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CVE-2026-63964: 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: usb: typec: ucsi: ccg: reject firmware images without a ':' record header do_flash() locates the first .cyacd record with p = strnchr(fw->data, fw->size, ':'); while (p < eof) { s = strnchr(p + 1, eof - p - 1, ':'); ... } If the firmware image contains no ':' byte, strnchr() returns NULL. NULL compares less than the valid kernel pointer eof, so the loop body runs and strnchr() is called with p + 1 == (void *)1 and a length of roughly (unsigned long)eof, causing a wonderful crash. The not_signed_fw fallthrough earlier in do_flash() and the chip-state branches in ccg_fw_update_needed() allow an unsigned blob to reach this loop, so a root user who can place a crafted file under /lib/firmware and write the do_flash sysfs attribute can trigger the oops. Bail out with -EINVAL when the initial strnchr() returns NULL.

    Засегнати продукти

    • Linux Linux: 5c9ae5a87573d38cfc4c740aafda2fa6ce06e401 преди b41dfc033fe594e152648050e95b9489cd53e9e3; 5c9ae5a87573d38cfc4c740aafda2fa6ce06e401 преди 2f395ca1263bd181995eb829f5943a83a20db213; 5c9ae5a87573d38cfc4c740aafda2fa6ce06e401 преди 6526f8684f72391138353642af908803ba70795e; 5c9ae5a87573d38cfc4c740aafda2fa6ce06e401 преди 3f432b8203066c26770fe6ea591361f10021dd6b; 5c9ae5a87573d38cfc4c740aafda2fa6ce06e401 преди c4ee519b06389e59ba2d6aa722fcc4a02a8bbcbb; 5c9ae5a87573d38cfc4c740aafda2fa6ce06e401 преди a38ed87818b2419090fb1a6338ddce6842b65dfa; 5c9ae5a87573d38cfc4c740aafda2fa6ce06e401 преди c8460de584fe5415d212cfdd127d4db90835a450; 5c9ae5a87573d38cfc4c740aafda2fa6ce06e401 преди d7486952bf74e546ee3748fb14b2d07881fa6273
    • Linux Linux: 5.2; преди 5.2; 5.10.259 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.143 до 6.6.*; 6.12.93 до 6.12.*; 6.18.35 до 6.18.*; 7.0.12 до 7.0.*; от 7.1 нататък

    История

    • 19 юли 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-63964: Linux | freedomonline.bg