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CVE-2026-97604: 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: fbdev: vfb: defer cleanup until the last reference FBIOGETCMAP takes a shallow snapshot of info->cmap and performs the usercopy after dropping info->lock. vfb_remove() frees the colormap immediately after unregistering the framebuffer, even when an open file still holds a reference to fb_info. A concurrent driver unbind can therefore free the colormap while the ioctl copies it to userspace. KASAN reports: BUG: KASAN: slab-use-after-free in _copy_to_user Read of size 512 by task poc/125 _copy_to_user (./include/linux/instrumented.h:129 ./include/linux/uaccess.h:201 lib/usercopy.c:24) fb_cmap_to_user (./include/linux/uaccess.h:230 drivers/video/fbdev/core/fbcmap.c:211) do_fb_ioctl (drivers/video/fbdev/core/fb_chrdev.c:114) Allocated by task 1: fb_alloc_cmap_gfp (./include/linux/slab.h:973 ./include/linux/slab.h:1290 drivers/video/fbdev/core/fbcmap.c:108) vfb_probe (drivers/video/fbdev/vfb.c:459) Freed by task 124: fb_dealloc_cmap (drivers/video/fbdev/core/fbcmap.c:151) vfb_remove (drivers/video/fbdev/vfb.c:489) unregister_framebuffer() drops the registration reference, and fbdev calls fb_destroy after the last put_fb_info(). Move the registered framebuffer's cleanup into an fb_destroy callback so its colormap and screen buffer stay alive until all file references have been released.

    Засегнати продукти

    • Linux Linux: 5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a преди bf49eac7ed11aabd0b9b790c062742a8e4be97c6; 5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a преди 040ce3950f64a11e9ee5646c8aaa91fd2e29e245; 5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a преди ab664e279eb2a68e55895dd115a9488807280f07; 5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a преди de5a0eda59fe4b3eacd1a67c992e54766bb6683f; 5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a преди 86356f13598f59f5acb1754895747dcdaf65a254; 5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a преди 5ff1effb047e465cde193d7df95988aa1520035e; 5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a преди 3c91e51a53cf805e551e5dc8149cd0539a6dbb9d; 5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a преди a0a34a40ed299c9c7cff6af163a5b883ee9d6d73
    • Linux Linux: 2.6.30; преди 2.6.30; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.111 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-97604: Linux | freedomonline.bg