{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-47690","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-09-30T16:00:12.942Z","datePublished":"2024-10-21T11:53:29.870Z","dateUpdated":"2026-08-05T11:39:27.223Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:39:27.223Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: get rid of online repaire on corrupted directory\n\nsyzbot reports a f2fs bug as below:\n\nkernel BUG at fs/f2fs/inode.c:896!\nRIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896\nCall Trace:\n evict+0x532/0x950 fs/inode.c:704\n dispose_list fs/inode.c:747 [inline]\n evict_inodes+0x5f9/0x690 fs/inode.c:797\n generic_shutdown_super+0x9d/0x2d0 fs/super.c:627\n kill_block_super+0x44/0x90 fs/super.c:1696\n kill_f2fs_super+0x344/0x690 fs/f2fs/super.c:4898\n deactivate_locked_super+0xc4/0x130 fs/super.c:473\n cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373\n task_work_run+0x24f/0x310 kernel/task_work.c:228\n ptrace_notify+0x2d2/0x380 kernel/signal.c:2402\n ptrace_report_syscall include/linux/ptrace.h:415 [inline]\n ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]\n syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173\n syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]\n __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]\n syscall_exit_to_user_mode+0x279/0x370 kernel/entry/common.c:218\n do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896\n\nOnline repaire on corrupted directory in f2fs_lookup() can generate\ndirty data/meta while racing w/ readonly remount, it may leave dirty\ninode after filesystem becomes readonly, however, checkpoint() will\nskips flushing dirty inode in a state of readonly mode, result in\nabove panic.\n\nLet's get rid of online repaire in f2fs_lookup(), and leave the work\nto fsck.f2fs."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerability is reached through local filesystem operations — mounting an f2fs image, ordinary path lookup syscalls, and a remount — with no network protocol involved. Even in the removable-media/automount scenario the triggering actions are local syscalls, and Local scores higher than Physical.\nAC:L - The attacker controls both sides of the race (a lookup loop against `mount -o remount,ro`) and can repeat it indefinitely until the window is hit; the `f2fs_readonly()` check in `__recover_dot_dentries()` is checked once with no locking against the remount. Setting the on-disk `F2FS_INLINE_DOTS` bit is trivial and requires no special conditions.\nPR:L - Reaching `f2fs_lookup()` and thus `__recover_dot_dentries()` requires only an unprivileged local account with search access to the mount; the flag arrives from disk via a crafted image or a legacy mkfs.f2fs volume that an automount daemon (Android vold, udisks2) mounts on the attacker's behalf. No capability check exists anywhere on the lookup path.\nUI:N - No victim action is needed — the attacker performs the lookups, remount and unmount itself, and in the removable-media case the automount daemon mounts the volume without any user interaction.\nS:U - The corruption and the resulting panic/use-after-free are confined to the kernel's own memory and the f2fs superblock structures; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - After the WARN path leaves the evicted inode linked in `sbi->inode_list[DIRTY_META]`, `f2fs_sync_inode_meta()` reads a freed `f2fs_inode_info` via `list_first_entry()` and `igrab()`, giving a use-after-free read of reclaimed slab memory that can be heap-sprayed to disclose kernel data.\nI:H - The same dangling `gdirty_list` entry yields UAF writes through `list_del_init()` in `f2fs_inode_synced()` and `f2fs_update_inode_page()` operating on a reclaimed object, a well-known primitive for heap-spray-based control-flow hijack; the bug additionally leaves persistent on-disk metadata inconsistency requiring fsck.\nA:H - The reported failure is an outright kernel panic at `fs/f2fs/inode.c:896` (`BUG_ON` under CONFIG_F2FS_CHECK_FS, or WARN plus a subsequent use-after-free oops otherwise), triggered on unmount and reproducible on demand."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/f2fs.h","fs/f2fs/namei.c","include/linux/f2fs_fs.h"],"versions":[{"version":"510022a85839a8409d1e6a519bb86ce71a84f30a","lessThan":"e8d64f598eeb079c42a52deaa3a91312c736a49d","status":"affected","versionType":"git"},{"version":"510022a85839a8409d1e6a519bb86ce71a84f30a","lessThan":"f4746f2d79507f65cfbde11d3c39ee8338aa50af","status":"affected","versionType":"git"},{"version":"510022a85839a8409d1e6a519bb86ce71a84f30a","lessThan":"f9ce2f550d53d044ecfb5ce996406cf42cd6b84d","status":"affected","versionType":"git"},{"version":"510022a85839a8409d1e6a519bb86ce71a84f30a","lessThan":"8be95cd607478d85fa4626e86f811e785905bcbf","status":"affected","versionType":"git"},{"version":"510022a85839a8409d1e6a519bb86ce71a84f30a","lessThan":"bcefd0b0611f35b560d0a7281d87529fbe7a1e32","status":"affected","versionType":"git"},{"version":"510022a85839a8409d1e6a519bb86ce71a84f30a","lessThan":"884ee6dc85b959bc152f15bca80c30f06069e6c4","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/f2fs/f2fs.h","fs/f2fs/namei.c","include/linux/f2fs_fs.h"],"versions":[{"version":"4.1","status":"affected"},{"version":"0","lessThan":"4.1","status":"unaffected","versionType":"semver"},{"version":"5.15.168","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.113","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.54","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.10.13","lessThanOrEqual":"6.10.*","status":"unaffected","versionType":"semver"},{"version":"6.11.2","lessThanOrEqual":"6.11.*","status":"unaffected","versionType":"semver"},{"version":"6.12","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":"4.1","versionEndExcluding":"5.15.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.1.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.6.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.10.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.11.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.12"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/e8d64f598eeb079c42a52deaa3a91312c736a49d"},{"url":"https://git.kernel.org/stable/c/f4746f2d79507f65cfbde11d3c39ee8338aa50af"},{"url":"https://git.kernel.org/stable/c/f9ce2f550d53d044ecfb5ce996406cf42cd6b84d"},{"url":"https://git.kernel.org/stable/c/8be95cd607478d85fa4626e86f811e785905bcbf"},{"url":"https://git.kernel.org/stable/c/bcefd0b0611f35b560d0a7281d87529fbe7a1e32"},{"url":"https://git.kernel.org/stable/c/884ee6dc85b959bc152f15bca80c30f06069e6c4"}],"title":"f2fs: get rid of online repaire on corrupted directory","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-47690","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-10-21T13:06:03.889382Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-10-21T13:14:15.315Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T22:20:55.203Z"}}]}}