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CVE.org (no NVD analysis yet)· CNA Linux

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

—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Fixed version: Linux Linux 07a48cfceb3d0555710a9acb87c949500a7b4523, 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e, 13be794844e368b4f8e8d33e97efa23c0a1ebaf8; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 07a48cfceb3d0555710a9acb87c949500a7b4523, 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e, 13be794844e368b4f8e8d33e97efa23c0a1ebaf8; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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 ...

Published
Oct 23, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.7affected
    • 8ff5105a2b9dd0ba596719b165c1827d101e5f1a and later · before 13be794844e368b4f8e8d33e97efa23c0a1ebaf8affected · git
    • 8ff5105a2b9dd0ba596719b165c1827d101e5f1a and later · before e40846f661075c4c653988363f38e6868bd0a240affected · git
    • 8ff5105a2b9dd0ba596719b165c1827d101e5f1a and later · before eaf49fba9cd054e84906d2416e8662194f763c9eaffected · git
    • 8ff5105a2b9dd0ba596719b165c1827d101e5f1a and later · before b21f20320fa2f3c683e3334d70de6bfd172e544aaffected · git
    • 8ff5105a2b9dd0ba596719b165c1827d101e5f1a and later · before 07a48cfceb3d0555710a9acb87c949500a7b4523affected · git
    • 8ff5105a2b9dd0ba596719b165c1827d101e5f1a and later · before 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4eaffected · git
    • 8ff5105a2b9dd0ba596719b165c1827d101e5f1a and later · before bed63353341d2d44cbad034001dd382cfe3a3892affected · git
    • 8ff5105a2b9dd0ba596719b165c1827d101e5f1a and later · before b7454f1940c5e6d92e753853c476a769e452f30aaffected · git
    • before 3.7not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.115-26.12.115-2
Debian:14linuxbefore 7.2.11-17.2.11-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-99025Oct 23, 2026 · openvswitch: fix soft lockup in the netlink flow dump
    0Monitor
  • ← EarlierCVE-2026-99026Oct 23, 2026 · net: team: free skb when broadcast has no txable port
    0Monitor
  • Later →CVE-2026-99028Oct 23, 2026 · net: xilinx: axienet: Free outstanding DMA buffers on dmaengine stop
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux07a48cfceb3d0555710a9acb87c949500a7b4523Vendor (CNA)
Linux Linux0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4eVendor (CNA)
Linux Linux13be794844e368b4f8e8d33e97efa23c0a1ebaf8Vendor (CNA)
Linux Linuxb21f20320fa2f3c683e3334d70de6bfd172e544aVendor (CNA)
Linux Linuxb7454f1940c5e6d92e753853c476a769e452f30aVendor (CNA)
Linux Linuxbed63353341d2d44cbad034001dd382cfe3a3892Vendor (CNA)
Linux Linuxe40846f661075c4c653988363f38e6868bd0a240Vendor (CNA)
Linux Linuxeaf49fba9cd054e84906d2416e8662194f763c9eVendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.115-2 · Debian:13Package registry (OSV)
debian:linux7.2.11-1 · Debian:14Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 13, 2026+21 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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