{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49274","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-02-26T01:49:39.297Z","datePublished":"2025-02-26T01:56:19.586Z","dateUpdated":"2026-08-05T08:54:31.739Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T08:54:31.739Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix crash when mount with quota enabled\n\nThere is a reported crash when mounting ocfs2 with quota enabled.\n\n  RIP: 0010:ocfs2_qinfo_lock_res_init+0x44/0x50 [ocfs2]\n  Call Trace:\n    ocfs2_local_read_info+0xb9/0x6f0 [ocfs2]\n    dquot_load_quota_sb+0x216/0x470\n    dquot_load_quota_inode+0x85/0x100\n    ocfs2_enable_quotas+0xa0/0x1c0 [ocfs2]\n    ocfs2_fill_super.cold+0xc8/0x1bf [ocfs2]\n    mount_bdev+0x185/0x1b0\n    legacy_get_tree+0x27/0x40\n    vfs_get_tree+0x25/0xb0\n    path_mount+0x465/0xac0\n    __x64_sys_mount+0x103/0x140\n\nIt is caused by when initializing dqi_gqlock, the corresponding dqi_type\nand dqi_sb are not properly initialized.\n\nThis issue is introduced by commit 6c85c2c72819, which wants to avoid\naccessing uninitialized variables in error cases.  So make global quota\ninfo properly initialized."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached only via the local mount path (mount → ocfs2_fill_super → ocfs2_enable_quotas → ocfs2_local_read_info); ocfs2 lacks a network-facing packet handler that triggers this code.\nAC:L - Mounting any ocfs2 volume with the on-disk usrquota/grpquota RO_COMPAT features enabled reliably hits ocfs2_qinfo_lock_res_init with uninitialized dqi_gi fields; no race or attacker-uncontrollable condition is required.\nPR:N - An unprivileged attacker can supply a quota-enabled ocfs2 image (e.g., via mkfs.ocfs2 on a file) without credentials on the target; ocfs2 is not FS_USERNS_MOUNT, so the privileged mount itself is performed by the victim.\nUI:R - Exploitation requires a user/administrator to mount (or remount RW) the attacker-supplied or quota-enabled ocfs2 filesystem to reach ocfs2_enable_quotas.\nS:U - Impact is confined to the host kernel's own privilege boundary (oops or memory corruption in-kernel); there is no VM/IOMMU/sandbox escape.\nC:H - kmalloc'd ocfs2_mem_dqinfo leaves dqi_gi.dqi_sb uninitialized, so OCFS2_SB() dereferences attacker-influencable heap contents; with local heap grooming this yields a controlled read-through of kernel memory, and when uncertain the higher impact is required.\nI:H - The same uninitialized super_block pointer flows into ocfs2_lock_res_init_common → ocfs2_add_lockres_tracking → list_add on osb->osb_dlm_debug, giving a write primitive if the pointer is groomed, so integrity impact is High.\nA:H - The reported and expected outcome is a kernel oops in ocfs2_qinfo_lock_res_init when the garbage pointer is unmapped, which is a full availability loss."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/quota_global.c","fs/ocfs2/quota_local.c"],"versions":[{"version":"6c85c2c728193d19d6a908ae9fb312d0325e65ca","lessThan":"7c5312fdb1dcfdc1951b018669af88d5d6420b31","status":"affected","versionType":"git"},{"version":"6c85c2c728193d19d6a908ae9fb312d0325e65ca","lessThan":"01931e1c4e3de5d777253acae64c0e8fd071a1dd","status":"affected","versionType":"git"},{"version":"6c85c2c728193d19d6a908ae9fb312d0325e65ca","lessThan":"eda31f77317647b9fbf889779ee1fb6907651865","status":"affected","versionType":"git"},{"version":"6c85c2c728193d19d6a908ae9fb312d0325e65ca","lessThan":"de19433423c7bedabbd4f9a25f7dbc62c5e78921","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/quota_global.c","fs/ocfs2/quota_local.c"],"versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","status":"unaffected","versionType":"semver"},{"version":"5.15.33","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16.19","lessThanOrEqual":"5.16.*","status":"unaffected","versionType":"semver"},{"version":"5.17.2","lessThanOrEqual":"5.17.*","status":"unaffected","versionType":"semver"},{"version":"5.18","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.15.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.16.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.17.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/7c5312fdb1dcfdc1951b018669af88d5d6420b31"},{"url":"https://git.kernel.org/stable/c/01931e1c4e3de5d777253acae64c0e8fd071a1dd"},{"url":"https://git.kernel.org/stable/c/eda31f77317647b9fbf889779ee1fb6907651865"},{"url":"https://git.kernel.org/stable/c/de19433423c7bedabbd4f9a25f7dbc62c5e78921"}],"title":"ocfs2: fix crash when mount with quota enabled","x_generator":{"engine":"bippy-1.2.0"}}}}