{"id":"CVE-2022-50314","state":"PUBLISHED","title":"nbd: Fix hung when signal interrupts nbd_start_device_ioctl()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: Fix hung when signal interrupts nbd_start_device_ioctl()\n\nsyzbot reported hung task [1].  The following program is a simplified\nversion of the reproducer:\n\nint main(void)\n{\n\tint sv[2], fd;\n\n\tif (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) < 0)\n\t\treturn 1;\n\tif ((fd = open(\"/dev/nbd0\", 0)) < 0)\n\t\treturn 1;\n\tif (ioctl(fd, NBD_SET_SIZE_BLOCKS, 0x81) < 0)\n\t\treturn 1;\n\tif (ioctl(fd, NBD_SET_SOCK, sv[0]) < 0)\n\t\treturn 1;\n\tif (ioctl(fd, NBD_DO_IT) < 0)\n\t\treturn 1;\n\treturn 0;\n}\n\nWhen signal interrupt nbd_start_device_ioctl() waiting the condition\natomic_read(&config->recv_threads) == 0, the task can hung because it\nwaits the completion of the inflight IOs.\n\nThis patch fixes the issue by clearing queue, not just shutdown, when\nsignal interrupt nbd_start_device_ioctl().","publishedAt":"2025-09-15T14:46:09.240Z","updatedAt":"2026-05-11T19:16:55.078Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"3ba3846cb3e2fb3c6fbf79e998472821b298419e","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"3575949513ea3b387b30dac1e69468a923c86caf","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"b2700f98b3f4dd19fb4315b70581e5caff89eb49","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"c0d73be0af8c1310713bc39a8d7a22e35084e14f","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"62006a72b05e0d38727eef5188700f2488be5e89","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"35fb7d4a53d9e36d1b91161ea9870d9c6d57dccf","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"1de7c3cf48fc41cd95adb12bd1ea9033a917798a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/nbd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"4.14.296","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.262","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.220","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.150","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.75","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.19.17","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0.3","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/nbd.c"]}],"references":["https://git.kernel.org/stable/c/3ba3846cb3e2fb3c6fbf79e998472821b298419e","https://git.kernel.org/stable/c/c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398","https://git.kernel.org/stable/c/3575949513ea3b387b30dac1e69468a923c86caf","https://git.kernel.org/stable/c/b2700f98b3f4dd19fb4315b70581e5caff89eb49","https://git.kernel.org/stable/c/c0d73be0af8c1310713bc39a8d7a22e35084e14f","https://git.kernel.org/stable/c/62006a72b05e0d38727eef5188700f2488be5e89","https://git.kernel.org/stable/c/35fb7d4a53d9e36d1b91161ea9870d9c6d57dccf","https://git.kernel.org/stable/c/1de7c3cf48fc41cd95adb12bd1ea9033a917798a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50314.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50314","state":"PUBLISHED","datePublished":"2025-09-15T14:46:09.240Z","dateUpdated":"2026-05-11T19:16:55.078Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-15T14:18:36.813Z"},"containers":{"cna":{"title":"nbd: Fix hung when signal interrupts nbd_start_device_ioctl()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: Fix hung when signal interrupts nbd_start_device_ioctl()\n\nsyzbot reported hung task [1].  The following program is a simplified\nversion of the reproducer:\n\nint main(void)\n{\n\tint sv[2], fd;\n\n\tif (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) < 0)\n\t\treturn 1;\n\tif ((fd = open(\"/dev/nbd0\", 0)) < 0)\n\t\treturn 1;\n\tif (ioctl(fd, NBD_SET_SIZE_BLOCKS, 0x81) < 0)\n\t\treturn 1;\n\tif (ioctl(fd, NBD_SET_SOCK, sv[0]) < 0)\n\t\treturn 1;\n\tif (ioctl(fd, NBD_DO_IT) < 0)\n\t\treturn 1;\n\treturn 0;\n}\n\nWhen signal interrupt nbd_start_device_ioctl() waiting the condition\natomic_read(&config->recv_threads) == 0, the task can hung because it\nwaits the completion of the inflight IOs.\n\nThis patch fixes the issue by clearing queue, not just shutdown, when\nsignal interrupt nbd_start_device_ioctl()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"3ba3846cb3e2fb3c6fbf79e998472821b298419e","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"3575949513ea3b387b30dac1e69468a923c86caf","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"b2700f98b3f4dd19fb4315b70581e5caff89eb49","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"c0d73be0af8c1310713bc39a8d7a22e35084e14f","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"62006a72b05e0d38727eef5188700f2488be5e89","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"35fb7d4a53d9e36d1b91161ea9870d9c6d57dccf","versionType":"git"},{"version":"5ea8d10802ec4c153a6e21eebaf412e2abd29736","status":"affected","lessThan":"1de7c3cf48fc41cd95adb12bd1ea9033a917798a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/nbd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"4.14.296","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.262","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.220","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.150","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.75","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.19.17","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0.3","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/nbd.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3ba3846cb3e2fb3c6fbf79e998472821b298419e"},{"url":"https://git.kernel.org/stable/c/c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398"},{"url":"https://git.kernel.org/stable/c/3575949513ea3b387b30dac1e69468a923c86caf"},{"url":"https://git.kernel.org/stable/c/b2700f98b3f4dd19fb4315b70581e5caff89eb49"},{"url":"https://git.kernel.org/stable/c/c0d73be0af8c1310713bc39a8d7a22e35084e14f"},{"url":"https://git.kernel.org/stable/c/62006a72b05e0d38727eef5188700f2488be5e89"},{"url":"https://git.kernel.org/stable/c/35fb7d4a53d9e36d1b91161ea9870d9c6d57dccf"},{"url":"https://git.kernel.org/stable/c/1de7c3cf48fc41cd95adb12bd1ea9033a917798a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:16:55.078Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.14.296"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.19.262"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.4.220"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.150"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.19.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.0.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}