CVE-2026-43032 (GCVE-0-2026-43032)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-05-01 14:15
VLAI?
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 ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
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)
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    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)
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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nfc/pn533/uart.c"
          ],
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "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": "2026-05-01T14:15:31.921Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/23e925183db26cd322597679669ad29d70ed2ada"
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          "url": "https://git.kernel.org/stable/c/3adca9be14bf36b927193f05f5aea35a1a90e913"
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      "title": "NFC: pn533: bound the UART receive buffer",
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    "cveId": "CVE-2026-43032",
    "datePublished": "2026-05-01T14:15:31.921Z",
    "dateReserved": "2026-05-01T14:12:55.977Z",
    "dateUpdated": "2026-05-01T14:15:31.921Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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      "date": "2026-05-04",
      "epss": "0.00024",
      "percentile": "0.06795"
    },
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  }
}


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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

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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.



Detection rules are retrieved from Rulezet.