net: stmmac: fix integer underflow in chain mode

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SUSE CVE-2026-31649

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix integer underflow in chain mode The jumbofrm chain-mode implementation unconditionally computes len = nopagedlen - bmax; where nopagedlen = skbheadlenskb linear bytes only and bmax is BUFSIZE8KiB or BUFSIZE2KiB...

CVE-2026-31649

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix integer underflow in chain mode The jumbofrm chain-mode implementation unconditionally computes len = nopagedlen - bmax; where nopagedlen = skbheadlenskb linear bytes only and bmax is BUFSIZE8KiB or BUFSIZE2KiB...

CVE-2026-31649 net: stmmac: fix integer underflow in chain mode

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix integer underflow in chain mode The jumbofrm chain-mode implementation unconditionally computes len = nopagedlen - bmax; where nopagedlen = skbheadlenskb linear bytes only and bmax is BUFSIZE8KiB or BUFSIZE2KiB...

CVE-2026-31649

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix integer underflow in chain mode The jumbofrm chain-mode implementation unconditionally computes len = nopagedlen - bmax; where nopagedlen = skbheadlenskb linear bytes only and bmax is BUFSIZE8KiB or BUFSIZE2KiB...

EUVD-2026-25542

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix integer underflow in chain mode The jumbofrm chain-mode implementation unconditionally computes len = nopagedlen - bmax; where nopagedlen = skbheadlenskb linear bytes only and bmax is BUFSIZE8KiB or BUFSIZE2KiB...

CVE-2026-31649

The CVE-2026-31649 issue affects the Linux kernel’s stmmac driver, where jumbo_frm() can underflow when processing fragmented packets. If nopaged_len is small but skb->len is large, len = nopaged_len - buf_len (with buf_len clamped to min(nopaged_len, bmax)) can still yield a large unsigned va...

CVE-2026-31649

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix integer underflow in chain mode The jumbofrm chain-mode implementation unconditionally computes len = nopagedlen - bmax; where nopagedlen = skbheadlenskb linear bytes only and bmax is BUFSIZE8KiB or BUFSIZE2KiB...

PT-2026-35001

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An integer underflow exists in the jumbo frm chain-mode implementation within the stmmac network driver. The issue occurs when a packet has a small linear portion but a large total lengt...