143 lines
7.2 KiB
JSON
143 lines
7.2 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-2026-46020",
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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": "2026-05-13T15:03:33.092Z",
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"datePublished": "2026-05-27T12:56:21.920Z",
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"dateUpdated": "2026-06-14T17:48:26.041Z"
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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": "2026-06-14T17:48:26.041Z"
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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\nmm/damon/core: validate damos_quota_goal->nid for node_mem_{used,free}_bp\n\nPatch series \"mm/damon/core: validate damos_quota_goal->nid\".\n\nnode_mem[cg]_{used,free}_bp DAMOS quota goals receive the node id. The\nnode id is used for si_meminfo_node() and NODE_DATA() without proper\nvalidation. As a result, privileged users can trigger an out of bounds\nmemory access using DAMON_SYSFS. Fix the issues.\n\nThe issue was originally reported [1] with a fix by another author. The\noriginal author announced [2] that they will stop working including the\nfix that was still in the review stage. Hence I'm restarting this.\n\n\nThis patch (of 2):\n\nUsers can set damos_quota_goal->nid with arbitrary value for\nnode_mem_{used,free}_bp. But DAMON core is using those for\nsi_meminfo_node() without the validation of the value. This can result in\nout of bounds memory access. The issue can actually triggered using DAMON\nuser-space tool (damo), like below.\n\n $ sudo ./damo start --damos_action stat \\\n \t--damos_quota_goal node_mem_used_bp 50% -1 \\\n \t--damos_quota_interval 1s\n $ sudo dmesg\n [...]\n [ 65.565986] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098\n\nFix this issue by adding the validation of the given node. If an invalid\nnode id is given, it returns 0% for used memory ratio, and 100% for free\nmemory ratio."
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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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"mm/damon/core.c"
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],
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"versions": [
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{
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"version": "0e1c773b501f33437d87b72c7d26080361e224b1",
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"lessThan": "b09958e235f2b9cd3898b85a8529172afa80d212",
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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": "0e1c773b501f33437d87b72c7d26080361e224b1",
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"lessThan": "bcad74078708f2330a45b55358ebc38f8f4b1127",
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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": "0e1c773b501f33437d87b72c7d26080361e224b1",
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"lessThan": "40250b2dded0604a112be605f3828700d80ad7c2",
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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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"mm/damon/core.c"
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],
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"versions": [
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{
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"version": "6.16",
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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": "6.16",
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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": "6.18.27",
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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": "7.0.4",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.18.27"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.0.4"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.1"
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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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{
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"url": "https://git.kernel.org/stable/c/b09958e235f2b9cd3898b85a8529172afa80d212"
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},
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{
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"url": "https://git.kernel.org/stable/c/bcad74078708f2330a45b55358ebc38f8f4b1127"
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},
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{
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"url": "https://git.kernel.org/stable/c/40250b2dded0604a112be605f3828700d80ad7c2"
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}
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],
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"title": "mm/damon/core: validate damos_quota_goal->nid for node_mem_{used,free}_bp",
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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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}
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} |