KaraZajac
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CIFSwitch is the newest kernel-7-era LPE not already in the corpus: a
~19-year-old logic flaw in fs/smb/client/cifs_spnego.c where the
cifs.spnego request-key type accepts key descriptions created by
userspace (add_key(2)/request_key(2)) without verifying the request came
from the in-kernel CIFS client. The description's authority-bearing
fields (pid/uid/creduid/upcall_target) are trusted by the root cifs.upcall
helper; with user+mount namespace tricks an unprivileged user coerces
cifs.upcall into loading an attacker NSS module as root. Fixed upstream by
3da1fdf4efbc (merged 7.1-rc5); CWE-20; not in CISA KEV.
Takes the corpus to 42 modules / 37 CVEs.
🟡 honest port — full chain not VM-verified. detect() gates on the kernel
version (Debian backports 5.10.257/6.1.174/6.12.90/7.0.10) AND on the
cifs userspace path (cifs.upcall / cifs.spnego request-key rule), so a
vulnerable kernel without cifs-utils is PRECOND_FAIL not a false positive
(override via SKELETONKEY_CIFS_ASSUME_PRESENT=1/0). exploit() fires only
the non-destructive add_key(2) cifs.spnego probe (no upcall, loads
nothing, revoked immediately) and returns EXPLOIT_FAIL without a euid-0
witness — the namespace+NSS root-pop is not bundled until VM-verified.
--mitigate blocklists the cifs module; --cleanup reverts.
Wired everywhere: registry, Makefile, safety rank (86), 6 detect() test
rows (env-driven precondition override), CVE_METADATA.json + cve_metadata.c
+ KEV_CROSSREF.md (sorted insert, CWE-20/T1068/not-KEV), README + CVES.md
+ website counts (42/37) and a yellow module pill, RELEASE_NOTES v0.9.10,
verify-vm target (sweep pending). Credit: Asim Manizada. Version 0.9.10.
2.8 KiB
2.8 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 37 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-2026-31635 | CWE-130 | dirtydecrypt_cve_2026_31635 |
| CVE-2026-41651 | CWE-367 | pack2theroot_cve_2026_41651 |
| CVE-2026-43494 | ? | pintheft_cve_2026_43494 |
| CVE-2026-46243 | 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 |