CVE-2022-26356
Vulnerability from cvelistv5
Published
2022-04-05 00:00
Modified
2024-08-03 05:03
Severity ?
EPSS score ?
Summary
Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.
References
{ containers: { adp: [ { providerMetadata: { dateUpdated: "2024-08-03T05:03:32.753Z", orgId: "af854a3a-2127-422b-91ae-364da2661108", shortName: "CVE", }, references: [ { tags: [ "x_transferred", ], url: "https://xenbits.xenproject.org/xsa/advisory-397.txt", }, { tags: [ "x_transferred", ], url: "http://xenbits.xen.org/xsa/advisory-397.html", }, { name: "[oss-security] 20220405 Xen Security Advisory 397 v2 (CVE-2022-26356) - Racy interactions between dirty vram tracking and paging log dirty hypercalls", tags: [ "mailing-list", "x_transferred", ], url: "http://www.openwall.com/lists/oss-security/2022/04/05/1", }, { name: "DSA-5117", tags: [ "vendor-advisory", "x_transferred", ], url: "https://www.debian.org/security/2022/dsa-5117", }, { name: "FEDORA-2022-dfbf7e2372", tags: [ "vendor-advisory", "x_transferred", ], url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/", }, { name: "FEDORA-2022-64b2c02d29", tags: [ "vendor-advisory", "x_transferred", ], url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/", }, { name: "GLSA-202402-07", tags: [ "vendor-advisory", "x_transferred", ], url: "https://security.gentoo.org/glsa/202402-07", }, ], title: "CVE Program Container", }, ], cna: { affected: [ { product: "xen", vendor: "Xen", versions: [ { status: "unknown", version: "consult Xen advisory XSA-397", }, ], }, ], credits: [ { lang: "en", value: "{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Roger Pau Monné of Citrix.'}]}}}", }, ], descriptions: [ { lang: "en", value: "Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.", }, ], metrics: [ { other: { content: { description: { description_data: [ { lang: "eng", value: "An attacker can cause Xen to leak memory, eventually leading to a Denial of\nService (DoS) affecting the entire host.", }, ], }, }, type: "unknown", }, }, ], problemTypes: [ { descriptions: [ { description: "unknown", lang: "en", type: "text", }, ], }, ], providerMetadata: { dateUpdated: "2024-02-04T08:06:38.987009", orgId: "23aa2041-22e1-471f-9209-9b7396fa234f", shortName: "XEN", }, references: [ { url: "https://xenbits.xenproject.org/xsa/advisory-397.txt", }, { url: "http://xenbits.xen.org/xsa/advisory-397.html", }, { name: "[oss-security] 20220405 Xen Security Advisory 397 v2 (CVE-2022-26356) - Racy interactions between dirty vram tracking and paging log dirty hypercalls", tags: [ "mailing-list", ], url: "http://www.openwall.com/lists/oss-security/2022/04/05/1", }, { name: "DSA-5117", tags: [ "vendor-advisory", ], url: "https://www.debian.org/security/2022/dsa-5117", }, { name: "FEDORA-2022-dfbf7e2372", tags: [ "vendor-advisory", ], url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/", }, { name: "FEDORA-2022-64b2c02d29", tags: [ "vendor-advisory", ], url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/", }, { name: "GLSA-202402-07", tags: [ "vendor-advisory", ], url: "https://security.gentoo.org/glsa/202402-07", }, ], }, }, cveMetadata: { assignerOrgId: "23aa2041-22e1-471f-9209-9b7396fa234f", assignerShortName: "XEN", cveId: "CVE-2022-26356", datePublished: "2022-04-05T00:00:00", dateReserved: "2022-03-02T00:00:00", dateUpdated: "2024-08-03T05:03:32.753Z", state: "PUBLISHED", }, dataType: "CVE_RECORD", dataVersion: "5.1", "vulnerability-lookup:meta": { fkie_nvd: { configurations: "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*\", \"versionStartIncluding\": \"4.0.0\", \"versionEndExcluding\": \"4.12.0\", \"matchCriteriaId\": \"D4199860-E11E-4F84-BA0C-A9CB463C7A74\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*\", \"versionStartIncluding\": \"4.13.0\", \"versionEndExcluding\": \"4.14.0\", \"matchCriteriaId\": \"F64332BF-1144-4924-8413-FA14FB0A94B6\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*\", \"versionStartIncluding\": \"4.15.0\", \"versionEndExcluding\": \"4.16.0\", \"matchCriteriaId\": \"71566154-EA2A-4C5F-AC6A-8EFBD6159BB9\"}]}]}, {\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}, {\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"A930E247-0B43-43CB-98FF-6CE7B8189835\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"80E516C0-98A4-4ADE-B69F-66A772E2BAAA\"}]}]}]", descriptions: "[{\"lang\": \"en\", \"value\": \"Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.\"}, {\"lang\": \"es\", \"value\": \"Una activaci\\u00f3n del modo de registro sucio realizada por XEN_DMOP_track_dirty_vram (es llamada HVMOP_track_dirty_vram antes de Xen versi\\u00f3n 4.9) es producido con las hiperllamadas de registro sucio en curso. Una llamada a XEN_DMOP_track_dirty_vram con el tiempo apropiado puede habilitar log dirty mientras otra CPU est\\u00e1 todav\\u00eda en el proceso de desmontar las estructuras relacionadas con un modo log dirty previamente habilitado (XEN_DOMCTL_SHADOW_OP_OFF). Esto es debido a una falta de bloqueo mutuamente excluyente entre ambas operaciones y puede conllevar a que son a\\u00f1adidas entradas en ranuras ya liberadas, dando lugar a una p\\u00e9rdida de memoria\"}]", id: "CVE-2022-26356", lastModified: "2024-11-21T06:53:49.023", metrics: "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H\", \"baseScore\": 5.6, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.1, \"impactScore\": 4.0}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:L/AC:H/Au:N/C:N/I:N/A:C\", \"baseScore\": 4.0, \"accessVector\": \"LOCAL\", \"accessComplexity\": \"HIGH\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 1.9, \"impactScore\": 6.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}", published: "2022-04-05T13:15:07.727", references: "[{\"url\": \"http://www.openwall.com/lists/oss-security/2022/04/05/1\", \"source\": \"security@xen.org\", \"tags\": [\"Mailing List\", \"Patch\", \"Third Party Advisory\"]}, {\"url\": \"http://xenbits.xen.org/xsa/advisory-397.html\", \"source\": \"security@xen.org\", \"tags\": [\"Patch\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/\", \"source\": \"security@xen.org\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/\", \"source\": \"security@xen.org\"}, {\"url\": \"https://security.gentoo.org/glsa/202402-07\", \"source\": \"security@xen.org\"}, {\"url\": \"https://www.debian.org/security/2022/dsa-5117\", \"source\": \"security@xen.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://xenbits.xenproject.org/xsa/advisory-397.txt\", \"source\": \"security@xen.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2022/04/05/1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Patch\", \"Third Party Advisory\"]}, {\"url\": \"http://xenbits.xen.org/xsa/advisory-397.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://security.gentoo.org/glsa/202402-07\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://www.debian.org/security/2022/dsa-5117\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://xenbits.xenproject.org/xsa/advisory-397.txt\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}]", sourceIdentifier: "security@xen.org", vulnStatus: "Modified", weaknesses: "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-667\"}]}]", }, nvd: "{\"cve\":{\"id\":\"CVE-2022-26356\",\"sourceIdentifier\":\"security@xen.org\",\"published\":\"2022-04-05T13:15:07.727\",\"lastModified\":\"2024-11-21T06:53:49.023\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. 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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.