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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-64253

kernel/fork: clear PF_BLOCK_TS in copy_process()

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 06b23f92af87a84d70881b2ecaa72e00f7838264 to < ee0801aceabdf583392477baf69a290b09448b8faffected
  • 06b23f92af87a84d70881b2ecaa72e00f7838264 to < 99e6c712cc300883b8cbf03347d5359ec1a4d6ddaffected
  • 06b23f92af87a84d70881b2ecaa72e00f7838264 to < 77bba61a20f1b3d206f4f90e10a7bb3cd90b9619affected
  • 06b23f92af87a84d70881b2ecaa72e00f7838264 to < fd38b75c4b43295b10d69772a46d1c74dbd6fc81affected

Linux Linux

Default version status: affected

  • 6.9affected
  • 0 to < 6.9unaffected
  • 6.12.95 to ≤ 6.12.*unaffected
  • 6.18.38 to ≤ 6.18.*unaffected
  • 7.1.3 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References