Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: team: stop reusing skb after queue override A nonzero dev_queue_xmit() result does not return ownership of the skb. When an override port's qdisc drops it, the queue override helper used to try another port or the mode transmit op with the freed skb. Return the handoff decision separately from transmit success. Select only the first override port under RCU and stop after handing it the skb, regardless of the lower transmit result. Keep the existing success and drop accounting. BUG: KASAN: slab-use-after-free in sk_skb_reason_drop Write of size 4 by task poc/5040 sk_skb_reason_drop (net/core/skbuff.c:1240) dev_kfree_skb_any_reason (net/core/dev.c:3470) ab_transmit (drivers/net/team/team_mode_activebackup.c:49) team_xmit (drivers/net/team/team_core.c:1849) __dev_direct_xmit (net/core/dev.c:4934) Freed by task 5040: __tcf_kfree_skb_list (net/sched/sch_generic.c:43) __dev_queue_xmit (net/core/dev.c:4831) team_xmit (drivers/net/team/team_core.c:1846) Kernel panic - not syncing: KASAN: panic_on_warn set ...
References
- https://git.kernel.org/stable/c/07a48cfceb3d0555710a9acb87c949500a7b4523
- https://git.kernel.org/stable/c/0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e
- https://git.kernel.org/stable/c/13be794844e368b4f8e8d33e97efa23c0a1ebaf8
- https://git.kernel.org/stable/c/b21f20320fa2f3c683e3334d70de6bfd172e544a
- https://git.kernel.org/stable/c/b7454f1940c5e6d92e753853c476a769e452f30a
- https://git.kernel.org/stable/c/bed63353341d2d44cbad034001dd382cfe3a3892
- https://git.kernel.org/stable/c/e40846f661075c4c653988363f38e6868bd0a240
- https://git.kernel.org/stable/c/eaf49fba9cd054e84906d2416e8662194f763c9e
FAQ
What is CVE-2026-99027?
CVE-2026-99027 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: net: team: stop reusing skb after queue override A nonzero dev_queue_xmit() result does not return ownership of the skb. When an o...
How severe is CVE-2026-99027?
CVSS scoring is not yet available for CVE-2026-99027. Check NVD for updates.
Is there a patch for CVE-2026-99027?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.