CVE-2026-99026

In the Linux kernel, the following vulnerability has been resolved: net: team: free skb when broadcast has no txable port bc_transmit() sends the original skb through the last txable port. When no port is txable, it returns false without consuming the skb, but team_xmit() still returns NETDEV_TX_OK. AF_PACKET sends then retain the skb and its socket write-memory charge. A TX-enabled, link-down port keeps the broadcast transmit op installed. Carrier can stay up through a second link-up, TX-disabled port or be forced on by userspace. Free the original skb on the no-port path while leaving the existing drop accounting intact. Discovered by Sashiko during review of previous commit.

• https://git.kernel.org/stable/c/489114c9ecae44e523361a4b3e610ee5ebd9189c
• https://git.kernel.org/stable/c/961563117626f4681623077ec0cfd86f86da0d49
• https://git.kernel.org/stable/c/f34b1bcac4581a5bd3daf9eff90f175e736b54aa

Published

Oct 23, 2026

Last Modified

Oct 23, 2026

Status

Received

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