{"api_version":"1","generated_at":"2026-08-22T17:47:31+00:00","cve":"CVE-2026-74733","urls":{"html":"https://cve.report/CVE-2026-74733","api":"https://cve.report/api/cve/CVE-2026-74733.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74733","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74733"},"summary":{"title":"gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock\n\nLocking is disabled in the regmap config as this driver uses its own\nlock. This means that all calls to regmap functions (read or write) must\nhold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do\nthis, and it was therefore possible that multiple threads could cause an\nincorrect register to be read/written.\n\nA previous patch partly fixed this, but only protected the write to the\ninterrupt mask register, and not the read from the direction register.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:48","updated_at":"2026-08-22 16:16:48"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585","name":"https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090","name":"https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74733","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74733","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bfc6444b57dc7186b6acc964705d7516cbaf3904 e6a2f5f845f50b0c4299bace5111f56d3390a090 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bfc6444b57dc7186b6acc964705d7516cbaf3904 9dc325327babe7f159e84cbe9380a45342da0585 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 58a5c93bd1a6e949267400080f07e57ffe05ec34 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e2ecdddca80dd845df42376e4b0197fe97018ba2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected de7cffa53149c7b48bd1bb29b02390c9f05b7f41 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.101 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.42 6.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.9.11 6.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpio/gpio-pca953x.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e6a2f5f845f50b0c4299bace5111f56d3390a090","status":"affected","version":"bfc6444b57dc7186b6acc964705d7516cbaf3904","versionType":"git"},{"lessThan":"9dc325327babe7f159e84cbe9380a45342da0585","status":"affected","version":"bfc6444b57dc7186b6acc964705d7516cbaf3904","versionType":"git"},{"status":"affected","version":"58a5c93bd1a6e949267400080f07e57ffe05ec34","versionType":"git"},{"status":"affected","version":"e2ecdddca80dd845df42376e4b0197fe97018ba2","versionType":"git"},{"status":"affected","version":"de7cffa53149c7b48bd1bb29b02390c9f05b7f41","versionType":"git"},{"lessThan":"6.2","status":"affected","version":"6.1.101","versionType":"semver"},{"lessThan":"6.7","status":"affected","version":"6.6.42","versionType":"semver"},{"lessThan":"6.10","status":"affected","version":"6.9.11","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpio/gpio-pca953x.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.10"},{"lessThan":"6.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.101","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.42","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock\n\nLocking is disabled in the regmap config as this driver uses its own\nlock. This means that all calls to regmap functions (read or write) must\nhold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do\nthis, and it was therefore possible that multiple threads could cause an\nincorrect register to be read/written.\n\nA previous patch partly fixed this, but only protected the write to the\ninterrupt mask register, and not the read from the direction register."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:33:21.579Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090"},{"url":"https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585"}],"title":"gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74733","datePublished":"2026-08-22T15:33:21.579Z","dateReserved":"2026-08-15T05:44:03.930Z","dateUpdated":"2026-08-22T15:33:21.579Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:48","lastModifiedDate":"2026-08-22 16:16:48","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74733","Ordinal":"1","Title":"gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock","CVE":"CVE-2026-74733","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74733","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock\n\nLocking is disabled in the regmap config as this driver uses its own\nlock. This means that all calls to regmap functions (read or write) must\nhold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do\nthis, and it was therefore possible that multiple threads could cause an\nincorrect register to be read/written.\n\nA previous patch partly fixed this, but only protected the write to the\ninterrupt mask register, and not the read from the direction register.","Type":"Description","Title":"gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock"}]}}}