KaraZajac
95589e26cb
release / build (arm64) (push) Waiting to run
release / build (x86_64) (push) Waiting to run
release / build (x86_64-static / musl) (push) Waiting to run
release / build (arm64-static / musl) (push) Waiting to run
release / release (push) Blocked by required conditions
Jaeyoung Chung's kernelCTF "Bad Epoll": a race-condition use-after-free in fs/eventpoll.c. ep_remove() clears file->f_ep under f_lock but keeps using the file (hlist_del_rcu + unlock) while a concurrent __fput() frees the still-referenced struct eventpoll. Reachable by any unprivileged user with no userns / CONFIG / capability; weaponised via cross-cache to a struct file, /proc/self/fdinfo arb-read, and ROP. Introduced 58c9b016e128 (6.4), fixed a6dc643c6931 (7.1-rc1), stable backport 7.0.13. CWE-416; not in KEV. The corpus's first epoll / VFS-teardown module. Shipped as a reconstructed, deliberately under-driven trigger on the stackrot / nft_catchall contract: detect() is a pure version gate (>= 6.4 and below the on-branch fix; no userns precondition -- epoll needs none); exploit() forks a CPU-pinned child that exercises the ep_remove-vs-__fput close window a hard-bounded 48 attempts / 2s and returns EXPLOIT_FAIL. It does not grind the race to a win, does not do the cross-cache reclaim, and does not bundle the fdinfo R/W + ROP (a won race frees a live struct file and rarely trips KASAN -> silent-corruption risk). Wired: registry, Makefile, safety rank (12 -- lowest in the corpus; a kernel race is the least predictable class), 5 detect() test rows (version gating), CVE metadata (sorted insert, CWE-416 / T1068 / not-KEV), README + CVES.md + website counts (44/39), RELEASE_NOTES v0.9.12, and a verify-vm target (sweep pending). Detection rules are intentionally weak/structural (epoll ubiquitous, rarely KASAN) -- post-exploitation euid-0 transition, no yara. Also corrects pre-existing README drift in the "not yet verified" count (8 -> 11). Not VM-verified, so the verified count stays 28 of 39. Version 0.9.12. Credit: Jaeyoung Chung (J-jaeyoung). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KUq4DGXSPBmPkAyJ9WnM9n
3.0 KiB
3.0 KiB
CISA KEV Cross-Reference
Which SKELETONKEY modules cover CVEs that CISA has observed exploited
in the wild per the Known Exploited Vulnerabilities catalog.
Refreshed via tools/refresh-cve-metadata.py.
13 of 39 modules cover KEV-listed CVEs.
In KEV (prioritize patching)
| CVE | Date added to KEV | CWE | Module |
|---|---|---|---|
| CVE-2019-13272 | 2021-12-10 | ? | ptrace_traceme_cve_2019_13272 |
| CVE-2016-5195 | 2022-03-03 | CWE-362 | dirty_cow_cve_2016_5195 |
| CVE-2021-3156 | 2022-04-06 | CWE-193 | sudo_samedit_cve_2021_3156 |
| CVE-2022-0847 | 2022-04-25 | CWE-665 | dirty_pipe_cve_2022_0847 |
| CVE-2021-4034 | 2022-06-27 | CWE-787 | pwnkit_cve_2021_4034 |
| CVE-2021-3493 | 2022-10-20 | CWE-270 | overlayfs_cve_2021_3493 |
| CVE-2024-1086 | 2024-05-30 | CWE-416 | nf_tables_cve_2024_1086 |
| CVE-2022-0185 | 2024-08-21 | CWE-190 | fuse_legacy_cve_2022_0185 |
| CVE-2023-0386 | 2025-06-17 | CWE-282 | overlayfs_setuid_cve_2023_0386 |
| CVE-2025-32463 | 2025-09-29 | CWE-829 | sudo_chwoot_cve_2025_32463 |
| CVE-2021-22555 | 2025-10-06 | CWE-787 | netfilter_xtcompat_cve_2021_22555 |
| CVE-2018-14634 | 2026-01-26 | CWE-190 | mutagen_astronomy_cve_2018_14634 |
| CVE-2022-0492 | 2026-06-02 | CWE-287 | cgroup_release_agent_cve_2022_0492 |
Not in KEV
Not observed exploited per CISA — but several have public PoC code and are technically reachable. "Not in KEV" is not the same as "safe to ignore".
| CVE | CWE | Module |
|---|---|---|
| CVE-2017-7308 | CWE-681 | af_packet_cve_2017_7308 |
| CVE-2019-14287 | CWE-755 | sudo_runas_neg1_cve_2019_14287 |
| CVE-2020-14386 | CWE-250 | af_packet2_cve_2020_14386 |
| CVE-2020-29661 | CWE-416 | tioscpgrp_cve_2020_29661 |
| CVE-2021-33909 | CWE-190 | sequoia_cve_2021_33909 |
| CVE-2022-25636 | CWE-269 | nft_fwd_dup_cve_2022_25636 |
| CVE-2022-2588 | CWE-416 | cls_route4_cve_2022_2588 |
| CVE-2023-0179 | CWE-190 | nft_payload_cve_2023_0179 |
| CVE-2023-0458 | CWE-476 | entrybleed_cve_2023_0458 |
| CVE-2023-2008 | CWE-129 | vmwgfx_cve_2023_2008 |
| CVE-2023-22809 | CWE-269 | sudoedit_editor_cve_2023_22809 |
| CVE-2023-32233 | CWE-416 | nft_set_uaf_cve_2023_32233 |
| CVE-2023-3269 | CWE-416 | stackrot_cve_2023_3269 |
| CVE-2023-4622 | CWE-416 | af_unix_gc_cve_2023_4622 |
| CVE-2024-26581 | ? | nft_pipapo_cve_2024_26581 |
| CVE-2024-50264 | CWE-416 | vsock_uaf_cve_2024_50264 |
| CVE-2025-32462 | CWE-863 | sudo_host_cve_2025_32462 |
| CVE-2025-6019 | CWE-250 | udisks_libblockdev_cve_2025_6019 |
| CVE-2026-23111 | CWE-416 | nft_catchall_cve_2026_23111 |
| CVE-2026-31635 | CWE-130 | dirtydecrypt_cve_2026_31635 |
| CVE-2026-41651 | CWE-367 | pack2theroot_cve_2026_41651 |
| CVE-2026-43494 | ? | pintheft_cve_2026_43494 |
| CVE-2026-46242 | CWE-416 | bad_epoll_cve_2026_46242 |
| CVE-2026-46243 | CWE-20 | cifswitch_cve_2026_46243 |
| CVE-2026-46300 | CWE-787 | fragnesia_cve_2026_46300 |
| CVE-2026-46333 | CWE-269 | ptrace_pidfd_cve_2026_46333 |