CVE-2022-49167

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Turns out the compression path will complete\nthe bio we use if we set up any of the compression bios and then return\nan error, and then btrfs_submit_data_bio() will also call bio_endio() on\nthe bio.\n\nFix this by making btrfs_submit_compressed_read() responsible for\ncalling bio_endio() on the bio if there are any errors. Currently it\nwas only doing it if we created the compression bios, otherwise it was\ndepending on btrfs_submit_data_bio() to do the right thing. This\ncreates the above problem, so fix up btrfs_submit_compressed_read() to\nalways call bio_endio() in case of an error, and then simply return from\nbtrfs_submit_data_bio() if we had to call\nbtrfs_submit_compressed_read()."}], "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 bug is in btrfs compressed buffered-read submission (read \u2192 extent_io \u2192 submit_one_bio \u2192 btrfs_submit_data_bio \u2192 btrfs_submit_compressed_read), reachable only via local VFS reads of compressed extents on a mounted btrfs filesystem, not via network protocol handlers.\nAC:L - An attacker who can read compressed files can drive the finish_cb error path (e.g., by inducing ENOMEM in btrfs_lookup_bio_sums/alloc_compressed_bio after pages are allocated); no victim-controlled race or rare non-default config is required.\nPR:L - An unprivileged local user can create compressed files (mount compress= or chattr +c) and read them on an already-mounted btrfs volume; no real root or init-namespace admin capability is required.\nUI:N - Exploitation needs no separate victim action once btrfs is mounted; the attacker triggers the path by reading their own compressed files (and optionally stressing memory).\nS:U - Impact stays within the local kernel/OS security authority (standard kernel memory corruption / DoS); there is no VM escape, IOMMU bypass, or other cross-boundary effect.\nC:H - Double bio_endio after end_bio_extent_readpage's bio_put is a use-after-free of the bio (bioset object), which per UAF guidance enables reclaim and arbitrary read primitives.\nI:H - The same bio UAF/double-free, plus re-entry into page unlock/extent-release paths on already-completed state, is memory corruption that can be leveraged for write primitives and control-flow hijacking.\nA:H - The author observed kernel panics from the double completion; UAF/double bio_put and double page unlock reliably cause oops/panic or equivalent denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/compression.c", "fs/btrfs/inode.c"], "versions": [{"version": "86ccbb4d2a2af4109430df518c995a4f7d14dfd2", "lessThan": "4a4ceb2b990771c374d85d496a1a45255dde48e3", "status": "affected", "versionType": "git"}, {"version": "86ccbb4d2a2af4109430df518c995a4f7d14dfd2", "lessThan": "987b5df1d10355d377315a26e7fb6c72ded83c9f", "status": "affected", "versionType": "git"}, {"version": "86ccbb4d2a2af4109430df518c995a4f7d14dfd2", "lessThan": "f9f15de85d74e7eef021af059ca53a15f041cdd8", "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/btrfs/compression.c", "fs/btrfs/inode.c"], "versions": [{"version": "5.16", "status": "affected"}, {"version": "0", "lessThan": "5.16", "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": "5.16", "versionEndExcluding": "5.16.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "5.17.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "5.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4a4ceb2b990771c374d85d496a1a45255dde48e3"}, {"url": "https://git.kernel.org/stable/c/987b5df1d10355d377315a26e7fb6c72ded83c9f"}, {"url": "https://git.kernel.org/stable/c/f9f15de85d74e7eef021af059ca53a15f041cdd8"}], "title": "btrfs: do not double complete bio on errors during compressed reads", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/btrfs/compression.c", "fs/btrfs/inode.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4a4ceb2b990771c374d85d496a1a45255dde48e3", "status": "affected", "version": "86ccbb4d2a2af4109430df518c995a4f7d14dfd2", "versionType": "git"}, {"lessThan": "987b5df1d10355d377315a26e7fb6c72ded83c9f", "status": "affected", "version": "86ccbb4d2a2af4109430df518c995a4f7d14dfd2", "versionType": "git"}, {"lessThan": "f9f15de85d74e7eef021af059ca53a15f041cdd8", "status": "affected", "version": "86ccbb4d2a2af4109430df518c995a4f7d14dfd2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/btrfs/compression.c", "fs/btrfs/inode.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.16"}, {"lessThan": "5.