{"id":"CVE-2017-12190","state":"PUBLISHED","title":"The bio_map_user_iov and bio_unmap_user functions in block/bio.c in the Linux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O vector has small consecutive buffers be","description":"The bio_map_user_iov and bio_unmap_user functions in block/bio.c in the Linux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O vector has small consecutive buffers belonging to the same page. The bio_add_pc_page function merges them into one, but the page reference is never dropped. This causes a memory leak and possible system lockup (exploitable against the host OS by a guest OS user, if a SCSI disk is passed through to a virtual machine) due to an out-of-memory condition.","publishedAt":"2017-11-22T18:00:00.000Z","updatedAt":"2024-08-05T18:28:16.645Z","severity":null,"assigner":"redhat","products":["n/a Linux kernel through v4.14-rc5"],"affected":[{"vendor":"n/a","product":"Linux kernel through v4.14-rc5","versions":[{"version":"Linux kernel through v4.14-rc5","status":"affected"}]}],"references":["http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058","http://www.securityfocus.com/bid/101911","https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html","https://usn.ubuntu.com/3583-2/","https://access.redhat.com/errata/RHSA-2018:1854","https://usn.ubuntu.com/3582-1/","http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.8","http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95d78c28b5a85bacbc29b8dba7c04babb9b0d467","https://access.redhat.com/errata/RHSA-2018:1062","https://github.com/torvalds/linux/commit/95d78c28b5a85bacbc29b8dba7c04babb9b0d467","https://access.redhat.com/errata/RHSA-2018:0654","https://usn.ubuntu.com/3583-1/","https://bugzilla.redhat.com/show_bug.cgi?id=1495089","https://github.com/torvalds/linux/commit/2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058","http://seclists.org/oss-sec/2017/q4/52","https://access.redhat.com/errata/RHSA-2018:0676","https://usn.ubuntu.com/3582-2/","https://access.redhat.com/errata/RHSA-2019:1170","https://access.redhat.com/errata/RHSA-2019:1190","https://support.f5.com/csp/article/K93472064?utm_source=f5support&amp%3Butm_medium=RSS"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T19:43:15.172Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2017/12xxx/CVE-2017-12190.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2017-12190","state":"PUBLISHED","datePublished":"2017-11-22T18:00:00.000Z","dateUpdated":"2024-08-05T18:28:16.645Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2017-08-01T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"The bio_map_user_iov and bio_unmap_user functions in block/bio.c in the Linux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O vector has small consecutive buffers belonging to the same page. 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