{"api_version":"1","generated_at":"2026-05-15T02:41:37+00:00","cve":"CVE-2026-31660","urls":{"html":"https://cve.report/CVE-2026-31660","api":"https://cve.report/api/cve/CVE-2026-31660.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31660","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31660"},"summary":{"title":"nfc: pn533: allocate rx skb before consuming bytes","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: pn533: allocate rx skb before consuming bytes\n\npn532_receive_buf() reports the number of accepted bytes to the serdev\ncore. The current code consumes bytes into recv_skb and may already hand\na complete frame to pn533_recv_frame() before allocating a fresh receive\nbuffer.\n\nIf that alloc_skb() fails, the callback returns 0 even though it has\nalready consumed bytes, and it leaves recv_skb as NULL for the next\nreceive callback. That breaks the receive_buf() accounting contract and\ncan also lead to a NULL dereference on the next skb_put_u8().\n\nAllocate the receive skb lazily before consuming the next byte instead.\nIf allocation fails, return the number of bytes already accepted.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-24 15:16:45","updated_at":"2026-04-27 20:17:30"},"problem_types":["NVD-CWE-Other"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/21ae2cda66a55c759607bbf1d23cbaa42019d2de","name":"https://git.kernel.org/stable/c/21ae2cda66a55c759607bbf1d23cbaa42019d2de","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7e37da42eda45d7859d9273fc7e225d8df458038","name":"https://git.kernel.org/stable/c/7e37da42eda45d7859d9273fc7e225d8df458038","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/16649adc2e19509104245ea1f349b629d858f11f","name":"https://git.kernel.org/stable/c/16649adc2e19509104245ea1f349b629d858f11f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8b71299d587d9e4c830c18afb884c80ddb30ad28","name":"https://git.kernel.org/stable/c/8b71299d587d9e4c830c18afb884c80ddb30ad28","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/07cb6c72e66ba548679f22ac29ad588da8999279","name":"https://git.kernel.org/stable/c/07cb6c72e66ba548679f22ac29ad588da8999279","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a9495069b43b8634c1ae0042e888766c34f66637","name":"https://git.kernel.org/stable/c/a9495069b43b8634c1ae0042e888766c34f66637","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c71ba669b570c7b3f86ec875be222ea11dacb352","name":"https://git.kernel.org/stable/c/c71ba669b570c7b3f86ec875be222ea11dacb352","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb","name":"https://git.kernel.org/stable/c/2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31660","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31660","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 8b71299d587d9e4c830c18afb884c80ddb30ad28 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 16649adc2e19509104245ea1f349b629d858f11f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 07cb6c72e66ba548679f22ac29ad588da8999279 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 a9495069b43b8634c1ae0042e888766c34f66637 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 21ae2cda66a55c759607bbf1d23cbaa42019d2de git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 7e37da42eda45d7859d9273fc7e225d8df458038 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 c71ba669b570c7b3f86ec875be222ea11dacb352 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.253 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.169 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.135 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.82 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.23 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.13 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"31660","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"31660","cve":"CVE-2026-31660","epss":"0.000240000","percentile":"0.067850000","score_date":"2026-04-27","updated_at":"2026-04-28 00:06:44"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/nfc/pn533/uart.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb","status":"affected","version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","versionType":"git"},{"lessThan":"8b71299d587d9e4c830c18afb884c80ddb30ad28","status":"affected","version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","versionType":"git"},{"lessThan":"16649adc2e19509104245ea1f349b629d858f11f","status":"affected","version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","versionType":"git"},{"lessThan":"07cb6c72e66ba548679f22ac29ad588da8999279","status":"affected","version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","versionType":"git"},{"lessThan":"a9495069b43b8634c1ae0042e888766c34f66637","status":"affected","version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","versionType":"git"},{"lessThan":"21ae2cda66a55c759607bbf1d23cbaa42019d2de","status":"affected","version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","versionType":"git"},{"lessThan":"7e37da42eda45d7859d9273fc7e225d8df458038","status":"affected","version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","versionType":"git"},{"lessThan":"c71ba669b570c7b3f86ec875be222ea11dacb352","status":"affected","version":"c656aa4c27b17a8c70da223ed5ab42145800d6b5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/nfc/pn533/uart.