CVE-2026-64253 - kernel/fork: clear PF_BLOCK_TS in copy_process()

CVE-2026-64253 - kernel/fork: clear PF_BLOCK_TS in copy_process()

https://cvefeed.io/rssfeed/latest.atom / Fri, 07/24/2026 - 19:07
CVE ID :CVE-2026-64253
Published : July 24, 2026, 4:16 p.m. | 34 minutes ago
Description :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.
Severity: 0.0 | NA
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