{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-27389","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-25T13:47:42.676Z","datePublished":"2024-05-01T13:05:09.224Z","dateUpdated":"2026-08-05T11:29:24.931Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:29:24.931Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\npstore: inode: Only d_invalidate() is needed\n\nUnloading a modular pstore backend with records in pstorefs would\ntrigger the dput() double-drop warning:\n\n  WARNING: CPU: 0 PID: 2569 at fs/dcache.c:762 dput.part.0+0x3f3/0x410\n\nUsing the combo of d_drop()/dput() (as mentioned in\nDocumentation/filesystems/vfs.rst) isn't the right approach here, and\nleads to the reference counting problem seen above. Use d_invalidate()\nand update the code to not bother checking for error codes that can\nnever happen.\n\n---"}],"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 lives in the pstorefs VFS layer (fs/pstore/inode.c) and is reached only through local interfaces — an open file descriptor on a pstorefs record plus pstore backend teardown (module removal, driver unbind, or MTD device-removal notifier). No network or adjacent-network path exists.\nAC:L - The double-drop is deterministic, not a race: every record belonging to the unregistering backend takes the buggy path unconditionally, and keeping a record file open across teardown is fully under the attacker's control. No unpredictable memory layout or victim state is required to reach the underflow.\nPR:L - Consistent with this repo's scoring of driver-removal/rmmod-triggered UAFs, a local unprivileged process supplies the decisive half of the exploit — holding the fd, then driving slab reclaim of the freed pstore_private/dentry and consuming the primitives via read()/close(); backend unregistration also occurs on non-rmmod paths such as mtdpstore_notify_remove() and platform-driver removal during normal system operation.\nUI:N - No victim action is needed — the attacker performs the file open, the backend teardown, and the subsequent read()/close() that dereference the freed objects. Nothing requires a second user to interact with the system.\nS:U - The corruption is confined to kernel dcache and slab objects within the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed. This is standard in-kernel memory corruption.\nC:H - The premature dentry kill evicts the inode and frees pstore_private/pstore_record/record->buf while an open file still points at them via seq_file->private, so pstore_file_read() calls simple_read_from_buffer() with a freed, reclaimable source pointer and length — a controllable arbitrary kernel-memory read into userspace.\nI:H - The dentry refcount underflow frees the dentry while a file descriptor still holds it, so the later fput()/path_put()/dput() performs lockref decrements and d_child/d_subdirs list manipulation on reclaimed slab memory, yielding a write primitive suitable for heap-spray exploitation.\nA:H - At minimum the bug triggers WARNING at fs/dcache.c:762, which is fatal on the panic_on_warn configurations common in Android, hardened, and cloud kernels; with an open record file it produces a genuine dcache/slab use-after-free that reliably oopses or panics the kernel."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/pstore/inode.c"],"versions":[{"version":"609e28bb139e53621521130f0d4aea27a725d465","lessThan":"d0ee2a8adb6673382cce8a4280e1ca0849b3b783","status":"affected","versionType":"git"},{"version":"609e28bb139e53621521130f0d4aea27a725d465","lessThan":"db6e5e16f1ee9e3b01d2f71c7f0ba945f4bf0f4e","status":"affected","versionType":"git"},{"version":"609e28bb139e53621521130f0d4aea27a725d465","lessThan":"4cdf9006fc095af71da80e9b5f48a32e991b9ed3","status":"affected","versionType":"git"},{"version":"609e28bb139e53621521130f0d4aea27a725d465","lessThan":"cb9e802e49c24eeb3af35e9e8c04d526f35f112a","status":"affected","versionType":"git"},{"version":"609e28bb139e53621521130f0d4aea27a725d465","lessThan":"340682ed1932b8e3bd0bfc6c31a0c6354eb57cc6","status":"affected","versionType":"git"},{"version":"609e28bb139e53621521130f0d4aea27a725d465","lessThan":"a43e0fc5e9134a46515de2f2f8d4100b74e50de3","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/pstore/inode.c"],"versions":[{"version":"5.8","status":"affected"},{"version":"0","lessThan":"5.8","status":"unaffected","versionType":"semver"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.83","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.23","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.11","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8.2","lessThanOrEqual":"6.8.*","status":"unaffected","versionType":"semver"},{"version":"6.9","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":"5.8","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.1.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.6.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.7.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.8.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.9"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d0ee2a8adb6673382cce8a4280e1ca0849b3b783"},{"url":"https://git.kernel.org/stable/c/db6e5e16f1ee9e3b01d2f71c7f0ba945f4bf0f4e"},{"url":"https://git.kernel.org/stable/c/4cdf9006fc095af71da80e9b5f48a32e991b9ed3"},{"url":"https://git.kernel.org/stable/c/cb9e802e49c24eeb3af35e9e8c04d526f35f112a"},{"url":"https://git.kernel.org/stable/c/340682ed1932b8e3bd0bfc6c31a0c6354eb57cc6"},{"url":"https://git.kernel.org/stable/c/a43e0fc5e9134a46515de2f2f8d4100b74e50de3"}],"title":"pstore: inode: Only d_invalidate() is needed","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-27389","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-05-09T18:38:29.598548Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-07-05T17:22:49.585Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T00:34:52.207Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/db6e5e16f1ee9e3b01d2f71c7f0ba945f4bf0f4e","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/4cdf9006fc095af71da80e9b5f48a32e991b9ed3","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/cb9e802e49c24eeb3af35e9e8c04d526f35f112a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/340682ed1932b8e3bd0bfc6c31a0c6354eb57cc6","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/a43e0fc5e9134a46515de2f2f8d4100b74e50de3","tags":["x_transferred"]}]}]}}