{"id":"CVE-2025-22084","state":"PUBLISHED","title":"w1: fix NULL pointer dereference in probe","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nw1: fix NULL pointer dereference in probe\n\nThe w1_uart_probe() function calls w1_uart_serdev_open() (which includes\ndevm_serdev_device_open()) before setting the client ops via\nserdev_device_set_client_ops(). This ordering can trigger a NULL pointer\ndereference in the serdev controller's receive_buf handler, as it assumes\nserdev->ops is valid when SERPORT_ACTIVE is set.\n\nThis is similar to the issue fixed in commit 5e700b384ec1\n(\"platform/chrome: cros_ec_uart: properly fix race condition\") where\ndevm_serdev_device_open() was called before fully initializing the\ndevice.\n\nFix the race by ensuring client ops are set before enabling the port via\nw1_uart_serdev_open().","publishedAt":"2025-04-16T14:12:32.950Z","updatedAt":"2026-05-11T21:12:20.957Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a3c08804364e80328a9ffdac59bb26676b938195","status":"affected","lessThan":"4f750b84628080ff0d67bf1af67a4967b740acf2","versionType":"git"},{"version":"a3c08804364e80328a9ffdac59bb26676b938195","status":"affected","lessThan":"64ab50577c59bb7049bec6b5c42d1c38e4029f29","versionType":"git"},{"version":"a3c08804364e80328a9ffdac59bb26676b938195","status":"affected","lessThan":"cc6b0ec7cccbf66ef3621e9e93296b7bd1f52298","versionType":"git"},{"version":"a3c08804364e80328a9ffdac59bb26676b938195","status":"affected","lessThan":"0dd6770a72f138dabea9eae87f3da6ffa68f0d06","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/w1/masters/w1-uart.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.23","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.11","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14.2","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/w1/masters/w1-uart.c"]}],"references":["https://git.kernel.org/stable/c/4f750b84628080ff0d67bf1af67a4967b740acf2","https://git.kernel.org/stable/c/64ab50577c59bb7049bec6b5c42d1c38e4029f29","https://git.kernel.org/stable/c/cc6b0ec7cccbf66ef3621e9e93296b7bd1f52298","https://git.kernel.org/stable/c/0dd6770a72f138dabea9eae87f3da6ffa68f0d06"],"weaknesses":[],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/22xxx/CVE-2025-22084.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-22084","state":"PUBLISHED","datePublished":"2025-04-16T14:12:32.950Z","dateUpdated":"2026-05-11T21:12:20.957Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T08:45:45.816Z"},"containers":{"cna":{"title":"w1: fix NULL pointer dereference in probe","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nw1: fix NULL pointer dereference in probe\n\nThe w1_uart_probe() function calls w1_uart_serdev_open() (which includes\ndevm_serdev_device_open()) before setting the client ops via\nserdev_device_set_client_ops(). This ordering can trigger a NULL pointer\ndereference in the serdev controller's receive_buf handler, as it assumes\nserdev->ops is valid when SERPORT_ACTIVE is set.\n\nThis is similar to the issue fixed in commit 5e700b384ec1\n(\"platform/chrome: cros_ec_uart: properly fix race condition\") where\ndevm_serdev_device_open() was called before fully initializing the\ndevice.\n\nFix the race by ensuring client ops are set before enabling the port via\nw1_uart_serdev_open()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a3c08804364e80328a9ffdac59bb26676b938195","status":"affected","lessThan":"4f750b84628080ff0d67bf1af67a4967b740acf2","versionType":"git"},{"version":"a3c08804364e80328a9ffdac59bb26676b938195","status":"affected","lessThan":"64ab50577c59bb7049bec6b5c42d1c38e4029f29","versionType":"git"},{"version":"a3c08804364e80328a9ffdac59bb26676b938195","status":"affected","lessThan":"cc6b0ec7cccbf66ef3621e9e93296b7bd1f52298","versionType":"git"},{"version":"a3c08804364e80328a9ffdac59bb26676b938195","status":"affected","lessThan":"0dd6770a72f138dabea9eae87f3da6ffa68f0d06","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/w1/masters/w1-uart.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.23","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.11","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14.2","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/w1/masters/w1-uart.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/4f750b84628080ff0d67bf1af67a4967b740acf2"},{"url":"https://git.kernel.org/stable/c/64ab50577c59bb7049bec6b5c42d1c38e4029f29"},{"url":"https://git.kernel.org/stable/c/cc6b0ec7cccbf66ef3621e9e93296b7bd1f52298"},{"url":"https://git.kernel.org/stable/c/0dd6770a72f138dabea9eae87f3da6ffa68f0d06"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:12:20.957Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.12.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.13.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.14.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}