NFC: pn533: bound the UART receive buffer

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Summary

CVECVE-2026-43032
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-01 15:16:47 UTC
Updated2026-05-08 18:39:32 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000240000 probability, percentile 0.068060000 (date 2026-05-05)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 8bedf1dd5640ac8997bff00bbefe241b438df397 git Not specified
CNA Linux Linux affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 23e925183db26cd322597679669ad29d70ed2ada git Not specified
CNA Linux Linux affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 3adca9be14bf36b927193f05f5aea35a1a90e913 git Not specified
CNA Linux Linux affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 2c1fadd221b21d8038acfe6a0f56291881d5ff76 git Not specified
CNA Linux Linux affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 f48ab6ee654ecc350434e4566bc785773f412b7e git Not specified
CNA Linux Linux affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 ad2f60de5045bfb5d20ea468a97c8760c6a3a4f8 git Not specified
CNA Linux Linux affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 cf2ff10183204349edfd6b972e189375fc5f1fb0 git Not specified
CNA Linux Linux affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 30fe3f5f6494f827d812ff179f295a8e532709d6 git Not specified
CNA Linux Linux affected 5.5 Not specified
CNA Linux Linux unaffected 5.5 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.134 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.81 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.22 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.12 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/23e925183db26cd322597679669ad29d70ed2ada 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cf2ff10183204349edfd6b972e189375fc5f1fb0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/30fe3f5f6494f827d812ff179f295a8e532709d6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f48ab6ee654ecc350434e4566bc785773f412b7e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8bedf1dd5640ac8997bff00bbefe241b438df397 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2c1fadd221b21d8038acfe6a0f56291881d5ff76 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3adca9be14bf36b927193f05f5aea35a1a90e913 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ad2f60de5045bfb5d20ea468a97c8760c6a3a4f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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