{"id":"CVE-2022-26356","state":"PUBLISHED","title":"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 befor","description":"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.","publishedAt":"2022-04-05T00:00:00.000Z","updatedAt":"2024-08-03T05:03:32.753Z","severity":null,"assigner":"XEN","products":["Xen xen"],"affected":[{"vendor":"Xen","product":"xen","versions":[{"version":"consult Xen advisory XSA-397","status":"unknown"}]}],"references":["https://xenbits.xenproject.org/xsa/advisory-397.txt","http://xenbits.xen.org/xsa/advisory-397.html","http://www.openwall.com/lists/oss-security/2022/04/05/1","https://www.debian.org/security/2022/dsa-5117","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/","https://security.gentoo.org/glsa/202402-07"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:49.689Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/26xxx/CVE-2022-26356.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2022-26356","state":"PUBLISHED","datePublished":"2022-04-05T00:00:00.000Z","dateUpdated":"2024-08-03T05:03:32.753Z","assignerShortName":"XEN","assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","dateReserved":"2022-03-02T00:00:00.000Z"},"containers":{"cna":{"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."}],"affected":[{"vendor":"Xen","product":"xen","versions":[{"version":"consult Xen advisory XSA-397","status":"unknown"}]}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-397.txt"},{"url":"http://xenbits.xen.org/xsa/advisory-397.html"},{"url":"http://www.openwall.com/lists/oss-security/2022/04/05/1","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":"https://www.debian.org/security/2022/dsa-5117","name":"DSA-5117","tags":["vendor-advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/","name":"FEDORA-2022-dfbf7e2372","tags":["vendor-advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/","name":"FEDORA-2022-64b2c02d29","tags":["vendor-advisory"]},{"url":"https://security.gentoo.org/glsa/202402-07","name":"GLSA-202402-07","tags":["vendor-advisory"]}],"metrics":[{"other":{"type":"unknown","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."}]}}}}],"problemTypes":[{"descriptions":[{"type":"text","lang":"en","description":"unknown"}]}],"providerMetadata":{"shortName":"XEN","orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","dateUpdated":"2024-02-04T08:06:38.987Z"},"credits":[{"lang":"en","value":"{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Roger Pau Monné of Citrix.'}]}}}"}]},"adp":[{"title":"CVE Program Container","references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-397.txt","tags":["x_transferred"]},{"url":"http://xenbits.xen.org/xsa/advisory-397.html","tags":["x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2022/04/05/1","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":"https://www.debian.org/security/2022/dsa-5117","name":"DSA-5117","tags":["vendor-advisory","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/","name":"FEDORA-2022-dfbf7e2372","tags":["vendor-advisory","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/","name":"FEDORA-2022-64b2c02d29","tags":["vendor-advisory","x_transferred"]},{"url":"https://security.gentoo.org/glsa/202402-07","name":"GLSA-202402-07","tags":["vendor-advisory","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T05:03:32.753Z"}}]}}}