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CVE-2025-21680

Description

In the Linux kernel, the following vulnerability has been resolved:pktgen: Avoid out-of-bounds access in get_imix_entriesPassing a sufficient amount of imix entries leads to invalid access to thepkt_dev->imix_entries array because of the incorrect boundary check.UBSAN: array-index-out-of-bounds in net/core/pktgen.c:874:24index 20 is out of range for type 'imix_pkt [20]'CPU: 2 PID: 1210 Comm: bash Not tainted 6.10.0-rc1 #121Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)Call Trace:dump_stack_lvl lib/dump_stack.c:117__ubsan_handle_out_of_bounds lib/ubsan.c:429get_imix_entries net/core/pktgen.c:874pktgen_if_write net/core/pktgen.c:1063pde_write fs/proc/inode.c:334proc_reg_write fs/proc/inode.c:346vfs_write fs/read_write.c:593ksys_write fs/read_write.c:644do_syscall_64 arch/x86/entry/common.c:83entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:130Found by Linux Verification Center (linuxtesting.org) with SVACE.[ fp: allow to fill the array completely; minor changelog cleanup ]

POC

Reference

No PoCs from references.

Github

- https://github.com/fkie-cad/nvd-json-data-feeds

- https://github.com/w4zu/Debian_security