145 lines
7.8 KiB
JSON
145 lines
7.8 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-2026-31445",
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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": "2026-03-09T15:48:24.090Z",
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"datePublished": "2026-04-22T13:53:42.090Z",
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"dateUpdated": "2026-05-11T22:08:50.744Z"
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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": "2026-05-11T22:08:50.744Z"
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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: avoid use of half-online-committed context\n\nOne major usage of damon_call() is online DAMON parameters update. It is\ndone by calling damon_commit_ctx() inside the damon_call() callback\nfunction. damon_commit_ctx() can fail for two reasons: 1) invalid\nparameters and 2) internal memory allocation failures. In case of\nfailures, the damon_ctx that attempted to be updated (commit destination)\ncan be partially updated (or, corrupted from a perspective), and therefore\nshouldn't be used anymore. The function only ensures the damon_ctx object\ncan safely deallocated using damon_destroy_ctx().\n\nThe API callers are, however, calling damon_commit_ctx() only after\nasserting the parameters are valid, to avoid damon_commit_ctx() fails due\nto invalid input parameters. But it can still theoretically fail if the\ninternal memory allocation fails. In the case, DAMON may run with the\npartially updated damon_ctx. This can result in unexpected behaviors\nincluding even NULL pointer dereference in case of damos_commit_dests()\nfailure [1]. Such allocation failure is arguably too small to fail, so\nthe real world impact would be rare. But, given the bad consequence, this\nneeds to be fixed.\n\nAvoid such partially-committed (maybe-corrupted) damon_ctx use by saving\nthe damon_commit_ctx() failure on the damon_ctx object. For this,\nintroduce damon_ctx->maybe_corrupted field. damon_commit_ctx() sets it\nwhen it is failed. kdamond_call() checks if the field is set after each\ndamon_call_control->fn() is executed. If it is set, ignore remaining\ncallback requests and return. All kdamond_call() callers including\nkdamond_fn() also check the maybe_corrupted field right after\nkdamond_call() invocations. If the field is set, break the kdamond_fn()\nmain loop so that DAMON sill doesn't use the context that might be\ncorrupted.\n\n[sj@kernel.org: let kdamond_call() with cancel regardless of maybe_corrupted]"
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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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"include/linux/damon.h",
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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": "3301f1861d34f53911a30a8f5f41b9141bd8ed39",
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"lessThan": "9c495f9d3781cd692bd199531cabd4627155e8cd",
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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": "3301f1861d34f53911a30a8f5f41b9141bd8ed39",
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"lessThan": "1b247cd0654a3a306996fa80741d79296c683a56",
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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": "3301f1861d34f53911a30a8f5f41b9141bd8ed39",
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"lessThan": "26f775a054c3cda86ad465a64141894a90a9e145",
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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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"include/linux/damon.h",
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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": "6.15",
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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": "6.15",
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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": "6.18.21",
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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": "6.19.11",
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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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{
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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": "6.15",
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"versionEndExcluding": "6.18.21"
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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": "6.15",
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"versionEndExcluding": "6.19.11"
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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": "6.15",
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"versionEndExcluding": "7.0"
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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/9c495f9d3781cd692bd199531cabd4627155e8cd"
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},
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{
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"url": "https://git.kernel.org/stable/c/1b247cd0654a3a306996fa80741d79296c683a56"
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},
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{
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"url": "https://git.kernel.org/stable/c/26f775a054c3cda86ad465a64141894a90a9e145"
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}
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],
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"title": "mm/damon/core: avoid use of half-online-committed context",
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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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} |