CISA KEV · catalog date Aug 21, 2024 · first observed Jul 19, 2026
Evidence dossier
CVE-2022-0185
A 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…
Exploited in the wild (CISA KEV since Aug 21, 2024). NVD reports CVSS 3.1 8.4. EPSS estimates 25.2% exploit likelihood as of Aug 27, 2026.
As of Aug 27, 2026
Normalized restatement
A 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.
- State
- PUBLISHED
- Published
- Feb 11, 2022
- Updated
- Oct 21, 2025
- Evidence coverage
- 97%
Evidence chronology
What was known when
- Source dateSource date omittedFirst observed by CASCACISA-ADPOriginal evidence ↗
Record text: CISA ADP Vulnrichment
Inspect raw assertion
- Field
container- Value
- CISA ADP Vulnrichment
- Source dateSource date omittedFirst observed by CASCACVE ProgramOriginal evidence ↗
Record text: CVE Program Container
Inspect raw assertion
- Field
container- Value
- CVE Program Container
- Source dateSource date omittedFirst observed by CASCAredhatOriginal evidence ↗
Record text: A 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.
Inspect raw assertion
- Field
container- Value
- A 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.
- Source dateFirst observed by CASCACISA KEVOriginal evidence ↗
Exploitation cataloged: Linux Kernel Heap-Based Buffer Overflow Vulnerability
Inspect raw assertion
- Field
observed_exploitation- Value
- Linux Kernel Heap-Based Buffer Overflow Vulnerability
- Source dateFirst observed by CASCAFIRST EPSSOriginal evidence ↗
EPSS score: 25.15% probability · 97.77th percentile
Inspect raw assertion
- Field
model_probability- Value
- Probability 0.251510000000; percentile 0.977700000000
FIRST EPSS · score date Aug 27, 2026 · 97.8th percentile · first observed Aug 27, 2026
NVD · CVSS 3.1 · first observed Jul 19, 2026 · same-version scores align in this snapshot
Evidence detail
Source limits and decisions
Why each evidence state has this value
casca-unknown-reasons-v1Eligible evidence is present for this bounded claim.
- Revision
- evidence-policy-v1.1.0
- Cutoff
- Aug 27, 2026
- Resolution
- None
Eligible evidence is present for this bounded claim.
- Revision
- evidence-policy-v1.1.0
- Cutoff
- Aug 27, 2026
- Resolution
- None
Eligible evidence is present for this bounded claim.
- Revision
- casca-direct-cvss-eligibility-v1
- Cutoff
- Aug 27, 2026
- Resolution
- None
The cited source assertion is retained while canonical product linkage remains open.
- Revision
- casca-factor-d-obligations-v1
- Cutoff
- Aug 27, 2026
- Resolution
- Resolve identity
Source comparison
Who said what
CISA ADP Vulnrichment
Inspect raw assertion
- Field
container- Value
- CISA ADP Vulnrichment
CVE Program Container
Inspect raw assertion
- Field
container- Value
- CVE Program Container
A 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.
Inspect raw assertion
- Field
container- Value
- A 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.
Linux Kernel Heap-Based Buffer Overflow Vulnerability
Inspect raw assertion
- Field
observed_exploitation- Value
- Linux Kernel Heap-Based Buffer Overflow Vulnerability
25.15% probability · 97.77th percentile
Inspect raw assertion
- Field
model_probability- Value
- Probability 0.251510000000; percentile 0.977700000000
Applicability
Cited product scope
Grouped from 17 configuration nodes in this exact snapshot. Visual grouping is navigational; asset exposure and root cause require cited evidence.
Identity source boundaries
- Cpe dictionary1,775,266 records · observed through 2026-07-21T06:45:29.809Z
27d65b0f-b718-4b4f-bb79-c47c68d09dfa - Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z
955dae73-7302-438b-aee1-058d7cc5d48e
19 scope groups
Canonical linkage remains open; the cited source assertion is retained below.
Inspect raw assertion
[{"status": "affected", "version": "8.4"}]Canonical linkage remains open; the cited source assertion is retained below.
