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.

Package Linux Kernel
Published 2026-10-23
Last modified 2026-10-23
Patch available
Yes

Affected versions

Linux kernel versions 3.6 and later are affected. Fixed in 6.18.57, 7.2.11, 7.3 and their respective stable series.

Affected from
≥ 3.6
Fixed in
✓ 6.18.57 6.18.x ✓ 7.2.11 7.2.x ✓ 7.3

References

3 total

Frequently asked questions

  • What is CVE-2026-99026?

    CVE-2026-99026 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.6 onward and has been patched in 6.18.57, 7.2.11 and 7.3. CVE-2026-99026 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2026-99026?

    Yes. CVE-2026-99026 has been patched. Fixed versions include 6.18.57, 7.2.11 and 7.3. If you are running Linux kernel 3.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-99026 actively exploited?

    No. CVE-2026-99026 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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