335 lines
19 KiB
JSON
335 lines
19 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-2024-47742",
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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": "2024-09-30T16:00:12.959Z",
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"datePublished": "2024-10-21T12:14:10.499Z",
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"dateUpdated": "2026-08-05T11:39:52.866Z"
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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": "2026-08-05T11:39:52.866Z"
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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\nfirmware_loader: Block path traversal\n\nMost firmware names are hardcoded strings, or are constructed from fairly\nconstrained format strings where the dynamic parts are just some hex\nnumbers or such.\n\nHowever, there are a couple codepaths in the kernel where firmware file\nnames contain string components that are passed through from a device or\nsemi-privileged userspace; the ones I could find (not counting interfaces\nthat require root privileges) are:\n\n - lpfc_sli4_request_firmware_update() seems to construct the firmware\n filename from \"ModelName\", a string that was previously parsed out of\n some descriptor (\"Vital Product Data\") in lpfc_fill_vpd()\n - nfp_net_fw_find() seems to construct a firmware filename from a model\n name coming from nfp_hwinfo_lookup(pf->hwinfo, \"nffw.partno\"), which I\n think parses some descriptor that was read from the device.\n (But this case likely isn't exploitable because the format string looks\n like \"netronome/nic_%s\", and there shouldn't be any *folders* starting\n with \"netronome/nic_\". The previous case was different because there,\n the \"%s\" is *at the start* of the format string.)\n - module_flash_fw_schedule() is reachable from the\n ETHTOOL_MSG_MODULE_FW_FLASH_ACT netlink command, which is marked as\n GENL_UNS_ADMIN_PERM (meaning CAP_NET_ADMIN inside a user namespace is\n enough to pass the privilege check), and takes a userspace-provided\n firmware name.\n (But I think to reach this case, you need to have CAP_NET_ADMIN over a\n network namespace that a special kind of ethernet device is mapped into,\n so I think this is not a viable attack path in practice.)\n\nFix it by rejecting any firmware names containing \"..\" path components.\n\nFor what it's worth, I went looking and haven't found any USB device\ndrivers that use the firmware loader dangerously."
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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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - The most viable attacker-triggerable path is the local ETHTOOL_MSG_MODULE_FW_FLASH_ACT generic-netlink command, which passes a fully attacker-controlled filename string into request_firmware_direct(); the device-side paths (lpfc VPD, nfp hwinfo) would only be Physical, so Local is the higher-severity reachable vector.\nAC:L - There is no race, no memory-layout dependency, and no probabilistic element — the attacker supplies the \"..\" path directly and traversal succeeds deterministically on the first attempt.\nPR:L - The ethtool op is marked GENL_UNS_ADMIN_PERM, meaning CAP_NET_ADMIN inside a user namespace satisfies the check, which per kernel scoring practice is an unprivileged local user; the alternative lpfc path needs no host credentials at all, only a device supplying a malicious VPD ModelName string.\nUI:N - The attacker sends the netlink request itself and the firmware load happens synchronously in that syscall; no victim action is required (and on the lpfc path the load fires automatically from the driver's probe/init routine).\nS:U - The vulnerable component and the impacted resources are both the host kernel and its filesystem — there is no VM, hypervisor, or IOMMU boundary crossed, so this is standard in-kernel impact.\nC:H - _request_firmware() reads the target with kernel credentials (override_creds(prepare_kernel_cred(&init_task))) resolved against init's mount namespace, so traversal yields an arbitrary root-privileged read of any file on the host (/etc/shadow, TLS/SSH private keys), and the contents are then shipped into device flash where an attacker controlling the HBA or transceiver can retrieve them.\nI:H - The traversal breaks the firmware loader's guarantee that images come only from root-owned /lib/firmware, letting the attacker redirect the load to a file they wrote themselves and have that unvalidated content flashed into device firmware (lpfc_wr_object / CMIS module update) as well as parsed by driver firmware-parsing code that trusts its input.\nA:H - Writing non-firmware or attacker-authored content into an HBA's or optical module's flash can permanently brick the adapter, driver firmware parsers readily oops on arbitrary non-firmware data, and kernel_read_file() vmalloc()s the entire target file (up to INT_MAX) so pointing at a multi-gigabyte file drives the machine into memory exhaustion."
