Not yet scoredPublished Oct 23, 2026

CVE-2026-99027net: team: stop reusing skb after queue override

Updated under an hour ago (Oct 27, 2026, 9:30 PM ET)

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Exploited in the last 30 days

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 ...

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 8ff5105a2b9dd0ba596719b165c1827d101e5f1a before b21f20320fa2f3c683e3334d70de6bfd172e544a; 8ff5105a2b9dd0ba596719b165c1827d101e5f1a builds before 07a48cfceb3d0555710a9acb87c949500a7b4523; 8ff5105a2b9dd0ba596719b165c1827d101e5f1a builds before 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e; from 8ff5105a2b9dd0ba596719b165c1827d101e5f1a before bed63353341d2d44cbad034001dd382cfe3a3892; from 8ff5105a2b9dd0ba596719b165c1827d101e5f1a before b7454f1940c5e6d92e753853c476a769e452f30a	CNA record

References

References

https://git.kernel.org/stable/c/b21f20320fa2f3c683e3334d70de6bfd172e544a
https://git.kernel.org/stable/c/07a48cfceb3d0555710a9acb87c949500a7b4523
https://git.kernel.org/stable/c/0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e
https://git.kernel.org/stable/c/bed63353341d2d44cbad034001dd382cfe3a3892
https://git.kernel.org/stable/c/b7454f1940c5e6d92e753853c476a769e452f30a

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.