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.5"},{"lessThan":"5.5","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.169","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.135","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.82","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.23","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.169","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.135","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.82","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.23","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.13","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"5.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: pn533: allocate rx skb before consuming bytes\n\npn532_receive_buf() reports the number of accepted bytes to the serdev\ncore. The current code consumes bytes into recv_skb and may already hand\na complete frame to pn533_recv_frame() before allocating a fresh receive\nbuffer.\n\nIf that alloc_skb() fails, the callback returns 0 even though it has\nalready consumed bytes, and it leaves recv_skb as NULL for the next\nreceive callback. That breaks the receive_buf() accounting contract and\ncan also lead to a NULL dereference on the next skb_put_u8().\n\nAllocate the receive skb lazily before consuming the next byte instead.\nIf allocation fails, return the number of bytes already accepted."}],"providerMetadata":{"dateUpdated":"2026-04-24T14:45:11.039Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb"},{"url":"https://git.kernel.org/stable/c/8b71299d587d9e4c830c18afb884c80ddb30ad28"},{"url":"https://git.kernel.org/stable/c/16649adc2e19509104245ea1f349b629d858f11f"},{"url":"https://git.kernel.org/stable/c/07cb6c72e66ba548679f22ac29ad588da8999279"},{"url":"https://git.kernel.org/stable/c/a9495069b43b8634c1ae0042e888766c34f66637"},{"url":"https://git.kernel.org/stable/c/21ae2cda66a55c759607bbf1d23cbaa42019d2de"},{"url":"https://git.kernel.org/stable/c/7e37da42eda45d7859d9273fc7e225d8df458038"},{"url":"https://git.kernel.org/stable/c/c71ba669b570c7b3f86ec875be222ea11dacb352"}],"title":"nfc: pn533: allocate rx skb before consuming bytes","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31660","datePublished":"2026-04-24T14:45:11.039Z","dateReserved":"2026-03-09T15:48:24.129Z","dateUpdated":"2026-04-24T14:45:11.039Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-24 15:16:45","lastModifiedDate":"2026-04-27 20:17:30","problem_types":["NVD-CWE-Other"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5.1","versionEndExcluding":"5.10.253","matchCriteriaId":"45E871E1-B00E-4E88-83A3-60B38EAF2B8A"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.203","matchCriteriaId":"20DDB3E9-AABF-4107-ADB0-5362AA067045"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.169","matchCriteriaId":"DBEC0E5D-641C-4E98-A6D9-5799B10CE451"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.135","matchCriteriaId":"15C1A1B2-14EE-494C-AF3E-D5A7BA640B39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.82","matchCriteriaId":"02904CAE-71D2-45B3-9EC3-F6A9D18B6307"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.23","matchCriteriaId":"E9E09FDD-9EE3-4A56-92E2-2B30AFD0072F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.13","matchCriteriaId":"1490EF9B-9080-481C-8D22-1306AAE664E4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.5:-:*:*:*:*:*:*","matchCriteriaId":"EE98F46A-F7D9-4609-B6A0-882E7F0D378C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*","matchCriteriaId":"F253B622-8837-4245-BCE5-A7BF8FC76A16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*","matchCriteriaId":"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*","matchCriteriaId":"F666C8D8-6538-46D4-B318-87610DE64C34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*","matchCriteriaId":"02259FDA-961B-47BC-AE7F-93D7EC6E90C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*","matchCriteriaId":"58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*","matchCriteriaId":"1D2315C0-D46F-4F85-9754-F9E5E11374A6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*","matchCriteriaId":"512EE3A8-A590-4501-9A94-5D4B268D6138"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31660","Ordinal":"1","Title":"nfc: pn533: allocate rx skb before consuming bytes","CVE":"CVE-2026-31660","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31660","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: pn533: allocate rx skb before consuming bytes\n\npn532_receive_buf() reports the number of accepted bytes to the serdev\ncore. The current code consumes bytes into recv_skb and may already hand\na complete frame to pn533_recv_frame() before allocating a fresh receive\nbuffer.\n\nIf that alloc_skb() fails, the callback returns 0 even though it has\nalready consumed bytes, and it leaves recv_skb as NULL for the next\nreceive callback. That breaks the receive_buf() accounting contract and\ncan also lead to a NULL dereference on the next skb_put_u8().\n\nAllocate the receive skb lazily before consuming the next byte instead.\nIf allocation fails, return the number of bytes already accepted.","Type":"Description","Title":"nfc: pn533: allocate rx skb before consuming bytes"}]}}}