mirror of
https://github.com/CVEProject/cvelist.git
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146 lines
8.5 KiB
JSON
146 lines
8.5 KiB
JSON
{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"CVE_data_meta": {
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"ID": "CVE-2024-56678",
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"ASSIGNER": "cve@kernel.org",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/mm/fault: Fix kfence page fault reporting\n\ncopy_from_kernel_nofault() can be called when doing read of /proc/kcore.\n/proc/kcore can have some unmapped kfence objects which when read via\ncopy_from_kernel_nofault() can cause page faults. Since *_nofault()\nfunctions define their own fixup table for handling fault, use that\ninstead of asking kfence to handle such faults.\n\nHence we search the exception tables for the nip which generated the\nfault. If there is an entry then we let the fixup table handler handle the\npage fault by returning an error from within ___do_page_fault().\n\nThis can be easily triggered if someone tries to do dd from /proc/kcore.\neg. dd if=/proc/kcore of=/dev/null bs=1M\n\nSome example false negatives:\n\n ===============================\n BUG: KFENCE: invalid read in copy_from_kernel_nofault+0x9c/0x1a0\n Invalid read at 0xc0000000fdff0000:\n copy_from_kernel_nofault+0x9c/0x1a0\n 0xc00000000665f950\n read_kcore_iter+0x57c/0xa04\n proc_reg_read_iter+0xe4/0x16c\n vfs_read+0x320/0x3ec\n ksys_read+0x90/0x154\n system_call_exception+0x120/0x310\n system_call_vectored_common+0x15c/0x2ec\n\n BUG: KFENCE: use-after-free read in copy_from_kernel_nofault+0x9c/0x1a0\n Use-after-free read at 0xc0000000fe050000 (in kfence-#2):\n copy_from_kernel_nofault+0x9c/0x1a0\n 0xc00000000665f950\n read_kcore_iter+0x57c/0xa04\n proc_reg_read_iter+0xe4/0x16c\n vfs_read+0x320/0x3ec\n ksys_read+0x90/0x154\n system_call_exception+0x120/0x310\n system_call_vectored_common+0x15c/0x2ec"
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "Linux",
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"product": {
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"product_data": [
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{
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"product_name": "Linux",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_name": "90cbac0e995dd92f7bcf82f74aa50250bf194a4a",
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"version_value": "e0a470b5733c1fe068d5c58b0bb91ad539604bc6"
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "5.13",
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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": "5.13",
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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": "5.15.174",
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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": "6.1.120",
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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": "6.6.64",
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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": "6.11.11",
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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": "6.12.2",
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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": "6.13-rc1",
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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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"defaultStatus": "affected"
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}
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}
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]
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}
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}
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]
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}
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}
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]
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}
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},
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"references": {
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"reference_data": [
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{
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"url": "https://git.kernel.org/stable/c/e0a470b5733c1fe068d5c58b0bb91ad539604bc6",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/e0a470b5733c1fe068d5c58b0bb91ad539604bc6"
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},
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{
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"url": "https://git.kernel.org/stable/c/4d2655754e94741b159aa807b72ea85518a65fd5",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/4d2655754e94741b159aa807b72ea85518a65fd5"
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},
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{
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"url": "https://git.kernel.org/stable/c/9ea8d8bf9b625e8ad3be6b0432aecdc549914121",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/9ea8d8bf9b625e8ad3be6b0432aecdc549914121"
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},
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{
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"url": "https://git.kernel.org/stable/c/7eaeb7a49b6d16640f9f3c9074c05175d74c710b",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/7eaeb7a49b6d16640f9f3c9074c05175d74c710b"
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},
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{
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"url": "https://git.kernel.org/stable/c/15f78d2c3d1452645bd8b9da909b0ca266f83c43",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/15f78d2c3d1452645bd8b9da909b0ca266f83c43"
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},
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{
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"url": "https://git.kernel.org/stable/c/06dbbb4d5f7126b6307ab807cbf04ecfc459b933",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/06dbbb4d5f7126b6307ab807cbf04ecfc459b933"
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}
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]
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},
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"generator": {
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"engine": "bippy-5f407fcff5a0"
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}
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} |