{"containers":{"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"descriptions":[{"lang":"en","value":"An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2021-07-12T04:06:41.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"tags":["x_refsource_MISC"],"url":"https://xenbits.xenproject.org/xsa/advisory-350.html"},{"name":"DSA-4843","tags":["vendor-advisory","x_refsource_DEBIAN"],"url":"https://www.debian.org/security/2021/dsa-4843"},{"tags":["x_refsource_CONFIRM"],"url":"https://security.netapp.com/advisory/ntap-20210205-0001/"},{"name":"[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update","tags":["mailing-list","x_refsource_MLIST"],"url":"https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html"},{"name":"[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update","tags":["mailing-list","x_refsource_MLIST"],"url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"},{"name":"GLSA-202107-30","tags":["vendor-advisory","x_refsource_GENTOO"],"url":"https://security.gentoo.org/glsa/202107-30"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-29569","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://xenbits.xenproject.org/xsa/advisory-350.html","refsource":"MISC","url":"https://xenbits.xenproject.org/xsa/advisory-350.html"},{"name":"DSA-4843","refsource":"DEBIAN","url":"https://www.debian.org/security/2021/dsa-4843"},{"name":"https://security.netapp.com/advisory/ntap-20210205-0001/","refsource":"CONFIRM","url":"https://security.netapp.com/advisory/ntap-20210205-0001/"},{"name":"[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update","refsource":"MLIST","url":"https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html"},{"name":"[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update","refsource":"MLIST","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"},{"name":"GLSA-202107-30","refsource":"GENTOO","url":"https://security.gentoo.org/glsa/202107-30"}]}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T16:55:10.494Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://xenbits.xenproject.org/xsa/advisory-350.html"},{"name":"DSA-4843","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred"],"url":"https://www.debian.org/security/2021/dsa-4843"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://security.netapp.com/advisory/ntap-20210205-0001/"},{"name":"[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update","tags":["mailing-list","x_refsource_MLIST","x_transferred"],"url":"https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html"},{"name":"[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update","tags":["mailing-list","x_refsource_MLIST","x_transferred"],"url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"},{"name":"GLSA-202107-30","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"],"url":"https://security.gentoo.org/glsa/202107-30"}]}]},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2020-29569","datePublished":"2020-12-15T17:00:36.000Z","dateReserved":"2020-12-04T00:00:00.000Z","dateUpdated":"2024-08-04T16:55:10.494Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}