{"id":"CVE-2026-90192","state":"PUBLISHED","title":"mailbox: qcom-cpucp: handle NULL data in send_data callback","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: qcom-cpucp: handle NULL data in send_data callback\n\nmailbox_clear_channel() calls mbox_send_message() with NULL data to\nnotify the remote side that the RX channel has been cleared.\nqcom_cpucp_mbox_send_data() blindly dereferenced the data pointer,\ncausing a NULL pointer dereference kernel panic when invoked from\nthis path under PREEMPT_RT.\n\nAdd an explicit NULL check and return early without writing to the\nTX register, which is the correct behaviour for a channel-clear\nnotification.","publishedAt":"2026-09-17T16:07:12.995Z","updatedAt":"2026-10-19T08:59:28.843Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0e2a9a03106cd5fa0dbc9047675e7645c55e2669","status":"affected","lessThan":"3d11d2a6c9a10de287e0f1b53a5e65d16afe2760","versionType":"git"},{"version":"0e2a9a03106cd5fa0dbc9047675e7645c55e2669","status":"affected","lessThan":"413b0b94d6d06b8d49735280e86a01dac90cf177","versionType":"git"},{"version":"0e2a9a03106cd5fa0dbc9047675e7645c55e2669","status":"affected","lessThan":"b3d73e7440e0c40644285be1bda349cdf90122d8","versionType":"git"},{"version":"0e2a9a03106cd5fa0dbc9047675e7645c55e2669","status":"affected","lessThan":"fc4f2f99530298a1739226947aa76525142d421d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mailbox/qcom-cpucp-mbox.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mailbox/qcom-cpucp-mbox.c"]}],"references":["https://git.kernel.org/stable/c/3d11d2a6c9a10de287e0f1b53a5e65d16afe2760","https://git.kernel.org/stable/c/413b0b94d6d06b8d49735280e86a01dac90cf177","https://git.kernel.org/stable/c/b3d73e7440e0c40644285be1bda349cdf90122d8","https://git.kernel.org/stable/c/fc4f2f99530298a1739226947aa76525142d421d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90192.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90192","state":"PUBLISHED","datePublished":"2026-09-17T16:07:12.995Z","dateUpdated":"2026-10-19T08:59:28.843Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.792Z"},"containers":{"cna":{"title":"mailbox: qcom-cpucp: handle NULL data in send_data callback","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: qcom-cpucp: handle NULL data in send_data callback\n\nmailbox_clear_channel() calls mbox_send_message() with NULL data to\nnotify the remote side that the RX channel has been cleared.\nqcom_cpucp_mbox_send_data() blindly dereferenced the data pointer,\ncausing a NULL pointer dereference kernel panic when invoked from\nthis path under PREEMPT_RT.\n\nAdd an explicit NULL check and return early without writing to the\nTX register, which is the correct behaviour for a channel-clear\nnotification."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0e2a9a03106cd5fa0dbc9047675e7645c55e2669","status":"affected","lessThan":"3d11d2a6c9a10de287e0f1b53a5e65d16afe2760","versionType":"git"},{"version":"0e2a9a03106cd5fa0dbc9047675e7645c55e2669","status":"affected","lessThan":"413b0b94d6d06b8d49735280e86a01dac90cf177","versionType":"git"},{"version":"0e2a9a03106cd5fa0dbc9047675e7645c55e2669","status":"affected","lessThan":"b3d73e7440e0c40644285be1bda349cdf90122d8","versionType":"git"},{"version":"0e2a9a03106cd5fa0dbc9047675e7645c55e2669","status":"affected","lessThan":"fc4f2f99530298a1739226947aa76525142d421d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mailbox/qcom-cpucp-mbox.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mailbox/qcom-cpucp-mbox.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3d11d2a6c9a10de287e0f1b53a5e65d16afe2760"},{"url":"https://git.kernel.org/stable/c/413b0b94d6d06b8d49735280e86a01dac90cf177"},{"url":"https://git.kernel.org/stable/c/b3d73e7440e0c40644285be1bda349cdf90122d8"},{"url":"https://git.kernel.org/stable/c/fc4f2f99530298a1739226947aa76525142d421d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:59:28.843Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}