{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46020", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.092Z", "datePublished": "2026-05-27T12:56:21.920Z", "dateUpdated": "2026-05-27T12:56:21.920Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:56:21.920Z"}, "descriptions": [{"lang": "en", "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/damon/core.c"], "versions": [{"version": "0e1c773b501f33437d87b72c7d26080361e224b1", "lessThan": "b09958e235f2b9cd3898b85a8529172afa80d212", "status": "affected", "versionType": "git"}, {"version": "0e1c773b501f33437d87b72c7d26080361e224b1", "lessThan": "bcad74078708f2330a45b55358ebc38f8f4b1127", "status": "affected", "versionType": "git"}, {"version": "0e1c773b501f33437d87b72c7d26080361e224b1", "lessThan": "40250b2dded0604a112be605f3828700d80ad7c2", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/damon/core.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc1", "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": "6.16", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b09958e235f2b9cd3898b85a8529172afa80d212"}, {"url": "https://git.kernel.org/stable/c/bcad74078708f2330a45b55358ebc38f8f4b1127"}, {"url": "https://git.kernel.org/stable/c/40250b2dded0604a112be605f3828700d80ad7c2"}], "title": "mm/damon/core: validate damos_quota_goal->nid for node_mem_{used,free}_bp", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-46020", "lastModified": "2026-05-27T14:48:03.013", "metrics": {}, "published": "2026-05-27T14:17:20.460", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/40250b2dded0604a112be605f3828700d80ad7c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b09958e235f2b9cd3898b85a8529172afa80d212"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bcad74078708f2330a45b55358ebc38f8f4b1127"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{}