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CVE-2026-72047· NVD / CVE Program· CNA Linux

ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit

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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 093aacb0c56d5c693e3169a0224062e77c3fd0c0, 1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe, 2059c28bd725beded01277cdf1f67be33e714323.

Low priority for now. Upgrade to Linux Linux 093aacb0c56d5c693e3169a0224062e77c3fd0c0, 1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe, 2059c28bd725beded01277cdf1f67be33e714323 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

In the Linux kernel, the following vulnerability has been resolved: ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit ca8210_test_int_driver_write() and ca8210_test_int_user_read() exchange a kmalloc'd buffer pointer through a struct kfifo, but pass a literal '4' as the byte count to kfifo_in()/kfifo_out(). This is correct on 32-bit (pointer = 4 bytes), but on 64-bit only the low 4 bytes of the 8-byte pointer are written into the FIFO. The reader then reads back 4 bytes into an 8-byte local pointer variable, leaving the upper 4 bytes uninitialized stack data. The first dereference of the reconstructed pointer (fifo_buffer[1]) accesses an arbitrary kernel address and generally results in an oops. Use sizeof(fifo_buffer) so the byte count matches pointer width on every architecture. The driver has no architecture restriction in Kconfig, so any 64-bit build with CONFIG_IEEE802154_CA8210_DEBUGFS=y is exposed. Issue has been latent since the driver was added in 2017 because it is most commonly deployed on 32-bit MCUs. Found via a custom Coccinelle semantic patch hunting for short-byte kfifo I/O on byte-mode kfifos used to shuttle pointers.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 17, 2026
EPSS
0.2% · 12th 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?

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.

—

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

    • 4.12affected
    • ded845a781a578dfb0b5b2c138e5a067aa3b1242 and later · before 2c1664ccfae653979b38788211240b5a1ee317edaffected · git
    • ded845a781a578dfb0b5b2c138e5a067aa3b1242 and later · before 093aacb0c56d5c693e3169a0224062e77c3fd0c0affected · git
    • ded845a781a578dfb0b5b2c138e5a067aa3b1242 and later · before 87dab14a4f68895d6f4d798e6ee3556cd64e8c72affected · git
    • ded845a781a578dfb0b5b2c138e5a067aa3b1242 and later · before 1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfeaffected · git
    • ded845a781a578dfb0b5b2c138e5a067aa3b1242 and later · before 65dc342274a01616f5c17105f7360a3b4bfd7a3daffected · git
    • ded845a781a578dfb0b5b2c138e5a067aa3b1242 and later · before 2059c28bd725beded01277cdf1f67be33e714323affected · git
    • ded845a781a578dfb0b5b2c138e5a067aa3b1242 and later · before d8ce67fa6a5e6929f5414e933ff9665176c2bce6affected · git
    • ded845a781a578dfb0b5b2c138e5a067aa3b1242 and later · before 6d7f7bcf225b2d566176bf6229dbd1252940cb3caffected · git
    • before 4.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

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 Linux093aacb0c56d5c693e3169a0224062e77c3fd0c0Vendor (CNA)
Linux Linux1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfeVendor (CNA)
Linux Linux2059c28bd725beded01277cdf1f67be33e714323Vendor (CNA)
Linux Linux2c1664ccfae653979b38788211240b5a1ee317edVendor (CNA)
Linux Linux65dc342274a01616f5c17105f7360a3b4bfd7a3dVendor (CNA)
Linux Linux6d7f7bcf225b2d566176bf6229dbd1252940cb3cVendor (CNA)
Linux Linux87dab14a4f68895d6f4d798e6ee3556cd64e8c72Vendor (CNA)
Linux Linuxd8ce67fa6a5e6929f5414e933ff9665176c2bce6Vendor (CNA)
debian:linux6.1.180-1 · 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.

No dated events beyond publication.

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. Fix✗ → ✓

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References

Show all references (7 more)

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

All records