{"id":"CVE-2024-26878","revision":"ecae476fb75a48488a797f7369bc7e09","records":[{"revision":"ecae476fb75a48488a797f7369bc7e09","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-26878","aliases":[],"title":"quota: Fix potential NULL pointer dereference","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nquota: Fix potential NULL pointer dereference\n\nBelow race may cause NULL pointer dereference\n\nP1\t\t\t\t\tP2\ndquot_free_inode\t\t\tquota_off\n\t\t\t\t\t  drop_dquot_ref\n\t\t\t\t\t   remove_dquot_ref\n\t\t\t\t\t   dquots = i_dquot(inode)\n  dquots = i_dquot(inode)\n  srcu_read_lock\n  dquots[cnt]) != NULL (1)\n\t\t\t\t\t     dquots[type] = NULL (2)\n  spin_lock(&dquots[cnt]->dq_dqb_lock) (3)\n   ....\n\nIf dquot_free_inode(or other routines) checks inode's quota pointers (1)\nbefore quota_off sets it to NULL(2) and use it (3) after that, NULL pointer\ndereference will be triggered.\n\nSo let's fix it by using a temporary pointer to avoid this issue.","state":0,"publishedAt":"2024-04-17T10:27:35.838+00:00","modifiedAt":"2026-10-15T00:39:00.741+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/quota/dquot.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac\",\n                            \"lessThan\": \"8514899c1a4edf802f03c408db901063aa3f05a1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac\",\n                            \"lessThan\": \"49669f8e7eb053f91d239df7b1bfb4500255a9d0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac\",\n                            \"lessThan\": \"61380537aa6dd32d8a723d98b8f1bd1b11d8fee0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac\",\n                            \"lessThan\": \"1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac\",\n                            \"lessThan\": \"7f9e833fc0f9b47be503af012eb5903086939754\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac\",\n                            \"lessThan\": \"40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac\",\n                            \"lessThan\": \"f2649d98aa9ca8623149b3cb8df00c944f5655c7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac\",\n                            \"lessThan\": \"6afc9f4434fa8063aa768c2bf5bf98583aee0877\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac\",\n                            \"lessThan\": \"d0aa72604fbd80c8aabb46eda00535ed35570f1f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/quota/dquot.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"4.19.311\",\n                            \"lessThanOrEqual\": \"4.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.273\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.214\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.153\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.83\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.23\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.7.11\",\n                            \"lessThanOrEqual\": \"6.7.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.8.2\",\n                            \"lessThanOrEqual\": \"6.8.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.9\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1","https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0","https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0","https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25","https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754","https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5","https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7","https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877","https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-26878","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-26878","identifiers":["CVE-2024-26878"]},"retained":false,"historicalAffected":[]}],"coverage":[]}