Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: dualpi2: fix GSO backlog accounting When DualPI2 splits a GSO skb into N segments, it propagates N additional packets to its parent before returning NET_XMIT_SUCCESS. The parent then accounts for the original skb once more, leaving its qlen one larger than the number of packets actually queued. With QFQ as the parent, after all real packets are dequeued, QFQ still has a non-zero qlen while its in-service aggregate has no active classes. qfq_choose_next_agg() returns NULL and qfq_dequeue() passes the result to qfq_peek_skb(), causing a NULL pointer dereference. Follow the same pattern used by tbf_segment() and taprio: count only successfully queued segments, propagate the difference between the original skb and those segments, and return NET_XMIT_SUCCESS whenever at least one segment was queued.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.17, < 6.18.39 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/05ed733b65ab977dd931e7f7ac0f62fdb81205c2Patch
- https://git.kernel.org/stable/c/806586e33891066487db1f002be3d455cda6b516Patch
- https://git.kernel.org/stable/c/c4b70c1512b8f9f33f23c2c8196dfd1210207681Patch
FAQ
What is CVE-2026-64207?
CVE-2026-64207 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: net/sched: dualpi2: fix GSO backlog accounting When DualPI2 splits a GSO skb into N segments, it propagates N additional packets t...
How severe is CVE-2026-64207?
CVE-2026-64207 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64207?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.