{"id":"CVE-2026-43032","state":"PUBLISHED","title":"NFC: pn533: bound the UART receive buffer","description":"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->recv_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.","publishedAt":"2026-05-01T14:15:31.921Z","updatedAt":"2026-05-11T22:16:23.913Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"8bedf1dd5640ac8997bff00bbefe241b438df397","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"23e925183db26cd322597679669ad29d70ed2ada","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"3adca9be14bf36b927193f05f5aea35a1a90e913","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"2c1fadd221b21d8038acfe6a0f56291881d5ff76","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"f48ab6ee654ecc350434e4566bc785773f412b7e","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"ad2f60de5045bfb5d20ea468a97c8760c6a3a4f8","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"cf2ff10183204349edfd6b972e189375fc5f1fb0","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"30fe3f5f6494f827d812ff179f295a8e532709d6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/pn533/uart.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/pn533/uart.c"]}],"references":["https://git.kernel.org/stable/c/8bedf1dd5640ac8997bff00bbefe241b438df397","https://git.kernel.org/stable/c/23e925183db26cd322597679669ad29d70ed2ada","https://git.kernel.org/stable/c/3adca9be14bf36b927193f05f5aea35a1a90e913","https://git.kernel.org/stable/c/2c1fadd221b21d8038acfe6a0f56291881d5ff76","https://git.kernel.org/stable/c/f48ab6ee654ecc350434e4566bc785773f412b7e","https://git.kernel.org/stable/c/ad2f60de5045bfb5d20ea468a97c8760c6a3a4f8","https://git.kernel.org/stable/c/cf2ff10183204349edfd6b972e189375fc5f1fb0","https://git.kernel.org/stable/c/30fe3f5f6494f827d812ff179f295a8e532709d6"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43032.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43032","state":"PUBLISHED","datePublished":"2026-05-01T14:15:31.921Z","dateUpdated":"2026-05-11T22:16:23.913Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.977Z"},"containers":{"cna":{"title":"NFC: pn533: bound the UART receive buffer","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->recv_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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"8bedf1dd5640ac8997bff00bbefe241b438df397","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"23e925183db26cd322597679669ad29d70ed2ada","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"3adca9be14bf36b927193f05f5aea35a1a90e913","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"2c1fadd221b21d8038acfe6a0f56291881d5ff76","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"f48ab6ee654ecc350434e4566bc785773f412b7e","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"ad2f60de5045bfb5d20ea468a97c8760c6a3a4f8","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"cf2ff10183204349edfd6b972e189375fc5f1fb0","versionType":"git"},{"version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","status":"affected","lessThan":"30fe3f5f6494f827d812ff179f295a8e532709d6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/pn533/uart.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/pn533/uart.c"]}],"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"},{"url":"https://git.kernel.org/stable/c/2c1fadd221b21d8038acfe6a0f56291881d5ff76"},{"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:16:23.913Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}