Threats Tagged 'ghsa-8gg6-pfjx-8vr5'
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Threats Tagged 'ghsa-8gg6-pfjx-8vr5'
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A high-severity vulnerability in the Linux kernel TCP stack involves improper handling of devmem TCP transmit without zero-copy enforcement. This flaw allows tcp_sendmsg_locked() to attempt copying data from an iovec referencing dma-buf offsets, which normally fails and can break internal invariants. The vulnerability arises because the kernel does not strictly enforce zero-copy requirements when NETIF_F_SG is absent, leading to potential mixing of readable and unreadable fragments in a single socket buffer. A stricter validation patch has been applied to reject devmem transmission without zero-copy, addressing this issue. Join the discussion | GCVE Database | 09/17/2026, 18:31:48 UTC Added: 09/19/2026, 01:28:10 UTC |
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