289 lines
15 KiB
JSON
289 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-43405",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-05-01T14:12:56.007Z",
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"datePublished": "2026-05-08T14:21:45.581Z",
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"dateUpdated": "2026-10-19T19:16:28.480Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:27:48.288Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Use u32 for non-negative values in ceph_monmap_decode()\n\nThis patch fixes unnecessary implicit conversions that change signedness\nof blob_len and num_mon in ceph_monmap_decode().\nCurrently blob_len and num_mon are (signed) int variables. They are used\nto hold values that are always non-negative and get assigned in\nceph_decode_32_safe(), which is meant to assign u32 values. Both\nvariables are subsequently used as unsigned values, and the value of\nnum_mon is further assigned to monmap->num_mon, which is of type u32.\nTherefore, both variables should be of type u32. This is especially\nrelevant for num_mon. If the value read from the incoming message is\nvery large, it is interpreted as a negative value, and the check for\nnum_mon > CEPH_MAX_MON does not catch it. This leads to the attempt to\nallocate a very large chunk of memory for monmap, which will most likely\nfail. In this case, an unnecessary attempt to allocate memory is\nperformed, and -ENOMEM is returned instead of -EINVAL."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The vulnerable decoder processes CEPH_MSG_MON_MAP data received over the Ceph monitor TCP connection from a remote peer.\nAC:L - Triggering requires sending a single malformed monmap with a large u32 num_mon value; there is no race or condition outside the attacker's control once they control the monitor-side message stream.\nPR:N - The attacker needs no privileges on the vulnerable host; a malicious or compromised Ceph monitor endpoint can supply the crafted network message.\nUI:N - Although Ceph clients are initially created by mount or RBD setup, monitor map updates are received asynchronously over an established session and do not require further victim action.\nS:U - The impact remains within the kernel/Ceph client security authority and does not cross a VM, sandbox, or hardware isolation boundary.\nC:N - The signedness bug causes an oversized allocation attempt that fails; the investigated path does not expose kernel memory or create a read primitive.\nI:N - The allocation is overflow-safe and fails before the monmap is installed or populated, so there is no demonstrated memory corruption or data modification primitive.\nA:H - A crafted monmap can repeatedly force huge kernel allocation attempts and prevent the client from obtaining or refreshing a valid monitor map, denying Ceph storage availability in affected deployments."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ceph/mon_client.c"
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],
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"versions": [
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{
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"version": "a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c",
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"lessThan": "ee5588e2bc41acb73f6676c0520420c107cd0140",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c",
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"lessThan": "86f7060cd638d6eb042e8ed780fb83a59ca0dcb3",
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"status": "affected",
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"versionType": "git"
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},
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"lessThan": "5f2806684b05bd24d05c091083b8e2517ba8ffac",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c",
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"lessThan": "b268984ae88cb0dcd7a8e8263962c748448e26e8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c",
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"lessThan": "ba0a4df8c563536857dcbf7b4dbd0f2a15f57ace",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c",
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"lessThan": "08bc6173fd611ad5a40f472bf5f15b92aea0fe40",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c",
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"lessThan": "770444611f047dbfd4517ec0bc1b179d40c2f346",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ceph/mon_client.c"
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],
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"versions": [
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{
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"version": "5.11",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.11",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.203",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.167",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.130",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.78",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.19",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.19.9",
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"lessThanOrEqual": "6.19.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.11",
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"versionEndExcluding": "5.15.203"
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"vulnerable": true,
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ee5588e2bc41acb73f6676c0520420c107cd0140"
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{
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"url": "https://git.kernel.org/stable/c/86f7060cd638d6eb042e8ed780fb83a59ca0dcb3"
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"url": "https://git.kernel.org/stable/c/5f2806684b05bd24d05c091083b8e2517ba8ffac"
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},
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{
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"url": "https://git.kernel.org/stable/c/b268984ae88cb0dcd7a8e8263962c748448e26e8"
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},
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{
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"url": "https://git.kernel.org/stable/c/ba0a4df8c563536857dcbf7b4dbd0f2a15f57ace"
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},
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{
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"url": "https://git.kernel.org/stable/c/08bc6173fd611ad5a40f472bf5f15b92aea0fe40"
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{
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"url": "https://git.kernel.org/stable/c/770444611f047dbfd4517ec0bc1b179d40c2f346"
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}
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],
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"title": "libceph: Use u32 for non-negative values in ceph_monmap_decode()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-43405",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:17:06.278684Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-190",
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"description": "CWE-190 Integer Overflow or Wraparound"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T19:16:28.480Z"
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}
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}
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]
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}
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} |