CVE-2026-99026
Description
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.
How to fix
- Linux Linux961563117626f4681623077ec0cfd86f86da0d49, f34b1bcac4581a5bd3daf9eff90f175e736b54aa, 489114c9ecae44e523361a4b3e610ee5ebd9189c or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 5fc889911a99043a97da1daa0d010ad72cbc3042 ≤ v < 961563117626f4681623077ec0cfd86f86da0d49, 5fc889911a99043a97da1daa0d010ad72cbc3042 ≤ v < f34b1bcac4581a5bd3daf9eff90f175e736b54aa, 5fc889911a99043a97da1daa0d010ad72cbc3042 ≤ v < 489114c9ecae44e523361a4b3e610ee5ebd9189c, 3.6 | 961563117626f4681623077ec0cfd86f86da0d49, f34b1bcac4581a5bd3daf9eff90f175e736b54aa, 489114c9ecae44e523361a4b3e610ee5ebd9189c |
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