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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.
59 lines
2.8 KiB
Markdown
59 lines
2.8 KiB
Markdown
# CISA KEV Cross-Reference
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Which SKELETONKEY modules cover CVEs that CISA has observed exploited
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in the wild per the Known Exploited Vulnerabilities catalog.
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Refreshed via `tools/refresh-cve-metadata.py`.
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**13 of 37 modules cover KEV-listed CVEs.**
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## In KEV (prioritize patching)
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| CVE | Date added to KEV | CWE | Module |
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| --- | --- | --- | --- |
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| CVE-2019-13272 | 2021-12-10 | ? | `ptrace_traceme_cve_2019_13272` |
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| CVE-2016-5195 | 2022-03-03 | CWE-362 | `dirty_cow_cve_2016_5195` |
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| CVE-2021-3156 | 2022-04-06 | CWE-193 | `sudo_samedit_cve_2021_3156` |
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| CVE-2022-0847 | 2022-04-25 | CWE-665 | `dirty_pipe_cve_2022_0847` |
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| CVE-2021-4034 | 2022-06-27 | CWE-787 | `pwnkit_cve_2021_4034` |
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| CVE-2021-3493 | 2022-10-20 | CWE-270 | `overlayfs_cve_2021_3493` |
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| CVE-2024-1086 | 2024-05-30 | CWE-416 | `nf_tables_cve_2024_1086` |
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| CVE-2022-0185 | 2024-08-21 | CWE-190 | `fuse_legacy_cve_2022_0185` |
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| CVE-2023-0386 | 2025-06-17 | CWE-282 | `overlayfs_setuid_cve_2023_0386` |
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| CVE-2025-32463 | 2025-09-29 | CWE-829 | `sudo_chwoot_cve_2025_32463` |
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| CVE-2021-22555 | 2025-10-06 | CWE-787 | `netfilter_xtcompat_cve_2021_22555` |
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| CVE-2018-14634 | 2026-01-26 | CWE-190 | `mutagen_astronomy_cve_2018_14634` |
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| CVE-2022-0492 | 2026-06-02 | CWE-287 | `cgroup_release_agent_cve_2022_0492` |
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## Not in KEV
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Not observed exploited per CISA — but several have public PoC code
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and are technically reachable. "Not in KEV" is not the same as
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"safe to ignore".
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| CVE | CWE | Module |
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| --- | --- | --- |
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| CVE-2017-7308 | CWE-681 | `af_packet_cve_2017_7308` |
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| CVE-2019-14287 | CWE-755 | `sudo_runas_neg1_cve_2019_14287` |
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| CVE-2020-14386 | CWE-250 | `af_packet2_cve_2020_14386` |
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| CVE-2020-29661 | CWE-416 | `tioscpgrp_cve_2020_29661` |
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| CVE-2021-33909 | CWE-190 | `sequoia_cve_2021_33909` |
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| CVE-2022-25636 | CWE-269 | `nft_fwd_dup_cve_2022_25636` |
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| CVE-2022-2588 | CWE-416 | `cls_route4_cve_2022_2588` |
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| CVE-2023-0179 | CWE-190 | `nft_payload_cve_2023_0179` |
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| CVE-2023-0458 | CWE-476 | `entrybleed_cve_2023_0458` |
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| CVE-2023-2008 | CWE-129 | `vmwgfx_cve_2023_2008` |
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| CVE-2023-22809 | CWE-269 | `sudoedit_editor_cve_2023_22809` |
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| CVE-2023-32233 | CWE-416 | `nft_set_uaf_cve_2023_32233` |
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| CVE-2023-3269 | CWE-416 | `stackrot_cve_2023_3269` |
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| CVE-2023-4622 | CWE-416 | `af_unix_gc_cve_2023_4622` |
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| CVE-2024-26581 | ? | `nft_pipapo_cve_2024_26581` |
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| CVE-2024-50264 | CWE-416 | `vsock_uaf_cve_2024_50264` |
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| CVE-2025-32462 | CWE-863 | `sudo_host_cve_2025_32462` |
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| CVE-2025-6019 | CWE-250 | `udisks_libblockdev_cve_2025_6019` |
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| CVE-2026-31635 | CWE-130 | `dirtydecrypt_cve_2026_31635` |
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| CVE-2026-41651 | CWE-367 | `pack2theroot_cve_2026_41651` |
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| CVE-2026-43494 | ? | `pintheft_cve_2026_43494` |
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| CVE-2026-46243 | CWE-20 | `cifswitch_cve_2026_46243` |
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| CVE-2026-46300 | CWE-787 | `fragnesia_cve_2026_46300` |
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| CVE-2026-46333 | CWE-269 | `ptrace_pidfd_cve_2026_46333` |
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