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NVD / CVE Program· CNA Linux

CVE-2026-63869: wifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap

HighCVSS 7.6 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

  • 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: 0.25% (FIRST EPSS).
  • Someone on the same network segment can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 033ce021a220913ac02416fcb5ac883a9ff8b6c7, 6c0cf89f36ac0c0fd8687a4ccdce2efb23a9c663, 9b40c59bab08f2a99abf969cc0bb92fa49de004b.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 033ce021a220913ac02416fcb5ac883a9ff8b6c7, 6c0cf89f36ac0c0fd8687a4ccdce2efb23a9c663, 9b40c59bab08f2a99abf969cc0bb92fa49de004b 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: limit injected antenna index in ieee80211_parse_tx_radiotap When parsing the radiotap header of an injected frame, ieee80211_parse_tx_radiotap() uses the IEEE80211_RADIOTAP_ANTENNA value directly as a shift count: info->control.antennas |= BIT(*iterator.this_arg); *iterator.this_arg is an 8-bit value taken straight from the frame supplied by userspace, so BIT() can be asked to shift by up to 255. That is undefined behaviour on the unsigned long and is reported by UBSAN: UBSAN: shift-out-of-bounds in net/mac80211/tx.c:2174:30 shift exponent 235 is too large for 64-bit type 'unsigned long' Call Trace: ieee80211_parse_tx_radiotap+0xadb/0x1950 net/mac80211/tx.c:2174 ieee80211_monitor_start_xmit+0xb1f/0x1250 net/mac80211/tx.c:2451 ... packet_sendmsg+0x3eb6/0x50f0 net/packet/af_packet.c:3109 info->control.antennas is a 2-bit bitmap (u8 antennas:2), so only antenna indices 0 and 1 can ever be represented. Ignore any larger value instead of shifting out of bounds.

Published
Jul 19, 2026
Updated
Oct 26, 2026
EPSS
0.2% · 17th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.6
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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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?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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.

VendorProduct
linuxlinux kernel

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

    • 6.7affected
    • ef246a1480cc484cd2aeda75737cb0848616ddf3 and later · before f6d3dc8e8492bf8435e0b23c99472af7bafd6b44affected · git
    • ef246a1480cc484cd2aeda75737cb0848616ddf3 and later · before 9b40c59bab08f2a99abf969cc0bb92fa49de004baffected · git
    • ef246a1480cc484cd2aeda75737cb0848616ddf3 and later · before 033ce021a220913ac02416fcb5ac883a9ff8b6c7affected · git
    • ef246a1480cc484cd2aeda75737cb0848616ddf3 and later · before 6c0cf89f36ac0c0fd8687a4ccdce2efb23a9c663affected · git
    • before 6.7not affected · semver
    • 6.12.94 and later · up to and including 6.12.*not affected · semver
    • 6.18.36 and later · up to and including 6.18.*not affected · semver
    • 7.0.13 and later · up to and including 7.0.*not affected · semver
    • 7.1 and laternot affected · original_commit_for_fix
Affected versions · NVD (4)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel6.7 and later · before 6.12.94
  • linux linux kernel6.13 and later · before 6.18.36
  • linux linux kernel6.19 and later · before 7.0.13
  • linux linux kernel7.1

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-63867Jul 19, 2026 · mptcp: close TOCTOU race while computing rcv_wnd
    32Monitor
  • ← EarlierCVE-2026-63868Jul 19, 2026 · net: garp: fix unsigned integer underflow in garp_pdu_parse_attr
    22Monitor
  • Later →CVE-2026-63870Jul 19, 2026 · ieee802154: 6lowpan: only accept IPv6 packets in lowpan_xmit()
    31Monitor

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 Linux033ce021a220913ac02416fcb5ac883a9ff8b6c7Vendor (CNA)
Linux Linux6c0cf89f36ac0c0fd8687a4ccdce2efb23a9c663Vendor (CNA)
Linux Linux9b40c59bab08f2a99abf969cc0bb92fa49de004bVendor (CNA)
Linux Linuxf6d3dc8e8492bf8435e0b23c99472af7bafd6b44Vendor (CNA)
almalinux:kernel6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-core6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-core6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-devel6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules-core6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-devel6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-devel-matched6.12.0-211.56.1.el10_2 · AlmaLinux:10Package registry (OSV)
debian:linux6.12.94-1 · Debian:13Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel-matched0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debuginfo0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel-matched0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-debuginfo0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-devel0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-devel-matched0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debuginfo0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debuginfo-common-aarch640:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debuginfo-common-ppc64le0:6.12.0-211.56.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
rocky linux:kernel0:6.12.0-211.56.1.el10_2.0.1 · Rocky Linux:10Package 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.

No dated events beyond publication.

EPSS, last 120 days

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

Variant candidates

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

  • CVE-2026-5290540 days apartmm/damon/core: disallow non-power of two min_region_sz on damon_start()
    22Monitor
  • CVE-2025-39700317 days apartmm/damon/ops-common: ignore migration request to invalid nodes
    22Monitor
  • CVE-2022-50020396 days apartext4: avoid resizing to a partial cluster size
    22Monitor

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 · public bounty program.

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
Low

Weakness class (CWE)

CWE-1284 · Improper Validation of Specified Quantity in Input

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

nvd-secondary

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 (3 more)

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

All records