CVE-2024-41086

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the attacker only needs to supply the image, and the mounting privilege belongs to the victim, not the attacker.\nUI:R - A user or administrator must mount the crafted image (or insert removable media that a desktop auto-mounter mounts) for `bch2_read_super()` to reach the vulnerable loop.\nS:U - The out-of-bounds read and its consequences are confined to the kernel's own memory and the kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to ~128 KB of kernel heap beyond the superblock slab allocation is read and each `u16` is decoded into an exact error-string name when below `BCH_SB_ERR_MAX`, disclosing adjacent heap contents through the kernel log \u2014 far beyond a strictly bounded few-byte read.\nI:H - Out-of-bounds heap values flow into `__set_bit(e, c->sb.errors_silent)` in `bch2_sb_set_downgrade()`, silently suppressing filesystem consistency error detection during recovery, and the unvalidated malformed section reaches the superblock write-back path, corrupting on-disk metadata handling.\nA:H - The slab-out-of-bounds read reported by syzbot panics KASAN/hardened kernels immediately, and a wild ~32-page read plus a multi-megabyte printbuf expansion can oops or exhaust memory on production kernels."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/bcachefs/sb-downgrade.c"], "versions": [{"version": "84f1638795da1ff2084597de4251e9054f1ad728", "lessThan": "bf920ed92ef24dcd6970c88881cd4700b3acf05b", "status": "affected", "versionType": "git"}, {"version": "84f1638795da1ff2084597de4251e9054f1ad728", "lessThan": "692aa7a54b2b28d59f24b3bf8250837805484b99", "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/bcachefs/sb-downgrade.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.9.8", "lessThanOrEqual": "6.9.*", "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": "6.7", "versionEndExcluding": "6.9.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bf920ed92ef24dcd6970c88881cd4700b3acf05b"}, {"url": "https://git.kernel.org/stable/c/692aa7a54b2b28d59f24b3bf8250837805484b99"}], "title": "bcachefs: Fix sb_field_downgrade validation", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:46:52.363Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/bf920ed92ef24dcd6970c88881cd4700b3acf05b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/692aa7a54b2b28d59f24b3bf8250837805484b99", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-41086", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:20:49.092454Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:58.845Z"}}]}}

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{"bugzilla": {"description": "kernel: bcachefs: Fix sb_field_downgrade validation", "id": "2300482", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2300482"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbcachefs: Fix sb_field_downgrade validation\n- bch2_sb_downgrade_validate() wasn't checking for a downgrade entry\nextending past the end of the superblock section\n- for_each_downgrade_entry() is used in to_text() and needs to work on\nmalformed input; it also was missing a check for a field extending\npast the end of the section", "A flaw was found in the bcachefs module in the Linux kernel. In some conditions, an out-of-bounds read of 2 bytes can be triggered due to an incomplete validation of malformed input, resulting in a denial of service."], "name": "CVE-2024-41086", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-41086\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-41086\nhttps://lore.kernel.org/linux-cve-announce/2024072951-CVE-2024-41086-0dba@gregkh/T"], "statement": "The bcachefs module is not built in the kernel shipped in Red Hat Enterprise Linux, so it is not affected by this vulnerability.", "threat_severity": "Low"}

{"created": "2025-07-12T23:06:33.428967+00:00", "updated": "2025-07-12T23:06:33.429035+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}