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

CVE-2026-98711: wifi: cw1200: fix TX padding OOB read leaking heap data to device

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 5897945635aa5413595bf696127493be96c08e2d, 678c8f4ba285649d5418a858d5d4f30c728a54ad, 71f693a0ecccf36532dd2790f7969da6c71d5d23; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 5897945635aa5413595bf696127493be96c08e2d, 678c8f4ba285649d5418a858d5d4f30c728a54ad, 71f693a0ecccf36532dd2790f7969da6c71d5d23; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 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: wifi: cw1200: fix TX padding OOB read leaking heap data to device The TX path rounds the transfer size up to the bus alignment (align_size(), up to 511 bytes for SDIO, 1 byte for SPI) but sends the padded length straight from the frame buffer, which has no room reserved for the padding. cw1200_data_write() therefore reads past the end of the frame and the bus transfer carries those bytes to the device. A bogus device can collect up to 511 bytes of kernel heap data per TX frame. The RX path does not have this problem: it allocates the skb with the aligned length (alloc_len) before reading. Compute the exact padding with the bus align_size() callback, make sure queued TX frames have tailroom for it, and zero the padding bytes before the transfer so nothing past the frame is exposed. This is not expected to change driver behavior on most cases: frame contents and transfer sizes are unchanged, only the content of the padding bytes (previously undefined stale memory, now zero), which the device never reads since the WSM header carries the real frame length. The skb expansion can only fail under memory exhaustion, in which case the frame is dropped like on the existing error paths of cw1200_tx(). Discovered by Atuin - Automated Vulnerability Discovery Engine.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 30, 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

    • 3.11affected
    • a910e4a94f6923c8c988565525f017f687bf7205 and later · before 8e8e4d0b15f174d964a48b1c54dc8828e5ae87c5affected · git
    • a910e4a94f6923c8c988565525f017f687bf7205 and later · before a7eae7547ae1443bfbca2cb90d3ef5e501d6445caffected · git
    • a910e4a94f6923c8c988565525f017f687bf7205 and later · before 5897945635aa5413595bf696127493be96c08e2daffected · git
    • a910e4a94f6923c8c988565525f017f687bf7205 and later · before b66539a4dab128fafaad736b53ce15c19d14d561affected · git
    • a910e4a94f6923c8c988565525f017f687bf7205 and later · before 71f693a0ecccf36532dd2790f7969da6c71d5d23affected · git
    • a910e4a94f6923c8c988565525f017f687bf7205 and later · before b0e97bd40e0c2cb1a3530ef8f6250aacf3224515affected · git
    • a910e4a94f6923c8c988565525f017f687bf7205 and later · before 678c8f4ba285649d5418a858d5d4f30c728a54adaffected · git
    • a910e4a94f6923c8c988565525f017f687bf7205 and later · before 7c1611780823b76219cb1478db53dfd890c4a9a2affected · git
    • before 3.11not 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:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.10-17.2.10-1

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-2026-98709Oct 18, 2026 · wifi: mac80211: count only matching reservations in reserved switch
    0Monitor
  • ← EarlierCVE-2026-98710Oct 18, 2026 · wifi: iwlegacy: 3945: free EEPROM data on remove
    0Monitor
  • Later →CVE-2026-98712Oct 18, 2026 · KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq
    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 Linux5897945635aa5413595bf696127493be96c08e2dVendor (CNA)
Linux Linux678c8f4ba285649d5418a858d5d4f30c728a54adVendor (CNA)
Linux Linux71f693a0ecccf36532dd2790f7969da6c71d5d23Vendor (CNA)
Linux Linux7c1611780823b76219cb1478db53dfd890c4a9a2Vendor (CNA)
Linux Linux8e8e4d0b15f174d964a48b1c54dc8828e5ae87c5Vendor (CNA)
Linux Linuxa7eae7547ae1443bfbca2cb90d3ef5e501d6445cVendor (CNA)
Linux Linuxb0e97bd40e0c2cb1a3530ef8f6250aacf3224515Vendor (CNA)
Linux Linuxb66539a4dab128fafaad736b53ce15c19d14d561Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package 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. TodayNov 7, 2026+19 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