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THREAT OPS › Threat News › [NVD] CVE-2025-21851 (HIGH 7.8) — In the Linux kernel, the following vulnerability has been resolved: bpf: Fix softlockup in arena_map_free on 64k page kernel On an aarch64 kernel with CONFIG_PAGE_SIZE_64KB=y, arena_htab tests cause a segmentation fault and soft lockup. The same failure is not observed with 4k

[NVD] CVE-2025-21851 (HIGH 7.8) — In the Linux kernel, the following vulnerability has been resolved: bpf: Fix softlockup in arena_map_free on 64k page kernel On an aarch64 kernel with CONFIG_PAGE_SIZE_64KB=y, arena_htab tests cause a segmentation fault and soft lockup. The same failure is not observed with 4k

lownvdPublished 2025-03-12

CVE-2025-21851 CVSS: 7.8 HIGH Published: 2025-03-12T10:15:17.703

In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix softlockup in arena_map_free on 64k page kernel

On an aarch64 kernel with CONFIG_PAGE_SIZE_64KB=y, arena_htab tests cause a segmentation fault and soft lockup. The same failure is not observed with 4k pages on aarch64.

It turns out arena_map_free() is ca

Indicators of compromise

Original source: https://nvd.nist.gov/vuln/detail/CVE-2025-21851