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

CVE-2026-98887: wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO

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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7, 1ae85bb34fe3510659b86d6a5f8036dd498233f8, 3a96bb65b4b820d8b41fa155781ec1c29e3479d4; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7, 1ae85bb34fe3510659b86d6a5f8036dd498233f8, 3a96bb65b4b820d8b41fa155781ec1c29e3479d4; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1 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: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO hwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload to a struct hwsim_tx_rate * and unconditionally reads IEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds the attribute from above (NLA_BINARY .len is a maximum) and the op sets GENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is accepted and the loop reads past the payload. Require the exact length in the policy, so a malformed attribute is rejected before the handler runs.

—No exploit Fix available
Published
Oct 23, 2026
Updated
Oct 26, 2026
EPSS
0.2% · 11th 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 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • 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

    • 5.7affected
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 3a96bb65b4b820d8b41fa155781ec1c29e3479d4affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 59e1f2a0242232b4a3af144ae317d3913fc09046affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 1ae85bb34fe3510659b86d6a5f8036dd498233f8affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before b5b1234bbfa25537fb9a5c0d62c328ed4547f721affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 3dc723ac78a6e4fa0fd49e27e487ed319da40a9faffected · git
    • before 5.7not affected · semver
    • 5.10.271 and later · up to and including 5.10.*not 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:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-98885Oct 23, 2026 · ima: return error early if file xattr cannot be changed
    0Monitor
  • ← EarlierCVE-2026-98886Oct 23, 2026 · drm/gma500: return errors from Oaktrail HDMI I2C reads
    0Monitor
  • Later →CVE-2026-98888Oct 23, 2026 · arm64: kprobes: Allow reentering kprobes while single-stepping
    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 Linux13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7Vendor (CNA)
Linux Linux1ae85bb34fe3510659b86d6a5f8036dd498233f8Vendor (CNA)
Linux Linux3a96bb65b4b820d8b41fa155781ec1c29e3479d4Vendor (CNA)
Linux Linux3dc723ac78a6e4fa0fd49e27e487ed319da40a9fVendor (CNA)
Linux Linux59e1f2a0242232b4a3af144ae317d3913fc09046Vendor (CNA)
Linux Linux6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695Vendor (CNA)
Linux Linuxb5b1234bbfa25537fb9a5c0d62c328ed4547f721Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.159.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · 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 1, 2026+9 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

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 (6 more)

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

All records