{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68158", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.371Z", "datePublished": "2026-08-10T11:59:24.675Z", "dateUpdated": "2026-08-13T22:41:01.029Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-13T22:41:01.029Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix multiplication overflow in decode_new_up_state_weight()\n\nIf a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted\nosdmap, out-of-bounds memory accesses may occur in\ndecode_new_up_state_weight(). This happens because the bounds check for\nthe new_state part is based on calculating its length depending on a len\nvalue read from the incoming message. This calculation may overflow\nleading to an incorrect bounds check. Subsequently, out-of-bounds reads\nmay occur when decoding this part.\n\nThis patch switches the multiplication to use check_mul_overflow() to\nabort processing the osdmap if an overflow occurred. Therefore,\nosdmaps/messages containing large values for len that result in a\nmultiplication overflow are treated as invalid.\n\n[ idryomov: rename new_state_len -> new_state_item_size, formatting ]"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - Malformed incremental osdmap data is delivered in CEPH_MSG_OSD_MAP over TCP from a Ceph monitor (mon_dispatch) or OSD (osd_dispatch) to libceph clients (CephFS/RBD), and the overflow is triggered while decoding received network bytes in osdmap_apply_incremental().\nAC:L - A compromised or attacker-controlled monitor/OSD can publish an incremental osdmap with epoch N+1 and a crafted new_state length that wraps the multiply, reliably bypassing bounds checks without races or victim-specific memory layout.\nPR:N - Exploitation requires no privileges on the victim host; a malicious cluster peer or on-path attacker that can deliver forged osdmaps to an already-connected kernel Ceph client needs no local account, capabilities, or user-namespace tricks.\nUI:N - Once a host is a Ceph client, osdmap subscriptions and updates are applied automatically by the kernel; no additional mount, open, or interactive step is needed at exploit time beyond the existing client session.\nS:U - Impact is confined to kernel memory and libceph client state on the Ceph client host (info leak, map corruption, crash, or privilege escalation); it does not cross VM, IOMMU, or sandbox boundaries to another security authority.\nC:H - Integer-overflow bypass lets decode_new_up_state_weight() run bare ceph_decode_32/8 loops past the message end, performing out-of-bounds reads of adjacent kernel heap/slack memory that can disclose pointers and other sensitive data.\nI:H - Misaligned decoding also drives attacker-controlled osd/xorstate/weight values into map->osd_weight[], map->osd_state[], and map->osd_addr[] updates (including memset), corrupting kernel osdmap state in ways usable for further exploitation.\nA:H - Unbounded out-of-bounds reads while parsing osdmaps can fault on unmapped pages and trigger kernel oops/panic; map corruption can also cause persistent client failure, repeatable on each malicious incremental map."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ceph/osdmap.c"], "versions": [{"version": "930c532869774ebf8af9efe9484c597f896a7d46", "lessThan": "05c90e059269f087becfcce23348496085835c29", "status": "affected", "versionType": "git"}, {"version": "930c532869774ebf8af9efe9484c597f896a7d46", "lessThan": "143ba49ead77ec483c0326f8aaad8649874e99c4", "status": "affected", "versionType": "git"}, {"version": "930c532869774ebf8af9efe9484c597f896a7d46", "lessThan": "1732d89dfcd74f6fde9ce70900d316c4a151c153", "status": "affected", "versionType": "git"}, {"version": "930c532869774ebf8af9efe9484c597f896a7d46", "lessThan": "bee4b5b53e7bff0467fd916cc44c9b190733c6bd", "status": "affected", "versionType": "git"}, {"version": "930c532869774ebf8af9efe9484c597f896a7d46", "lessThan": "98917a499ec7064c14fc56d180a4fd636fc2784c", "status": "affected", "versionType": "git"}, {"version": "1196c36fd53c3b1615eb02f986cb727b1dfc1047", "status": "affected", "versionType": "git"}, {"version": "bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196", "status": "affected", "versionType": "git"}, {"version": "6b96b2d473701b45df3fea8dd9796b6ec39e6d54", "status": "affected", "versionType": "git"}, {"version": "7405d73cea0d0e6c541f5c534078feeb46188844", "status": "affected", "versionType": "git"}, {"version": "8777c9f654637d56f4c4ca54eb1bc7c609b70085", "status": "affected", "versionType": "git"}, {"version": "6831c98ce0b8a3e88db64aa224372effd0dcc694", "status": "affected", "versionType": "git"}, {"version": "032951d32c13b7564dfba82758260cb7aa1149d2", "status": "affected", "versionType": "git"}, {"version": "14877928f10667a5606383885d004f7185f33718", "status": "affected", "versionType": "git"}, {"version": "3.10.103", "lessThan": "3.11", "status": "affected", "versionType": "semver"}, {"version": "3.12.63", "lessThan": "3.13", "status": "affected", "versionType": "semver"}, {"version": "3.14.75", "lessThan": "3.15", "status": "affected", "versionType": "semver"}, {"version": "3.16.39", "lessThan": "3.17", "status": "affected", "versionType": "semver"}, {"version": "3.18.39", "lessThan": "3.19", "status": "affected", "versionType": "semver"}, {"version": "4.1.30", "lessThan": "4.2", "status": "affected", "versionType": "semver"}, {"version": "4.4.17", "lessThan": "4.5", "status": "affected", "versionType": "semver"}, {"version": "4.6.6", "lessThan": "4.7", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ceph/osdmap.c"], "versions": [{"version": "4.7", "status": "affected"}, {"version": "0", "lessThan": "4.