{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64253","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T15:36:31.773Z","datePublished":"2026-07-24T15:31:21.378Z","dateUpdated":"2026-08-17T04:52:05.134Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T04:52:05.134Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nkernel/fork: clear PF_BLOCK_TS in copy_process()\n\nPF_BLOCK_TS is only set in blk_time_get_ns() when current->plug is\nnon-NULL, and blk_finish_plug() clears it via __blk_flush_plug()\nbefore NULLing the plug pointer.  copy_process() breaks the\ninvariant by inheriting PF_BLOCK_TS from the parent while resetting\nthe child's plug to NULL.\n\nClear PF_BLOCK_TS alongside that assignment so callers can rely on\n\"PF_BLOCK_TS set implies current->plug != NULL\" and dereference\ncurrent->plug unguarded."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/fork.c"],"versions":[{"version":"06b23f92af87a84d70881b2ecaa72e00f7838264","lessThan":"ee0801aceabdf583392477baf69a290b09448b8f","status":"affected","versionType":"git"},{"version":"06b23f92af87a84d70881b2ecaa72e00f7838264","lessThan":"99e6c712cc300883b8cbf03347d5359ec1a4d6dd","status":"affected","versionType":"git"},{"version":"06b23f92af87a84d70881b2ecaa72e00f7838264","lessThan":"77bba61a20f1b3d206f4f90e10a7bb3cd90b9619","status":"affected","versionType":"git"},{"version":"06b23f92af87a84d70881b2ecaa72e00f7838264","lessThan":"fd38b75c4b43295b10d69772a46d1c74dbd6fc81","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/fork.c"],"versions":[{"version":"6.9","status":"affected"},{"version":"0","lessThan":"6.9","status":"unaffected","versionType":"semver"},{"version":"6.12.95","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.38","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.3","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.12.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.18.38"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.1.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ee0801aceabdf583392477baf69a290b09448b8f"},{"url":"https://git.kernel.org/stable/c/99e6c712cc300883b8cbf03347d5359ec1a4d6dd"},{"url":"https://git.kernel.org/stable/c/77bba61a20f1b3d206f4f90e10a7bb3cd90b9619"},{"url":"https://git.kernel.org/stable/c/fd38b75c4b43295b10d69772a46d1c74dbd6fc81"}],"title":"kernel/fork: clear PF_BLOCK_TS in copy_process()","x_generator":{"engine":"bippy-1.2.0"}}}}