CVEvulnerability

CVE-2026-64253

5.5 MEDIUM Published 2026-07-24 Modified 2026-08-17 Official page ↗
Status
Analyzed
Published
2026-07-24
Last modified
2026-08-17
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-476

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 configurations

• linux linux kernel (>= 6.9 < 6.12.95) • linux linux kernel (>= 6.13 < 6.18.38) • linux linux kernel (>= 6.19 < 7.1.3)

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References