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc5", "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": "4.7", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.2-rc5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12.63"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29"}, {"url": "https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4"}, {"url": "https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153"}, {"url": "https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd"}, {"url": "https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c"}], "title": "libceph: Fix multiplication overflow in decode_new_up_state_weight()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ceph/osdmap.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "05c90e059269f087becfcce23348496085835c29", "status": "affected", "version": "930c532869774ebf8af9efe9484c597f896a7d46", "versionType": "git"}, {"lessThan": "143ba49ead77ec483c0326f8aaad8649874e99c4", "status": "affected", "version": "930c532869774ebf8af9efe9484c597f896a7d46", "versionType": "git"}, {"lessThan": "1732d89dfcd74f6fde9ce70900d316c4a151c153", "status": "affected", "version": "930c532869774ebf8af9efe9484c597f896a7d46", "versionType": "git"}, {"lessThan": "bee4b5b53e7bff0467fd916cc44c9b190733c6bd", "status": "affected", "version": "930c532869774ebf8af9efe9484c597f896a7d46", "versionType": "git"}, {"lessThan": "98917a499ec7064c14fc56d180a4fd636fc2784c", "status": "affected", "version": "930c532869774ebf8af9efe9484c597f896a7d46", "versionType": "git"}, {"status": "affected", "version": "1196c36fd53c3b1615eb02f986cb727b1dfc1047", "versionType": "git"}, {"status": "affected", "version": "bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196", "versionType": "git"}, {"status": "affected", "version": "6b96b2d473701b45df3fea8dd9796b6ec39e6d54", "versionType": "git"}, {"status": "affected", "version": "7405d73cea0d0e6c541f5c534078feeb46188844", "versionType": "git"}, {"status": "affected", "version": "8777c9f654637d56f4c4ca54eb1bc7c609b70085", "versionType": "git"}, {"status": "affected", "version": "6831c98ce0b8a3e88db64aa224372effd0dcc694", "versionType": "git"}, {"status": "affected", "version": "032951d32c13b7564dfba82758260cb7aa1149d2", "versionType": "git"}, {"status": "affected", "version": "14877928f10667a5606383885d004f7185f33718", "versionType": "git"}, {"lessThan": "3.11", "status": "affected", "version": "3.10.103", "versionType": "semver"}, {"lessThan": "3.13", "status": "affected", "version": "3.12.63", "versionType": "semver"}, {"lessThan": "3.15", "status": "affected", "version": "3.14.75", "versionType": "semver"}, {"lessThan": "3.17", "status": "affected", "version": "3.16.39", "versionType": "semver"}, {"lessThan": "3.19", "status": "affected", "version": "3.18.39", "versionType": "semver"}, {"lessThan": "4.2", "status": "affected", "version": "4.1.30", "versionType": "semver"}, {"lessThan": "4.5", "status": "affected", "version": "4.4.17", "versionType": "semver"}, {"lessThan": "4.7", "status": "affected", "version": "4.6.6", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ceph/osdmap.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.7"}, {"lessThan": "4.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.148", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.101", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.42", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc5", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix multiplication overflow in decode_new_up_state_weight()\n\nIf a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted\nosdmap, out-of-bounds memory accesses may occur in\ndecode_new_up_state_weight(). This happens because the bounds check for\nthe new_state part is based on calculating its length depending on a len\nvalue read from the incoming message. This calculation may overflow\nleading to an incorrect bounds check. Subsequently, out-of-bounds reads\nmay occur when decoding this part.\n\nThis patch switches the multiplication to use check_mul_overflow() to\nabort processing the osdmap if an overflow occurred. Therefore,\nosdmaps/messages containing large values for len that result in a\nmultiplication overflow are treated as invalid.\n\n[ idryomov: rename new_state_len -> new_state_item_size, formatting ]"}], "id": "CVE-2026-68158", "lastModified": "2026-08-13T23:17:21.370", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-10T13:20:02.033", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: libceph: Fix multiplication overflow in decode_new_up_state_weight()", "id": "2513428", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513428"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nlibceph: Fix multiplication overflow in decode_new_up_state_weight()\nIf a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted\nosdmap, out-of-bounds memory accesses may occur in\ndecode_new_up_state_weight(). This happens because the bounds check for\nthe new_state part is based on calculating its length depending on a len\nvalue read from the incoming message. This calculation may overflow\nleading to an incorrect bounds check. Subsequently, out-of-bounds reads\nmay occur when decoding this part.\nThis patch switches the multiplication to use check_mul_overflow() to\nabort processing the osdmap if an overflow occurred. Therefore,\nosdmaps/messages containing large values for len that result in a\nmultiplication overflow are treated as invalid.\n[ idryomov: rename new_state_len -> new_state_item_size, formatting ]", "A flaw was found in `libceph` within the Linux kernel. A remote attacker could send a maliciously crafted `CEPH_MSG_OSD_MAP` message, leading to a multiplication overflow in the `decode_new_up_state_weight()` function. This overflow causes an incorrect bounds check, which may result in out-of-bounds memory reads. This could potentially lead to information disclosure or system instability."], "name": "CVE-2026-68158", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68158\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68158\nhttps://lore.kernel.org/linux-cve-announce/2026081003-CVE-2026-68158-1af0@gregkh/T"], "threat_severity": "Moderate"}