Inspect raw assertion
[{"status": "affected", "version": "8.4"}]product-0eda7a801761be4590f267cf319481c8c0aaa30546d99cc064edf77989ce05c9Linked exactInspect raw assertions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 0 · node/0 · match 0
- Logic
- OR
- Version bounds
- from including 5.1; through excluding 5.4.173
- Match ID
c917c0ef-35f9-40f6-9b52-8d5c0e6e8939
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 0 · node/0 · match 2
- Logic
- OR
- Version bounds
- from including 5.11; through excluding 5.15.16
- Match ID
d40912aa-95d4-4d87-8235-87e2093796bf
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 0 · node/0 · match 3
- Logic
- OR
- Version bounds
- from including 5.16; through excluding 5.16.2
- Match ID
54c861c1-737c-4528-9c22-48eae0b40a4e
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 0 · node/0 · match 1
- Logic
- OR
- Version bounds
- from including 5.5; through excluding 5.10.93
- Match ID
4f9e520a-576b-43e0-8238-3e6f2939361f
product-5e8aff139fa83ae85f478f3473c05dbdb594f6f806121b02c3f419f2a2da62d5Linked exactInspect raw assertion
cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 5 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
7afc73ce-abb9-42d3-9a71-3f5bc5381e0e
product-fc149af9032ace9a010e9f89149c81bc45faeba303217af053928b26be955f3dLinked exactInspect raw assertion
cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 5 · node/0 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
108a2215-50fb-4074-94cf-c130fa14566d
product-5b787f6fb0dbffca7d5383cfa87cd93654a14ed60ccdd59abc2ba697fe7ead69Linked exactInspect raw assertion
cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
9f9c8c20-42eb-4ab5-bd97-212deb070c43
product-b9e7a301eef0306dd174904e39d76a7c24000b372471d8c7805d9a00b6a6e419Linked exactInspect raw assertion
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 2 · node/0 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
6770b6c3-732e-4e22-bf1c-2d2fd610061c
product-19a4460172d592ee30b338581dced13baf393eedf54989f7303c0971a7aa6832Linked exactInspect raw assertion
cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
cddf61b7-ec5c-467c-b710-b89f502cd04f
product-3d0915e39b5cbd4a35c4f9144f57e38484db6d2fffb6f1d595f5fd6eb6a7045aLinked exactInspect raw assertion
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 1 · node/0 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
234defe0-5ce5-4b0a-96b8-5d227cb8ed31
product-ae7668c0a5adbc5d6599144484fb84400193fe6c73d0e6bb570cd2a233e63b35Linked exactInspect raw assertion
cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 8 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
8497a4c9-8474-4a62-8331-3fe862ed4098
product-c29ed97377ecd5a1bb977b857e33722917ef8494748bf83825ca6748f85481aeLinked exactInspect raw assertion
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 8 · node/0 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
d0b4ad8a-f172-4558-aec6-ff424ba2d912
product-e1a5a15eac66519d4e1187be3639955761cab5eb471d3f739edd906febb8b689Linked exactInspect raw assertion
cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 6 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
803bc414-b250-4e3a-a478-a3881340d6b8
product-f6f14489b90770f5fcf332bfe05780026ac83b5a028570dad28517167b27d8b7Linked exactInspect raw assertion
cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 6 · node/0 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
32f0b6c0-f930-480d-962b-3f4efdcc13c7
product-4c7f1f62606e18f71887f5954346c3f8c8376e418a089dca8282922aa180aff3Linked exactInspect raw assertion
cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
e63d8b0f-006e-4801-bf9d-1c001bbfb4f9
product-f13a7dff7633e8a34e5465fdbeace2aa7562b47a38b49f4f05dc5e2406bc9c6aLinked exactInspect raw assertion
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 3 · node/0 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
7fff7106-ed78-49ba-9ec5-b889e3685d53
product-0b15bdf94d171d9ff04dd6ff3be42b5de90d27fbebaa46da1a0a64b95b2b58c1Linked exactInspect raw assertion
cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 7 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
736aeae9-782b-4f71-9893-ded53367e102
product-a9b8857994572d5d62ec3361bb9cf6d6b9ed2a9b747716f6a517489acf47bb51Linked exactInspect raw assertion
cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 7 · node/0 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
0feb3337-bfde-462a-908b-176f92053cec
product-fcd38a3bd0a96c349925cecfd0d22ecf9836f21d88da8f545d6938975aa84275Linked exactInspect raw assertion
cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 4 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
b06f4839-d16a-4a61-9bb5-55b13f41e47f
