{"id":"CVE-2026-98476","state":"PUBLISHED","title":"s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()\n\nThe channel path registry entry associated with a CHPID may be removed\nwhile the subchannel's PMCW still references that CHPID. In this case,\nchpid_to_chp() can return NULL, leading to a NULL pointer dereference.\n\nAdd the missing NULL check before dereferencing the returned pointer.","publishedAt":"2026-10-18T15:15:45.100Z","updatedAt":"2026-10-19T09:20:13.920Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"9d8b21820caed9128945fffcedf03e2a4c21eee2","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"5fc54e04dad90b15d0430118b3f288a1d64e66c9","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"27e396a89f76f742abdbe9f8c4a58a6e806fdf59","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"dbf30e661ceb9a52c94c85719716391dcc29142a","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"5e006ac90a4d331db1dd712b91fec849b45ffc01","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"c3bbcb32deecc06ebb1762398399b566d5ff2fc9","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"44b16b02608058fc72198ac0205969f0f43065df","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"5b76268dac968612f7283d59b539036de955b7d9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/s390/cio/device_ops.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","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/s390/cio/device_ops.c"]}],"references":["https://git.kernel.org/stable/c/9d8b21820caed9128945fffcedf03e2a4c21eee2","https://git.kernel.org/stable/c/5fc54e04dad90b15d0430118b3f288a1d64e66c9","https://git.kernel.org/stable/c/27e396a89f76f742abdbe9f8c4a58a6e806fdf59","https://git.kernel.org/stable/c/dbf30e661ceb9a52c94c85719716391dcc29142a","https://git.kernel.org/stable/c/5e006ac90a4d331db1dd712b91fec849b45ffc01","https://git.kernel.org/stable/c/c3bbcb32deecc06ebb1762398399b566d5ff2fc9","https://git.kernel.org/stable/c/44b16b02608058fc72198ac0205969f0f43065df","https://git.kernel.org/stable/c/5b76268dac968612f7283d59b539036de955b7d9"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98476.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98476","state":"PUBLISHED","datePublished":"2026-10-18T15:15:45.100Z","dateUpdated":"2026-10-19T09:20:13.920Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.351Z"},"containers":{"cna":{"title":"s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()\n\nThe channel path registry entry associated with a CHPID may be removed\nwhile the subchannel's PMCW still references that CHPID. In this case,\nchpid_to_chp() can return NULL, leading to a NULL pointer dereference.\n\nAdd the missing NULL check before dereferencing the returned pointer."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"9d8b21820caed9128945fffcedf03e2a4c21eee2","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"5fc54e04dad90b15d0430118b3f288a1d64e66c9","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"27e396a89f76f742abdbe9f8c4a58a6e806fdf59","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"dbf30e661ceb9a52c94c85719716391dcc29142a","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"5e006ac90a4d331db1dd712b91fec849b45ffc01","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"c3bbcb32deecc06ebb1762398399b566d5ff2fc9","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"44b16b02608058fc72198ac0205969f0f43065df","versionType":"git"},{"version":"199652309a4d6635fca19d7528d73ab9e219bd9a","status":"affected","lessThan":"5b76268dac968612f7283d59b539036de955b7d9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/s390/cio/device_ops.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","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/s390/cio/device_ops.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9d8b21820caed9128945fffcedf03e2a4c21eee2"},{"url":"https://git.kernel.org/stable/c/5fc54e04dad90b15d0430118b3f288a1d64e66c9"},{"url":"https://git.kernel.org/stable/c/27e396a89f76f742abdbe9f8c4a58a6e806fdf59"},{"url":"https://git.kernel.org/stable/c/dbf30e661ceb9a52c94c85719716391dcc29142a"},{"url":"https://git.kernel.org/stable/c/5e006ac90a4d331db1dd712b91fec849b45ffc01"},{"url":"https://git.kernel.org/stable/c/c3bbcb32deecc06ebb1762398399b566d5ff2fc9"},{"url":"https://git.kernel.org/stable/c/44b16b02608058fc72198ac0205969f0f43065df"},{"url":"https://git.kernel.org/stable/c/5b76268dac968612f7283d59b539036de955b7d9"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:20:13.920Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}