CVE-2026-64253
kernel/fork: clear PF_BLOCK_TS in copy_process()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: kernel/fork: clear PF_BLOCK_TS in copy_process() PF_BLOCK_TS is only set in blk_time_get_ns() when current->plug is non-NULL, and blk_finish_plug() clears it via __blk_flush_plug() before NULLing the plug pointer. copy_process() breaks the invariant by inheriting PF_BLOCK_TS from the parent while resetting the child's plug to NULL. Clear PF_BLOCK_TS alongside that assignment so callers can rely on "PF_BLOCK_TS set implies current->plug != NULL" and dereference current->plug unguarded.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 24, 2026 |
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Affected Versions
Linux / Linux
06b23f92af87a84d70881b2ecaa72e00f7838264 < ee0801aceabdf583392477baf69a290b09448b8f 06b23f92af87a84d70881b2ecaa72e00f7838264 < 99e6c712cc300883b8cbf03347d5359ec1a4d6dd 06b23f92af87a84d70881b2ecaa72e00f7838264 < 77bba61a20f1b3d206f4f90e10a7bb3cd90b9619 06b23f92af87a84d70881b2ecaa72e00f7838264 < fd38b75c4b43295b10d69772a46d1c74dbd6fc81
Linux / Linux
6.9
References
git.kernel.org: https://git.kernel.org/stable/c/ee0801aceabdf583392477baf69a290b09448b8f git.kernel.org: https://git.kernel.org/stable/c/99e6c712cc300883b8cbf03347d5359ec1a4d6dd git.kernel.org: https://git.kernel.org/stable/c/77bba61a20f1b3d206f4f90e10a7bb3cd90b9619 git.kernel.org: https://git.kernel.org/stable/c/fd38b75c4b43295b10d69772a46d1c74dbd6fc81