdbd2878cd6567abe0974a445f8b1b8ec8; 25f05d762ca5e1c685002a53dd44f68e78ca3feb; a46e681151bbdacdf6b89ee8c4e5bad0555142bb; 3b29f8769d32016b2d89183db4d80c7a71b7e35e; 3049a3b927a40d89d4582ff1033cd7953be773c7; afc898019e7bf18c5eb7a0ac19852fcb1b341b3c; c9e85979b59cb86f0a15defa8199d740e2b36b90; 2044b2ea77945f372ef161d1bbf814e471767ff2; 4.9.337 преди 4.10; 4.14.303 преди 4.15; 4.19.270 преди 4.20; 5.4.229 преди 5.5; 5.10.163 преди 5.11; 5.15.86 преди 5.16; 6.0.16 преди 6.1; 6.1.2 преди 6.2
    • Linux Linux: 6.2; преди 6.2; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.42 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

    История

    • 15 август 2026 Публикувано

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    CVE-2026-72073: Linux | freedomonline.bg