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.16.*", "status": "unaffected", "version": "5.16.19", "versionType": "semver"}, {"lessThanOrEqual": "5.17.*", "status": "unaffected", "version": "5.17.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.18", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "20C43679-0439-405A-B97F-685BEE50613B", "versionEndExcluding": "5.16.19", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "210C679C-CF84-44A3-8939-E629C87E54BF", "versionEndExcluding": "5.17.2", "versionStartIncluding": "5.17", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not double complete bio on errors during compressed reads\n\nI hit some weird panics while fixing up the error handling from\nbtrfs_lookup_bio_sums(). Turns out the compression path will complete\nthe bio we use if we set up any of the compression bios and then return\nan error, and then btrfs_submit_data_bio() will also call bio_endio() on\nthe bio.\n\nFix this by making btrfs_submit_compressed_read() responsible for\ncalling bio_endio() on the bio if there are any errors. Currently it\nwas only doing it if we created the compression bios, otherwise it was\ndepending on btrfs_submit_data_bio() to do the right thing. This\ncreates the above problem, so fix up btrfs_submit_compressed_read() to\nalways call bio_endio() in case of an error, and then simply return from\nbtrfs_submit_data_bio() if we had to call\nbtrfs_submit_compressed_read()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: no completar dos veces la biograf\u00eda en caso de errores durante lecturas comprimidas Me encontr\u00e9 con algunos p\u00e1nicos extra\u00f1os mientras arreglaba la gesti\u00f3n de errores de btrfs_lookup_bio_sums(). Resulta que la ruta de compresi\u00f3n completar\u00e1 la biograf\u00eda que usamos si configuramos alguna de las biograf\u00edas de compresi\u00f3n y luego devolvemos un error, y luego btrfs_submit_data_bio() tambi\u00e9n llamar\u00e1 a bio_endio() en la biograf\u00eda. Arregle esto haciendo que btrfs_submit_compressed_read() sea responsable de llamar a bio_endio() en la biograf\u00eda si hay alg\u00fan error. Actualmente solo lo hac\u00eda si cre\u00e1bamos la biograf\u00eda de compresi\u00f3n, de lo contrario depend\u00eda de btrfs_submit_data_bio() para hacer lo correcto. Esto crea el problema mencionado anteriormente, as\u00ed que corrija btrfs_submit_compressed_read() para que siempre llame a bio_endio() en caso de error, y luego simplemente regrese de btrfs_submit_data_bio() si tuvi\u00e9ramos que llamar a btrfs_submit_compressed_read()."}], "id": "CVE-2022-49167", "lastModified": "2026-08-04T10:17:37.303", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-02-26T07:00:53.837", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4a4ceb2b990771c374d85d496a1a45255dde48e3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/987b5df1d10355d377315a26e7fb6c72ded83c9f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f9f15de85d74e7eef021af059ca53a15f041cdd8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: btrfs: do not double complete bio on errors during compressed reads", "id": "2347664", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347664"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbtrfs: do not double complete bio on errors during compressed reads\nI hit some weird panics while fixing up the error handling from\nbtrfs_lookup_bio_sums(). Turns out the compression path will complete\nthe bio we use if we set up any of the compression bios and then return\nan error, and then btrfs_submit_data_bio() will also call bio_endio() on\nthe bio.\nFix this by making btrfs_submit_compressed_read() responsible for\ncalling bio_endio() on the bio if there are any errors. Currently it\nwas only doing it if we created the compression bios, otherwise it was\ndepending on btrfs_submit_data_bio() to do the right thing. This\ncreates the above problem, so fix up btrfs_submit_compressed_read() to\nalways call bio_endio() in case of an error, and then simply return from\nbtrfs_submit_data_bio() if we had to call\nbtrfs_submit_compressed_read()."], "name": "CVE-2022-49167", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49167\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49167\nhttps://lore.kernel.org/linux-cve-announce/2025022612-CVE-2022-49167-d747@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-12T22:16:24.415808+00:00", "updated": "2025-07-12T22:16:24.415899+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}