CVE-2026-64055
Gravedad CVSS v3.1:
CRÍTICA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
19/07/2026
Última modificación:
30/07/2026
Descripción
*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
net: ethernet: cortina: Carry over frag counter<br />
<br />
The gmac_rx() NAPI poll function assembles packets in an<br />
SKB from a ring buffer.<br />
<br />
If the ring buffer gets completely emptied during a poll cycle,<br />
we exit gmac_rx(), but the packet is not yet completely<br />
assembled in the SKB, yet the fragment counter frag_nr is<br />
reset to zero on the next invocation.<br />
<br />
Solve this by making the RX fragment counter a part of the<br />
port struct, and carry it over between invocations.<br />
<br />
Reset the fragment counter only right after calling<br />
napi_gro_frags(), on error (after calling napi_free_frags())<br />
or if stopping the port.<br />
<br />
Reset it in some place where not strictly necessary just to<br />
emphasize what is going on.<br />
<br />
This was found by Sashiko during normal patch review.
Impacto
Puntuación base 3.x
9.80
Gravedad 3.x
CRÍTICA
Referencias a soluciones, herramientas e información
- https://git.kernel.org/stable/c/46806096f35b8d3dfa2f321ddd77f597edcdb85f
- https://git.kernel.org/stable/c/7123cf481e21b54eb6adc4cb0d8dc2876aeaee41
- https://git.kernel.org/stable/c/75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0
- https://git.kernel.org/stable/c/78cf08b3be47c28f07008a76c932bad7cdffa9d8
- https://git.kernel.org/stable/c/7af1fabdee744b7995fe01b30b77dfc397657cb5
- https://git.kernel.org/stable/c/c373b34877afea61c89e0dd2e38948c624249b9b
- https://git.kernel.org/stable/c/df31e3b64455293df1ea89c7da7d5c9bfbcdd253
- https://git.kernel.org/stable/c/ebd8ec2b309e3a447851b456ccaf8fb39f3661e7



