CVE-2026-31660 (GCVE-0-2026-31660)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:45 – Updated: 2026-04-24 14:45
VLAI?
Title
nfc: pn533: allocate rx skb before consuming bytes
Summary
In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: allocate rx skb before consuming bytes pn532_receive_buf() reports the number of accepted bytes to the serdev core. The current code consumes bytes into recv_skb and may already hand a complete frame to pn533_recv_frame() before allocating a fresh receive buffer. If that alloc_skb() fails, the callback returns 0 even though it has already consumed bytes, and it leaves recv_skb as NULL for the next receive callback. That breaks the receive_buf() accounting contract and can also lead to a NULL dereference on the next skb_put_u8(). Allocate the receive skb lazily before consuming the next byte instead. If allocation fails, return the number of bytes already accepted.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb (git)
Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 8b71299d587d9e4c830c18afb884c80ddb30ad28 (git)
Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 16649adc2e19509104245ea1f349b629d858f11f (git)
Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 07cb6c72e66ba548679f22ac29ad588da8999279 (git)
Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < a9495069b43b8634c1ae0042e888766c34f66637 (git)
Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 21ae2cda66a55c759607bbf1d23cbaa42019d2de (git)
Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < 7e37da42eda45d7859d9273fc7e225d8df458038 (git)
Affected: c656aa4c27b17a8c70da223ed5ab42145800d6b5 , < c71ba669b570c7b3f86ec875be222ea11dacb352 (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: 6.1.169 , ≤ 6.1.* (semver)
Unaffected: 6.6.135 , ≤ 6.6.* (semver)
Unaffected: 6.12.82 , ≤ 6.12.* (semver)
Unaffected: 6.18.23 , ≤ 6.18.* (semver)
Unaffected: 6.19.13 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/nfc/pn533/uart.c"
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T14:45:11.039Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "dateReserved": "2026-03-09T15:48:24.129Z",
    "dateUpdated": "2026-04-24T14:45:11.039Z",
    "state": "PUBLISHED"
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  }
}


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  • 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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