CVE-2022-0185
Linux — Linux Kernel Heap-Based Buffer Overflow Vulnerability
Linux · CWE-190 — Integer overflow or wraparound | CWE-191 · in CISA KEV since 2024-08-21
EVRS 75 of 100 Urgent
Patch This Cycle
Rank 859 of 2,960 tracked
Raised to the floor for a confirmed exploited vulnerability.
Why it scores 75
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.252.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
- This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. For more information, please see
- nvd.nist.gov/…/CVE-2022-0185
Fixed in
linux -> 5.15.15-1
Affected versions
- linux kernel
>= 5.1 < 5.4.173>= 5.5 < 5.10.93>= 5.11 < 5.15.16>= 5.16 < 5.16.2 - h410c firmware
- h300s firmware
- h500s firmware
- h700s firmware
- h300e firmware
- h500e firmware
- h700e firmware
+9 more affected products; see the full list at NVD.
Remediation
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 8.4 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.252 (97.9th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2024-09-11 · KEV since 2024 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | None known | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 8.4 (v3.1), assigned by redhat. | Listed | ENISA EUVD |
Description
NVDA heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system.
What CISA says to do