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CVE-2026-72047: 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: ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit ca8210_test_int_driver_write() and ca8210_test_int_user_read() exchange a kmalloc'd buffer pointer through a struct kfifo, but pass a literal '4' as the byte count to kfifo_in()/kfifo_out(). This is correct on 32-bit (pointer = 4 bytes), but on 64-bit only the low 4 bytes of the 8-byte pointer are written into the FIFO. The reader then reads back 4 bytes into an 8-byte local pointer variable, leaving the upper 4 bytes uninitialized stack data. The first dereference of the reconstructed pointer (fifo_buffer[1]) accesses an arbitrary kernel address and generally results in an oops. Use sizeof(fifo_buffer) so the byte count matches pointer width on every architecture. The driver has no architecture restriction in Kconfig, so any 64-bit build with CONFIG_IEEE802154_CA8210_DEBUGFS=y is exposed. Issue has been latent since the driver was added in 2017 because it is most commonly deployed on 32-bit MCUs. Found via a custom Coccinelle semantic patch hunting for short-byte kfifo I/O on byte-mode kfifos used to shuttle pointers.

    Засегнати продукти

    • Linux Linux: ded845a781a578dfb0b5b2c138e5a067aa3b1242 преди 2c1664ccfae653979b38788211240b5a1ee317ed; ded845a781a578dfb0b5b2c138e5a067aa3b1242 преди 093aacb0c56d5c693e3169a0224062e77c3fd0c0; ded845a781a578dfb0b5b2c138e5a067aa3b1242 преди 87dab14a4f68895d6f4d798e6ee3556cd64e8c72; ded845a781a578dfb0b5b2c138e5a067aa3b1242 преди 1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe; ded845a781a578dfb0b5b2c138e5a067aa3b1242 преди 65dc342274a01616f5c17105f7360a3b4bfd7a3d; ded845a781a578dfb0b5b2c138e5a067aa3b1242 преди 2059c28bd725beded01277cdf1f67be33e714323; ded845a781a578dfb0b5b2c138e5a067aa3b1242 преди d8ce67fa6a5e6929f5414e933ff9665176c2bce6; ded845a781a578dfb0b5b2c138e5a067aa3b1242 преди 6d7f7bcf225b2d566176bf6229dbd1252940cb3c
    • Linux Linux: 4.12; преди 4.12; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *

    История

    • 15 август 2026 Публикувано

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    Първоизточници

    CVE-2026-72047: Linux | freedomonline.bg