{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-39472", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-25T14:23:23.745Z", "datePublished": "2024-07-05T06:42:03.495Z", "dateUpdated": "2026-08-05T11:33:29.670Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:33:29.670Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix log recovery buffer allocation for the legacy h_size fixup\n\nCommit a70f9fe52daa (\"xfs: detect and handle invalid iclog size set by\nmkfs\") added a fixup for incorrect h_size values used for the initial\numount record in old xfsprogs versions. Later commit 0c771b99d6c9\n(\"xfs: clean up calculation of LR header blocks\") cleaned up the log\nreover buffer calculation, but stoped using the fixed up h_size value\nto size the log recovery buffer, which can lead to an out of bounds\naccess when the incorrect h_size does not come from the old mkfs\ntool, but a fuzzer.\n\nFix this by open coding xlog_logrec_hblks and taking the fixed h_size\ninto account for this calculation." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H", "baseScore": 7.3, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached only through XFS log recovery at mount time on a locally attached block device or image file; no network or remote-peer data reaches this code. Delivery via removable media still requires the image to be mounted on the local system.\nAC:L - Every input is attacker-chosen on-disk data — `sb_logsunit` (raises `m_logbsize` to 256K with no mount option needed), and `h_size`/`h_len`/`h_num_logops`/`h_version` in the tail log record — so the undersized `hbp` and the ~224 KB overread happen deterministically on every mount, with no race and no memory layout to groom.\nPR:N - The attacker needs no account or privilege on the target; they only need to hand over a crafted XFS image (USB stick, disk image, exported LUN) that is then mounted by the victim or by an automounter such as udisks2 on a desktop or kiosk. Equivalently, an unprivileged local user on an automount-enabled system reaches it with PR:L/UI:N, which yields the identical exploitability score.\nUI:R - A user or automount service must mount the malicious filesystem with a dirty log so that `xlog_do_recovery_pass()` runs; the attacker cannot initiate the mount themselves.\nS:U - The out-of-bounds access and its consequences stay inside the kernel's own security authority — no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `xlog_cksum()` and `xlog_unpack_data()` read at 32 KB strides up to ~224 KB past a 512-byte `kvzalloc()` slab object, and on a non-CRC (v4) image the harvested heap dwords are copied into the replayed log data and committed to the filesystem, giving the attacker a large, readable kernel heap disclosure.\nI:L - There is no out-of-bounds write — `dbp` is sized from the fixed-up `h_size` and `bblks <= BTOBB(h_size)` — but the out-of-bounds kernel heap dwords are spliced into the log record data by `xlog_unpack_data()` and replayed into on-disk metadata, producing limited, attacker-uncontrolled modification of filesystem data.\nA:H - Reading roughly 224 KB beyond a 512-byte slab allocation readily crosses into unmapped memory, producing a page fault/oops (or a KASAN slab-out-of-bounds panic) during mount, taking down the system." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/xfs/xfs_log_recover.c" ], "versions": [ { "version": "0c771b99d6c9a0552fea5cc43669b726dad8f659", "lessThan": "f754591b17d0ee91c2b45fe9509d0cdc420527cb", "status": "affected", "versionType": "git" }, { "version": "0c771b99d6c9a0552fea5cc43669b726dad8f659", "lessThan": "57835c0e7152e36b03875dd6c56dfeed685c1b1f", "status": "affected", "versionType": "git" }, { "version": "0c771b99d6c9a0552fea5cc43669b726dad8f659", "lessThan": "c2389c074973aa94e34992e7f66dac0de37595b5", "status": "affected", "versionType": "git" }, { "version": "0c771b99d6c9a0552fea5cc43669b726dad8f659", "lessThan": "45cf976008ddef4a9c9a30310c9b4fb2a9a6602a", "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/xfs/xfs_log_recover.c" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.165", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.105", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.46", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "5.10", "versionEndExcluding": "5.15.165" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.105" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.46" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/f754591b17d0ee91c2b45fe9509d0cdc420527cb" }, { "url": "https://git.kernel.org/stable/c/57835c0e7152e36b03875dd6c56dfeed685c1b1f" }, { "url": "https://git.kernel.org/stable/c/c2389c074973aa94e34992e7f66dac0de37595b5" }, { "url": "https://git.kernel.org/stable/c/45cf976008ddef4a9c9a30310c9b4fb2a9a6602a" } ], "title": "xfs: fix log recovery buffer allocation for the legacy h_size fixup", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/45cf976008ddef4a9c9a30310c9b4fb2a9a6602a", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T21:56:05.270Z" } }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-39472", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T17:07:45.783551Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:41.426Z" } } ] } }