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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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"drivers/base/firmware_loader/main.c"
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],
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"versions": [
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{
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"version": "abb139e75c2cdbb955e840d6331cb5863e409d0e",
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"lessThan": "d1768e5535d3ded59f888637016e6f821f4e069f",
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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": "abb139e75c2cdbb955e840d6331cb5863e409d0e",
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"lessThan": "9b1ca33ebd05b3acef5b976c04e5e791af93ce1b",
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"status": "affected",
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},
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{
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"version": "abb139e75c2cdbb955e840d6331cb5863e409d0e",
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"lessThan": "c30558e6c5c9ad6c86459d9acce1520ceeab9ea6",
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"status": "affected",
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},
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{
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"version": "abb139e75c2cdbb955e840d6331cb5863e409d0e",
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"lessThan": "a77fc4acfd49fc6076e565445b2bc5fdc3244da4",
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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": "abb139e75c2cdbb955e840d6331cb5863e409d0e",
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"lessThan": "3d2411f4edcb649eaf232160db459bb4770b5251",
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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": "abb139e75c2cdbb955e840d6331cb5863e409d0e",
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"lessThan": "7420c1bf7fc784e587b87329cc6dfa3dca537aa4",
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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": "abb139e75c2cdbb955e840d6331cb5863e409d0e",
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"lessThan": "28f1cd94d3f1092728fb775a0fe26c5f1ac2ebeb",
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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": "abb139e75c2cdbb955e840d6331cb5863e409d0e",
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"lessThan": "6c4e13fdfcab34811c3143a0a03c05fec4e870ec",
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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": "abb139e75c2cdbb955e840d6331cb5863e409d0e",
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"lessThan": "f0e5311aa8022107d63c54e2f03684ec097d1394",
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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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"drivers/base/firmware_loader/main.c"
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],
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"versions": [
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{
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"version": "3.7",
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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": "3.7",
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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": "4.19.323",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.285",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.227",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.168",
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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": "6.1.113",
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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": "6.6.54",
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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": "6.10.13",
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"lessThanOrEqual": "6.10.*",
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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": "6.11.2",
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"lessThanOrEqual": "6.11.*",
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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": "6.12",
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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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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"url": "https://git.kernel.org/stable/c/d1768e5535d3ded59f888637016e6f821f4e069f"
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{
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"url": "https://git.kernel.org/stable/c/9b1ca33ebd05b3acef5b976c04e5e791af93ce1b"
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{
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"url": "https://git.kernel.org/stable/c/c30558e6c5c9ad6c86459d9acce1520ceeab9ea6"
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},
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{
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"url": "https://git.kernel.org/stable/c/a77fc4acfd49fc6076e565445b2bc5fdc3244da4"
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},
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{
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"url": "https://git.kernel.org/stable/c/3d2411f4edcb649eaf232160db459bb4770b5251"
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},
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{
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"url": "https://git.kernel.org/stable/c/7420c1bf7fc784e587b87329cc6dfa3dca537aa4"
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},
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{
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"url": "https://git.kernel.org/stable/c/28f1cd94d3f1092728fb775a0fe26c5f1ac2ebeb"
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},
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{
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"url": "https://git.kernel.org/stable/c/6c4e13fdfcab34811c3143a0a03c05fec4e870ec"
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},
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{
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"url": "https://git.kernel.org/stable/c/f0e5311aa8022107d63c54e2f03684ec097d1394"
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}
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],
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"title": "firmware_loader: Block path traversal",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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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-2024-47742",
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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": "no"
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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": "2024-10-21T12:59:04.060717Z"
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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": "2024-10-21T13:04:14.368Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T22:21:38.407Z"
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}
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}
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]
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}
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} |