{"id":"CVE-2021-28038","details":"An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.","modified":"2026-04-16T00:08:40.192809388Z","published":"2021-03-05T18:15:13Z","withdrawn":"2026-01-27T04:04:35.137061Z","related":["SUSE-SU-2021:1175-1","SUSE-SU-2021:1176-1","SUSE-SU-2021:1177-1","SUSE-SU-2021:1210-1","SUSE-SU-2021:1211-1","SUSE-SU-2021:1238-1","SUSE-SU-2021:1573-1","SUSE-SU-2021:1596-1","SUSE-SU-2021:1617-1","SUSE-SU-2021:1623-1","SUSE-SU-2021:1624-1","SUSE-SU-2021:1625-1","SUSE-SU-2021:1975-1","SUSE-SU-2021:1977-1","openSUSE-SU-2021:0532-1","openSUSE-SU-2021:0758-1","openSUSE-SU-2021:1975-1","openSUSE-SU-2021:1977-1"],"references":[{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/03/05/1"},{"type":"FIX","url":"http://xenbits.xen.org/xsa/advisory-367.html"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210409-0001/"},{"type":"WEB","url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2991397d23ec597405b116d96de3813420bdcbc3"}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"}]}