{"id":"CVE-2026-64602","state":"PUBLISHED","title":"iio: adc: spear: Initialize completion before requesting IRQ","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: spear: Initialize completion before requesting IRQ\n\nIn the report from Jaeyoung Chung:\n\n\"spear_adc_probe() in drivers/iio/adc/spear_adc.c registers its\ninterrupt handler with devm_request_irq() before it initializes\nst->completion with init_completion(). If an interrupt arrives after\ndevm_request_irq() and before init_completion(), the handler calls\ncomplete() on an uninitialized completion, causing a kernel panic.\n\nThe probe path, in spear_adc_probe():\n\n    iodev = devm_iio_device_alloc(&pdev->dev, sizeof(*st)); /* st kzalloc-zeroed */\n    ...\n    retval = devm_request_irq(&pdev->dev, irq, spear_adc_isr, 0,\n                              LPC32XXAD_NAME, st);           /* register handler */\n    ...\n    init_completion(&st->completion);                       /* initialize completion */\n\nspear_adc_isr() calls complete():\n\n    complete(&st->completion);\n\nIf the device raises an interrupt before init_completion() runs,\ncomplete() acquires the uninitialized wait.lock and walks the zeroed\ntask_list in swake_up_locked(). The zeroed task_list makes list_empty()\nreturn false, so swake_up_locked() dereferences a NULL list entry,\ntriggering a KASAN wild-memory-access.\"\n\nFix the chance of a spurious IRQ causing an uninitialized pointer\ndereference by moving init_completion() above devm_request_irq().","publishedAt":"2026-08-06T07:13:54.519Z","updatedAt":"2026-08-17T04:58:25.306Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"aea8ae6c4d3ed58d9223360f758df6bd8b90c608","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"67a49ab41320b3f721ce4be7447754ff040acbd5","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"a50757398794aaa25f908b96c6733e045466cba4","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"f3f90bc7b38ba3ff14f131cea0f8eb77624787a8","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"37077d8271b1f24894fbc21bca1c4cd337525d31","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"bbfebae473ac2c8a194523b29ccb9b45f02f134c","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"eb5b07c9d0ec1a9d4b6871b14793c19967d79dc4","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"3ee2128b6f0eb0be7b6cb8f6e0f1f113a65201a0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iio/adc/spear_adc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.16","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iio/adc/spear_adc.c"]}],"references":["https://git.kernel.org/stable/c/aea8ae6c4d3ed58d9223360f758df6bd8b90c608","https://git.kernel.org/stable/c/67a49ab41320b3f721ce4be7447754ff040acbd5","https://git.kernel.org/stable/c/a50757398794aaa25f908b96c6733e045466cba4","https://git.kernel.org/stable/c/f3f90bc7b38ba3ff14f131cea0f8eb77624787a8","https://git.kernel.org/stable/c/37077d8271b1f24894fbc21bca1c4cd337525d31","https://git.kernel.org/stable/c/bbfebae473ac2c8a194523b29ccb9b45f02f134c","https://git.kernel.org/stable/c/eb5b07c9d0ec1a9d4b6871b14793c19967d79dc4","https://git.kernel.org/stable/c/3ee2128b6f0eb0be7b6cb8f6e0f1f113a65201a0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64602.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64602","state":"PUBLISHED","datePublished":"2026-08-06T07:13:54.519Z","dateUpdated":"2026-08-17T04:58:25.306Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.799Z"},"containers":{"cna":{"title":"iio: adc: spear: Initialize completion before requesting IRQ","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: spear: Initialize completion before requesting IRQ\n\nIn the report from Jaeyoung Chung:\n\n\"spear_adc_probe() in drivers/iio/adc/spear_adc.c registers its\ninterrupt handler with devm_request_irq() before it initializes\nst->completion with init_completion(). If an interrupt arrives after\ndevm_request_irq() and before init_completion(), the handler calls\ncomplete() on an uninitialized completion, causing a kernel panic.\n\nThe probe path, in spear_adc_probe():\n\n    iodev = devm_iio_device_alloc(&pdev->dev, sizeof(*st)); /* st kzalloc-zeroed */\n    ...\n    retval = devm_request_irq(&pdev->dev, irq, spear_adc_isr, 0,\n                              LPC32XXAD_NAME, st);           /* register handler */\n    ...\n    init_completion(&st->completion);                       /* initialize completion */\n\nspear_adc_isr() calls complete():\n\n    complete(&st->completion);\n\nIf the device raises an interrupt before init_completion() runs,\ncomplete() acquires the uninitialized wait.lock and walks the zeroed\ntask_list in swake_up_locked(). The zeroed task_list makes list_empty()\nreturn false, so swake_up_locked() dereferences a NULL list entry,\ntriggering a KASAN wild-memory-access.\"\n\nFix the chance of a spurious IRQ causing an uninitialized pointer\ndereference by moving init_completion() above devm_request_irq()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"aea8ae6c4d3ed58d9223360f758df6bd8b90c608","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"67a49ab41320b3f721ce4be7447754ff040acbd5","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"a50757398794aaa25f908b96c6733e045466cba4","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"f3f90bc7b38ba3ff14f131cea0f8eb77624787a8","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"37077d8271b1f24894fbc21bca1c4cd337525d31","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"bbfebae473ac2c8a194523b29ccb9b45f02f134c","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"eb5b07c9d0ec1a9d4b6871b14793c19967d79dc4","versionType":"git"},{"version":"b586e5d9eee038b8ee6f846cdb6cf2fcbcb2f4ed","status":"affected","lessThan":"3ee2128b6f0eb0be7b6cb8f6e0f1f113a65201a0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iio/adc/spear_adc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.16","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iio/adc/spear_adc.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/aea8ae6c4d3ed58d9223360f758df6bd8b90c608"},{"url":"https://git.kernel.org/stable/c/67a49ab41320b3f721ce4be7447754ff040acbd5"},{"url":"https://git.kernel.org/stable/c/a50757398794aaa25f908b96c6733e045466cba4"},{"url":"https://git.kernel.org/stable/c/f3f90bc7b38ba3ff14f131cea0f8eb77624787a8"},{"url":"https://git.kernel.org/stable/c/37077d8271b1f24894fbc21bca1c4cd337525d31"},{"url":"https://git.kernel.org/stable/c/bbfebae473ac2c8a194523b29ccb9b45f02f134c"},{"url":"https://git.kernel.org/stable/c/eb5b07c9d0ec1a9d4b6871b14793c19967d79dc4"},{"url":"https://git.kernel.org/stable/c/3ee2128b6f0eb0be7b6cb8f6e0f1f113a65201a0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:58:25.306Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}