{"id":"CVE-2023-52449","summary":"mtd: Fix gluebi NULL pointer dereference caused by ftl notifier","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: Fix gluebi NULL pointer dereference caused by ftl notifier\n\nIf both ftl.ko and gluebi.ko are loaded, the notifier of ftl\ntriggers NULL pointer dereference when trying to access\n‘gluebi-\u003edesc’ in gluebi_read().\n\nubi_gluebi_init\n  ubi_register_volume_notifier\n    ubi_enumerate_volumes\n      ubi_notify_all\n        gluebi_notify    nb-\u003enotifier_call()\n          gluebi_create\n            mtd_device_register\n              mtd_device_parse_register\n                add_mtd_device\n                  blktrans_notify_add   not-\u003eadd()\n                    ftl_add_mtd         tr-\u003eadd_mtd()\n                      scan_header\n                        mtd_read\n                          mtd_read_oob\n                            mtd_read_oob_std\n                              gluebi_read   mtd-\u003eread()\n                                gluebi-\u003edesc - NULL\n\nDetailed reproduction information available at the Link [1],\n\nIn the normal case, obtain gluebi-\u003edesc in the gluebi_get_device(),\nand access gluebi-\u003edesc in the gluebi_read(). However,\ngluebi_get_device() is not executed in advance in the\nftl_add_mtd() process, which leads to NULL pointer dereference.\n\nThe solution for the gluebi module is to run jffs2 on the UBI\nvolume without considering working with ftl or mtdblock [2].\nTherefore, this problem can be avoided by preventing gluebi from\ncreating the mtdblock device after creating mtd partition of the\ntype MTD_UBIVOLUME.","modified":"2026-04-02T09:42:47.547956Z","published":"2024-02-22T16:21:40.841Z","related":["SUSE-SU-2024:0855-1","SUSE-SU-2024:0856-1","SUSE-SU-2024:0857-1","SUSE-SU-2024:0858-1","SUSE-SU-2024:0900-1","SUSE-SU-2024:0900-2","SUSE-SU-2024:0910-1","SUSE-SU-2024:0925-1","SUSE-SU-2024:0926-1","SUSE-SU-2024:0975-1","SUSE-SU-2024:0976-1","SUSE-SU-2024:0977-1","SUSE-SU-2024:1669-1","USN-6818-2","USN-6819-2"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52449.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/001a3f59d8c914ef8273461d4bf495df384cc5f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1bf4fe14e97cda621522eb2f28b0a4e87c5b0745"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5389407bba1eab1266c6d83e226fb0840cb98dd5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a43bdc376deab5fff1ceb93dca55bcab8dbdc1d6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aeba358bcc8ffddf9b4a9bd0e5ec9eb338d46022"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b36aaa64d58aaa2f2cbc8275e89bae76a2b6c3dc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cfd7c9d260dc0a3baaea05a122a19ab91e193c65"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d8ac2537763b54d278b80b2b080e1652523c7d4c"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52449.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52449"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2ba3d76a1e29f2ba64fbc762875cf9fb2d4ba2ba"},{"fixed":"aeba358bcc8ffddf9b4a9bd0e5ec9eb338d46022"},{"fixed":"1bf4fe14e97cda621522eb2f28b0a4e87c5b0745"},{"fixed":"001a3f59d8c914ef8273461d4bf495df384cc5f8"},{"fixed":"d8ac2537763b54d278b80b2b080e1652523c7d4c"},{"fixed":"5389407bba1eab1266c6d83e226fb0840cb98dd5"},{"fixed":"cfd7c9d260dc0a3baaea05a122a19ab91e193c65"},{"fixed":"b36aaa64d58aaa2f2cbc8275e89bae76a2b6c3dc"},{"fixed":"a43bdc376deab5fff1ceb93dca55bcab8dbdc1d6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52449.json"}}],"schema_version":"1.7.5"}