CVE-2026-43032 (GCVE-0-2026-43032)
Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-05-11 22:16
VLAI
EPSS
VEX
Title
NFC: pn533: bound the UART receive buffer
Summary
In the Linux kernel, the following vulnerability has been resolved:
NFC: pn533: bound the UART receive buffer
pn532_receive_buf() appends every incoming byte to dev->recv_skb and
only resets the buffer after pn532_uart_rx_is_frame() recognizes a
complete frame. A continuous stream of bytes without a valid PN532 frame
header therefore keeps growing the skb until skb_put_u8() hits the tail
limit.
Drop the accumulated partial frame once the fixed receive buffer is full
so malformed UART traffic cannot grow the skb past
PN532_UART_SKB_BUFF_LEN.
Severity
5.5 (Medium)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 8bedf1dd5640ac8997bff00bbefe241b438df397
(git)
Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 23e925183db26cd322597679669ad29d70ed2ada (git) Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 3adca9be14bf36b927193f05f5aea35a1a90e913 (git) Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 2c1fadd221b21d8038acfe6a0f56291881d5ff76 (git) Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < f48ab6ee654ecc350434e4566bc785773f412b7e (git) Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < ad2f60de5045bfb5d20ea468a97c8760c6a3a4f8 (git) Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < cf2ff10183204349edfd6b972e189375fc5f1fb0 (git) Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 30fe3f5f6494f827d812ff179f295a8e532709d6 (git) |
guessed | |
| Linux | Linux |
Affected:
5.5
Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.168 , ≤ 6.1.* (semver) Unaffected: 6.6.134 , ≤ 6.6.* (semver) Unaffected: 6.12.81 , ≤ 6.12.* (semver) Unaffected: 6.18.22 , ≤ 6.18.* (semver) Unaffected: 6.19.12 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
{
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{
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{
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFC: pn533: bound the UART receive buffer\n\npn532_receive_buf() appends every incoming byte to dev-\u003erecv_skb and\nonly resets the buffer after pn532_uart_rx_is_frame() recognizes a\ncomplete frame. A continuous stream of bytes without a valid PN532 frame\nheader therefore keeps growing the skb until skb_put_u8() hits the tail\nlimit.\n\nDrop the accumulated partial frame once the fixed receive buffer is full\nso malformed UART traffic cannot grow the skb past\nPN532_UART_SKB_BUFF_LEN."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T22:16:23.913Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/8bedf1dd5640ac8997bff00bbefe241b438df397"
},
{
"url": "https://git.kernel.org/stable/c/23e925183db26cd322597679669ad29d70ed2ada"
},
{
"url": "https://git.kernel.org/stable/c/3adca9be14bf36b927193f05f5aea35a1a90e913"
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{
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},
{
"url": "https://git.kernel.org/stable/c/f48ab6ee654ecc350434e4566bc785773f412b7e"
},
{
"url": "https://git.kernel.org/stable/c/ad2f60de5045bfb5d20ea468a97c8760c6a3a4f8"
},
{
"url": "https://git.kernel.org/stable/c/cf2ff10183204349edfd6b972e189375fc5f1fb0"
},
{
"url": "https://git.kernel.org/stable/c/30fe3f5f6494f827d812ff179f295a8e532709d6"
}
],
"title": "NFC: pn533: bound the UART receive buffer",
"x_generator": {
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"cveId": "CVE-2026-43032",
"datePublished": "2026-05-01T14:15:31.921Z",
"dateReserved": "2026-05-01T14:12:55.977Z",
"dateUpdated": "2026-05-11T22:16:23.913Z",
"state": "PUBLISHED"
},
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"vulnerability-lookup:meta": {
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"date": "2026-09-16",
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A continuous stream of bytes without a valid PN532 frame\\nheader therefore keeps growing the skb until skb_put_u8() hits the tail\\nlimit.\\n\\nDrop the accumulated partial frame once the fixed receive buffer is full\\nso malformed UART traffic cannot grow the skb 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"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-28T11:20:28+00:00",
"cve": "CVE-2026-43032",
"id": "CVE-2026-43032",
"initial_release_date": "2026-05-01T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: NFC: pn533: bound the UART receive buffer",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43032.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-31T17:11:13Z",
"cve": "CVE-2026-43032",
"id": "CVE-2026-43032",
"initial_release_date": "2026-05-06T01:41:09Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "528",
"product_status:known_not_affected": "188",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-43032",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43032.json",
"version": "7"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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