VulnerabilityPublished 23 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-99027· High

Not known to be exploited · fixed in bed63353341d2d44cbad034001dd382cfe3a3892 : patch Linux kernel soon.

Data as of 26 Oct 2026, 14:05 UTC

Severity

High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in bed63353341d2d44cbad034001dd382cfe3a3892, b7454f1940c5e6d92e753853c476a769e452f30a, b21f20320fa2f3c683e3334d70de6bfd172e544a +2

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-p95p-h38v-xc33

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 8ff5105a2b9dd0ba596719b165c1827d101e5f1a, < bed63353341d2d44cbad034001dd382cfe3a3892	Fixed in bed63353341d2d44cbad034001dd382cfe3a3892
LinuxLinux	Affected ≥ 8ff5105a2b9dd0ba596719b165c1827d101e5f1a, < b7454f1940c5e6d92e753853c476a769e452f30a	Fixed in b7454f1940c5e6d92e753853c476a769e452f30a
LinuxLinux	Affected ≥ 8ff5105a2b9dd0ba596719b165c1827d101e5f1a, < b21f20320fa2f3c683e3334d70de6bfd172e544a	Fixed in b21f20320fa2f3c683e3334d70de6bfd172e544a
LinuxLinux	Affected ≥ 8ff5105a2b9dd0ba596719b165c1827d101e5f1a, < 07a48cfceb3d0555710a9acb87c949500a7b4523	Fixed in 07a48cfceb3d0555710a9acb87c949500a7b4523
LinuxLinux	Affected ≥ 8ff5105a2b9dd0ba596719b165c1827d101e5f1a, < 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e	Fixed in 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e
LinuxLinux	Affected =3.7	Fixed in–

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

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