{"id":"CVE-2026-64182","state":"PUBLISHED","title":"drivers/base/memory: fix memory block reference leak in poison accounting","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers/base/memory: fix memory block reference leak in poison accounting\n\nmemblk_nr_poison_inc() and memblk_nr_poison_sub() look up a memory block\nvia find_memory_block_by_id(), which acquires a reference to the memory\nblock device.\n\nBoth helpers use the returned memory block without dropping that\nreference, leaking the device reference on each successful lookup.  Drop\nthe reference after updating nr_hwpoison.","publishedAt":"2026-07-19T15:41:05.186Z","updatedAt":"2026-07-19T15:41:05.186Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"686b4283f82cd630fafd7ca9b03dfc080b3ec8fa","versionType":"git"},{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"ce60d9452a0f2effa72fd20ea270c59ca691d455","versionType":"git"},{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"24840b3139d7415144b81e4f9f4c44670d15bed9","versionType":"git"},{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"8502e2c2d0633f99d94d22ae8dabc10caae1fc2a","versionType":"git"},{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"03a2cc1756a0570f887d624cd6c535ea0cbd4951","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/memory.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.142","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.92","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.34","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/memory.c"]}],"references":["https://git.kernel.org/stable/c/686b4283f82cd630fafd7ca9b03dfc080b3ec8fa","https://git.kernel.org/stable/c/ce60d9452a0f2effa72fd20ea270c59ca691d455","https://git.kernel.org/stable/c/24840b3139d7415144b81e4f9f4c44670d15bed9","https://git.kernel.org/stable/c/8502e2c2d0633f99d94d22ae8dabc10caae1fc2a","https://git.kernel.org/stable/c/03a2cc1756a0570f887d624cd6c535ea0cbd4951"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64182.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64182","state":"PUBLISHED","datePublished":"2026-07-19T15:41:05.186Z","dateUpdated":"2026-07-19T15:41:05.186Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T07:54:57.039Z"},"containers":{"cna":{"title":"drivers/base/memory: fix memory block reference leak in poison accounting","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers/base/memory: fix memory block reference leak in poison accounting\n\nmemblk_nr_poison_inc() and memblk_nr_poison_sub() look up a memory block\nvia find_memory_block_by_id(), which acquires a reference to the memory\nblock device.\n\nBoth helpers use the returned memory block without dropping that\nreference, leaking the device reference on each successful lookup.  Drop\nthe reference after updating nr_hwpoison."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"686b4283f82cd630fafd7ca9b03dfc080b3ec8fa","versionType":"git"},{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"ce60d9452a0f2effa72fd20ea270c59ca691d455","versionType":"git"},{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"24840b3139d7415144b81e4f9f4c44670d15bed9","versionType":"git"},{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"8502e2c2d0633f99d94d22ae8dabc10caae1fc2a","versionType":"git"},{"version":"5033091de814ab4b5623faed2755f3064e19e2d2","status":"affected","lessThan":"03a2cc1756a0570f887d624cd6c535ea0cbd4951","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/memory.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.142","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.92","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.34","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/memory.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/686b4283f82cd630fafd7ca9b03dfc080b3ec8fa"},{"url":"https://git.kernel.org/stable/c/ce60d9452a0f2effa72fd20ea270c59ca691d455"},{"url":"https://git.kernel.org/stable/c/24840b3139d7415144b81e4f9f4c44670d15bed9"},{"url":"https://git.kernel.org/stable/c/8502e2c2d0633f99d94d22ae8dabc10caae1fc2a"},{"url":"https://git.kernel.org/stable/c/03a2cc1756a0570f887d624cd6c535ea0cbd4951"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-07-19T15:41:05.186Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}