{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43380","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:56.006Z","datePublished":"2026-05-08T14:21:28.702Z","dateUpdated":"2026-05-11T22:23:28.160Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:23:28.160Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/q54sj108a2) fix stack overflow in debugfs read\n\nThe q54sj108a2_debugfs_read function suffers from a stack buffer overflow\ndue to incorrect arguments passed to bin2hex(). The function currently\npasses 'data' as the destination and 'data_char' as the source.\n\nBecause bin2hex() converts each input byte into two hex characters, a\n32-byte block read results in 64 bytes of output. Since 'data' is only\n34 bytes (I2C_SMBUS_BLOCK_MAX + 2), this writes 30 bytes past the end\nof the buffer onto the stack.\n\nAdditionally, the arguments were swapped: it was reading from the\nzero-initialized 'data_char' and writing to 'data', resulting in\nall-zero output regardless of the actual I2C read.\n\nFix this by:\n1. Expanding 'data_char' to 66 bytes to safely hold the hex output.\n2. Correcting the bin2hex() argument order and using the actual read count.\n3. Using a pointer to select the correct output buffer for the final\n   simple_read_from_buffer call."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/pmbus/q54sj108a2.c"],"versions":[{"version":"d014538aa38561cd24c5eb228223585f26c5ec71","lessThan":"a0fc1b9c738fba231f190ab960c83202722efee5","status":"affected","versionType":"git"},{"version":"d014538aa38561cd24c5eb228223585f26c5ec71","lessThan":"c59090c50f62a17129fc4c5407bc4071305a9e82","status":"affected","versionType":"git"},{"version":"d014538aa38561cd24c5eb228223585f26c5ec71","lessThan":"52db5ef163c96f916d424e472fb17aadc35a9f7a","status":"affected","versionType":"git"},{"version":"d014538aa38561cd24c5eb228223585f26c5ec71","lessThan":"b48a0f8d4541a4f6651dc9a64430ce9fdf5c120b","status":"affected","versionType":"git"},{"version":"d014538aa38561cd24c5eb228223585f26c5ec71","lessThan":"73a7a345816946d276ad2c46c8bb771de67cfc46","status":"affected","versionType":"git"},{"version":"d014538aa38561cd24c5eb228223585f26c5ec71","lessThan":"24a7b9daa103fa963b3fd37d8805b23e01621976","status":"affected","versionType":"git"},{"version":"d014538aa38561cd24c5eb228223585f26c5ec71","lessThan":"25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/pmbus/q54sj108a2.c"],"versions":[{"version":"5.11","status":"affected"},{"version":"0","lessThan":"5.11","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.167","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.130","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.78","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.19","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.9","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.1.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.12.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.18.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.19.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/a0fc1b9c738fba231f190ab960c83202722efee5"},{"url":"https://git.kernel.org/stable/c/c59090c50f62a17129fc4c5407bc4071305a9e82"},{"url":"https://git.kernel.org/stable/c/52db5ef163c96f916d424e472fb17aadc35a9f7a"},{"url":"https://git.kernel.org/stable/c/b48a0f8d4541a4f6651dc9a64430ce9fdf5c120b"},{"url":"https://git.kernel.org/stable/c/73a7a345816946d276ad2c46c8bb771de67cfc46"},{"url":"https://git.kernel.org/stable/c/24a7b9daa103fa963b3fd37d8805b23e01621976"},{"url":"https://git.kernel.org/stable/c/25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43"}],"title":"hwmon: (pmbus/q54sj108a2) fix stack overflow in debugfs read","x_generator":{"engine":"bippy-1.2.0"}}}}