PT-2026-61372 · Linux · Linux

CVE-2026-64055 · Publicado 2026-07-19 · Atualizado 2026-07-19

NVD

CVSS v3.1

9.8

Crítica

Vetor base

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: cortina: Carry over frag counter

The gmac rx() NAPI poll function assembles packets in an SKB from a ring buffer.

If the ring buffer gets completely emptied during a poll cycle, we exit gmac rx(), but the packet is not yet completely assembled in the SKB, yet the fragment counter frag nr is reset to zero on the next invocation.

Solve this by making the RX fragment counter a part of the port struct, and carry it over between invocations.

Reset the fragment counter only right after calling napi gro frags(), on error (after calling napi free frags()) or if stopping the port.

Reset it in some place where not strictly necessary just to emphasize what is going on.

This was found by Sashiko during normal patch review.

Correção

Identificadores relacionados

CVE-2026-64055

Produtos afetados

Linux

Referências · 9

• https://git.kernel.org/stable/c/78cf08b3be47c28f07008a76c932bad7cdffa9d8 · Nota
• https://git.kernel.org/stable/c/7123cf481e21b54eb6adc4cb0d8dc2876aeaee41 · Nota
• https://git.kernel.org/stable/c/46806096f35b8d3dfa2f321ddd77f597edcdb85f · Nota
• https://git.kernel.org/stable/c/c373b34877afea61c89e0dd2e38948c624249b9b · Nota
• https://git.kernel.org/stable/c/df31e3b64455293df1ea89c7da7d5c9bfbcdd253 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-64055 · Nota de Segurança
• https://git.kernel.org/stable/c/75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0 · Nota
• https://git.kernel.org/stable/c/ebd8ec2b309e3a447851b456ccaf8fb39f3661e7 · Nota
• https://git.kernel.org/stable/c/7af1fabdee744b7995fe01b30b77dfc397657cb5 · Nota