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CVE-2026-90222· NVD / CVE Program· CNA Linux

nfc: pn533: hold a reference to the request skb during send_frame

In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: hold a reference to the request skb during send_frame __pn533_send_async() publishes the command and then calls dev->phy_ops->send_frame(). Once dev->cmd is set, an incoming frame can be matched to this command: the I2C threaded IRQ runs pn533_recv_frame(), which queues cmd_complete_work, and pn533_send_async_complete() frees cmd->req with consume_skb(). On the I2C transport, pn533_i2c_send_frame() still dereferences the same skb after i2c_master_send() returns, so a completion that races the send can free the skb while the transport is still using it. The request skb is owned by the command object and may be freed by command completion at any time after dev->cmd is published, so the transport send path must not assume it stays alive. Hold a temporary reference to the request skb across the send_frame() call so the transport always sees a live skb even if completion races the send. Add a pn533_send_cmd_frame() helper and use it from all three send paths.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Sep 17, 2026
EPSS
0.2% · 10th percentile
CWE
—
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Action score

0

Monitor

Low priority for now.

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

Noroxi analysis

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Affected systems

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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

    • 4.7affected
    • 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc and later · before 8710faddef4ad8b2a6bfa985d896e2e1bfb77018affected · git
    • 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc and later · before 19f1239758c23f087f4c25733cfcf62bf0b06051affected · git
    • 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc and later · before 7ee72c64b4b66b1b42dbddbca0a80a218f1b9297affected · git
    • 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc and later · before 753bdaf3220fe8371a6c3c75da645ea7753d11beaffected · git
    • 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc and later · before d329f61ad5786900334a54c2445dc99feda545bfaffected · git
    • 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc and later · before 7a8e0a7aef80721da287ac246349aba7d98f6aedaffected · git
    • 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc and later · before 3e7a093c177f9f8b9fd039cab41191515079425aaffected · git
    • 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc and later · before 47792358a624ea066455ef86b744159928cd7716affected · git
    • before 4.7not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxall versions—
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
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
  • 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 Linux19f1239758c23f087f4c25733cfcf62bf0b06051Vendor (CNA)
Linux Linux3e7a093c177f9f8b9fd039cab41191515079425aVendor (CNA)
Linux Linux47792358a624ea066455ef86b744159928cd7716Vendor (CNA)
Linux Linux753bdaf3220fe8371a6c3c75da645ea7753d11beVendor (CNA)
Linux Linux7a8e0a7aef80721da287ac246349aba7d98f6aedVendor (CNA)
Linux Linux7ee72c64b4b66b1b42dbddbca0a80a218f1b9297Vendor (CNA)
Linux Linux8710faddef4ad8b2a6bfa985d896e2e1bfb77018Vendor (CNA)
Linux Linuxd329f61ad5786900334a54c2445dc99feda545bfVendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~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.

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

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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.

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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)

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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

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

All records