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CVE-2026-98711

wifi: cw1200: fix TX padding OOB read leaking heap data to device

Products / packages Linux

Published

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Severity and exploitation

Not in CISA KEVNo CVSS score

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:25:33 UTC

Severity

unknown

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

In the Linux kernel, the following vulnerability has been resolved:

Source excerpt · Linux

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Linux · Linux

Linux

8 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

a910e4a94f6923c8c988565525f017f687bf7205 → before 8e8e4d0b15f174d964a48b1c54dc8828e5ae87c5

git versions

a910e4a94f6923c8c988565525f017f687bf7205 → before a7eae7547ae1443bfbca2cb90d3ef5e501d6445c

git versions

a910e4a94f6923c8c988565525f017f687bf7205 → before 5897945635aa5413595bf696127493be96c08e2d

git versions

a910e4a94f6923c8c988565525f017f687bf7205 → before b66539a4dab128fafaad736b53ce15c19d14d561

git versions

a910e4a94f6923c8c988565525f017f687bf7205 → before 71f693a0ecccf36532dd2790f7969da6c71d5d23

git versions

a910e4a94f6923c8c988565525f017f687bf7205 → before b0e97bd40e0c2cb1a3530ef8f6250aacf3224515

git versions

a910e4a94f6923c8c988565525f017f687bf7205 → before 678c8f4ba285649d5418a858d5d4f30c728a54ad

git versions

a910e4a94f6923c8c988565525f017f687bf7205 → before 7c1611780823b76219cb1478db53dfd890c4a9a2

git versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

10 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

3.11

unaffected

0 → before 3.11

semver versions

5.10.273 → through 5.10.*

semver versions

5.15.224 → through 5.15.*

semver versions

6.1.191 → through 6.1.*

semver versions

6.6.160 → through 6.6.*

semver versions

6.12.113 → through 6.12.*

semver versions

6.18.56 → through 6.18.*

semver versions

7.2.10 → through 7.2.*

semver versions

7.3 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

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.

References

8 sources
git.kernel.org/stable/c/8e8e4d0b15f174d964a48b1c54dc8828e5ae87c5
Source referenceLinux
git.kernel.org/stable/c/a7eae7547ae1443bfbca2cb90d3ef5e501d6445c
Source referenceLinux
git.kernel.org/stable/c/5897945635aa5413595bf696127493be96c08e2d
Source referenceLinux
git.kernel.org/stable/c/b66539a4dab128fafaad736b53ce15c19d14d561
Source referenceLinux
git.kernel.org/stable/c/71f693a0ecccf36532dd2790f7969da6c71d5d23
Source referenceLinux
git.kernel.org/stable/c/b0e97bd40e0c2cb1a3530ef8f6250aacf3224515
Source referenceLinux
View 2 more references
git.kernel.org/stable/c/678c8f4ba285649d5418a858d5d4f30c728a54ad
Source referenceLinux
git.kernel.org/stable/c/7c1611780823b76219cb1478db53dfd890c4a9a2
Source referenceLinux

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification · not supplied
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-98711

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

Linux · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.11

Before: 5.10.273

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.11

Before: 5.15.224

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.11

Before: 6.1.191

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.11

Before: 6.6.160

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.11

Before: 6.12.113

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.11

Before: 6.18.56

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.11

Before: 7.2.10

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.11

Before: 7.3

Applicability preview
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  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "vulnerable": true,
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            "vulnerable": true,
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          {
            "vulnerable": true,
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]
Contributing organizations · 1
Linux

Assigning organization

2026-10-30

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.