Threats Tagged 'cve-2026-63895'
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Threats Tagged 'cve-2026-63895'
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In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: copy only received bytes on short ep0 read ffs_ep0_read()… (CVE-2026-63895)CVE-2026-63895 0 A vulnerability in the Linux kernel's USB gadget function (f_fs) was identified where the function ffs_ep0_read() copies more bytes to userspace than were actually received on a short control OUT transfer. This results in uninitialized kernel memory (slab residue) being leaked to the privileged FunctionFS daemon. The issue arises because the code allocates a buffer based on the expected length but copies the full length regardless of the actual received byte count. The vulnerability is not reachable by unprivileged userspace and requires bypassing normal host-side USB checks. The fix involves copying only the actual received bytes to userspace. Join the discussion | GCVE Database | 07/19/2026, 18:31:44 UTC Added: 07/19/2026, 19:38:19 UTC |
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