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

CVE-2026-98345: wifi: cfg80211: check IP header size in cfg80211_classify8021d()

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 12c0abd4d1c1b04a7663d04ba85268bc9ad9c017, 18d5547327c202cda33ad2bbd203220c2c62c8a7, 3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 12c0abd4d1c1b04a7663d04ba85268bc9ad9c017, 18d5547327c202cda33ad2bbd203220c2c62c8a7, 3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 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: wifi: cfg80211: check IP header size in cfg80211_classify8021d() A frame that looks like IP can be transmitted, but be too short, so the DS field is read incorrectly: BUG: KMSAN: uninit-value in cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027 cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027 ieee80211_select_queue+0x37a/0x9e0 net/mac80211/wme.c:180 __ieee80211_subif_start_xmit+0x60f/0x1d90 net/mac80211/tx.c:4304 ieee80211_subif_start_xmit+0xa8/0x6d0 net/mac80211/tx.c:4538 ... packet_sendmsg+0x9173/0xa2a0 net/packet/af_packet.c:3108 Use skb_header_pointer() like the MPLS case.

—No exploit Fix available
Published
Oct 6, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th 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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  • No public exploit code on record
  • A fix has been released

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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

    • 2.6.31affected
    • e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 and later · before 18d5547327c202cda33ad2bbd203220c2c62c8a7affected · git
    • e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 and later · before 3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734affected · git
    • e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 and later · before c4fbcf1e614ef0755fcc751fdfca21b0bf4e0ef7affected · git
    • e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 and later · before 12c0abd4d1c1b04a7663d04ba85268bc9ad9c017affected · git
    • e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 and later · before f33ad4e2f846e55cf4637419268f093ac9f1a765affected · git
    • e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 and later · before a2cdb4a675ca04c4ac8cc962848082d8ce065008affected · git
    • e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 and later · before 65893c8d28f239c7ddad5a83683be193a9133e9baffected · git
    • e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 and later · before 48b2c5c628b09cf36cbeca53e0432fc2a7518be7affected · git
    • before 2.6.31not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.8-17.2.8-1

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-2026-98343Oct 6, 2026 · dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()
    0Monitor
  • ← EarlierCVE-2026-98344Oct 6, 2026 · dmaengine: Fix device kref underflow in dma_chan_put()
    0Monitor
  • Later →CVE-2026-98346Oct 6, 2026 · wifi: cfg80211: don't get the radio mask for netdev-less wdevs
    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 Linux12c0abd4d1c1b04a7663d04ba85268bc9ad9c017Vendor (CNA)
Linux Linux18d5547327c202cda33ad2bbd203220c2c62c8a7Vendor (CNA)
Linux Linux3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734Vendor (CNA)
Linux Linux48b2c5c628b09cf36cbeca53e0432fc2a7518be7Vendor (CNA)
Linux Linux65893c8d28f239c7ddad5a83683be193a9133e9bVendor (CNA)
Linux Linuxa2cdb4a675ca04c4ac8cc962848082d8ce065008Vendor (CNA)
Linux Linuxc4fbcf1e614ef0755fcc751fdfca21b0bf4e0ef7Vendor (CNA)
Linux Linuxf33ad4e2f846e55cf4637419268f093ac9f1a765Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux7.2.8-1 · Debian:14Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package 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. TodayOct 29, 2026+23 d
EPSS, last 120 days

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

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

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.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

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

All records