product-3953d9e2b43fe76a6f94d197de1c80572cc133eca41cf7c6f838a4d8f875fb6dLinked exactInspect raw assertion
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 4 · node/0 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
56409cec-5a1e-4450-aa42-641e459cc2af
Affected-product evidence
Accepted scope and product mapping
9 canonical links · 1 source-reported links
vendor-9c702362a97e8770255c53f324861f65f3209d35ce95f01842c69a458450f6fa · product-0eda7a801761be4590f267cf319481c8c0aaa30546d99cc064edf77989ce05c9
- Source class
- Nvd cpe vulnerable target
- Assertions
- 4
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
088ec114-4e50-4af4-b833-f92766e0c9048d9818b7-a6c8-4481-bf63-63f5588663eaba208d1e-5de0-4908-9534-52a0577470bbf36da64c-14e1-4f49-a6b9-c2fbef819cc9vendor-d1dcf2e2192106a1eb34744930a80b83005fa5d60195c923256e69ac39974aed · product-3953d9e2b43fe76a6f94d197de1c80572cc133eca41cf7c6f838a4d8f875fb6d
- Source class
- Nvd cpe vulnerable target
- Assertions
- 1
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
640bba28-6ab4-46dd-892a-4f734bce7625vendor-d1dcf2e2192106a1eb34744930a80b83005fa5d60195c923256e69ac39974aed · product-3d0915e39b5cbd4a35c4f9144f57e38484db6d2fffb6f1d595f5fd6eb6a7045a
- Source class
- Nvd cpe vulnerable target
- Assertions
- 1
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
d01e3664-fd63-4702-9b0a-0866a7317de8vendor-d1dcf2e2192106a1eb34744930a80b83005fa5d60195c923256e69ac39974aed · product-a9b8857994572d5d62ec3361bb9cf6d6b9ed2a9b747716f6a517489acf47bb51
- Source class
- Nvd cpe vulnerable target
- Assertions
- 1
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
c2a5500b-630b-408e-b3b9-ba8250fdfc59vendor-d1dcf2e2192106a1eb34744930a80b83005fa5d60195c923256e69ac39974aed · product-b9e7a301eef0306dd174904e39d76a7c24000b372471d8c7805d9a00b6a6e419
- Source class
- Nvd cpe vulnerable target
- Assertions
- 1
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
e9bc0ede-f7e8-4d07-89ca-8aa4a26b9cc9vendor-d1dcf2e2192106a1eb34744930a80b83005fa5d60195c923256e69ac39974aed · product-c29ed97377ecd5a1bb977b857e33722917ef8494748bf83825ca6748f85481ae
- Source class
- Nvd cpe vulnerable target
- Assertions
- 1
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
d9c48b72-6352-4429-a278-e019767c59f7vendor-d1dcf2e2192106a1eb34744930a80b83005fa5d60195c923256e69ac39974aed · product-f13a7dff7633e8a34e5465fdbeace2aa7562b47a38b49f4f05dc5e2406bc9c6a
- Source class
- Nvd cpe vulnerable target
- Assertions
- 1
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
a62773dd-52d6-46ed-80bc-d8da9884d2b9vendor-d1dcf2e2192106a1eb34744930a80b83005fa5d60195c923256e69ac39974aed · product-f6f14489b90770f5fcf332bfe05780026ac83b5a028570dad28517167b27d8b7
- Source class
- Nvd cpe vulnerable target
- Assertions
- 1
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
8f056a0c-975b-4fc2-adea-775f000c7aa8vendor-d1dcf2e2192106a1eb34744930a80b83005fa5d60195c923256e69ac39974aed · product-fc149af9032ace9a010e9f89149c81bc45faeba303217af053928b26be955f3d
- Source class
- Nvd cpe vulnerable target
- Assertions
- 1
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
42e4c3be-a1f1-482b-a3d6-b0f75013e824Canonical linkage remains open; the cited source assertion is retained below.
Vendor specified only by source · Product specified only by source
- Source class
- Direct cve affected
- Assertions
- 2
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
f0b141f1-0225-49d1-ad0d-beb047f8ddd7fe55cf1a-b96b-49b0-9a00-0ddc96ddc3efAssessments
CVSS by origin
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAV:L/AC:L/Au:N/C:C/I:C/A:CCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HDirect CVE/CNA normalized decisions
CISA-ADP
CVSS 3.1 · Secondary · Independent enrichment · rank 2
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Validation
- Valid match
- Recomputed
- 8.4
- Decision reason
- Evidence supported
- Policy
- casca-direct-cvss-eligibility-v1
Assessments are retained side by side under closed precedence. Cascade never averages CVSS.
Evidence boundaries
- KEV membership is authoritative for the catalog, not proof of exposure in any environment.
- EPSS is a dated model probability and not an individual-environment prediction.
- Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
- NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
- Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
- NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
- Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
- OSV aggregation and OSV-converted NVD material are not independent corroboration.
- Red Hat facts are vendor assertions for the exact supplied products.
- Nonmembership and not-yet-observed states are not proof of safety.