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CVE-2026-99027

net: team: stop reusing skb after queue override PUBLISHED

Description (CNA)

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 ...

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a before b21f20320fa2f3c683e3334d70de6bfd172e544a; affected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a before 07a48cfceb3d0555710a9acb87c949500a7b4523; affected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a before 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e; affected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a before bed63353341d2d44cbad034001dd382cfe3a3892; affected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a before b7454f1940c5e6d92e753853c476a769e452f30a
Linux / Linuxaffected 3.7; unaffected 0 before 3.7; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 7.2.11 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References