286 lines
13 KiB
JSON
286 lines
13 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-2021-46935",
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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": "2024-02-25T13:45:52.720Z",
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"datePublished": "2024-02-27T09:44:02.071Z",
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"dateUpdated": "2026-05-11T13:44:45.123Z"
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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": "2026-05-11T13:44:45.123Z"
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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\nbinder: fix async_free_space accounting for empty parcels\n\nIn 4.13, commit 74310e06be4d (\"android: binder: Move buffer out of area shared with user space\")\nfixed a kernel structure visibility issue. As part of that patch,\nsizeof(void *) was used as the buffer size for 0-length data payloads so\nthe driver could detect abusive clients sending 0-length asynchronous\ntransactions to a server by enforcing limits on async_free_size.\n\nUnfortunately, on the \"free\" side, the accounting of async_free_space\ndid not add the sizeof(void *) back. The result was that up to 8-bytes of\nasync_free_space were leaked on every async transaction of 8-bytes or\nless. These small transactions are uncommon, so this accounting issue\nhas gone undetected for several years.\n\nThe fix is to use \"buffer_size\" (the allocated buffer size) instead of\n\"size\" (the logical buffer size) when updating the async_free_space\nduring the free operation. These are the same except for this\ncorner case of asynchronous transactions with payloads < 8 bytes."
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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/android/binder_alloc.c"
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],
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"versions": [
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{
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"version": "74310e06be4d74dcf67cd108366710dee5c576d5",
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"lessThan": "2d2df539d05205fd83c404d5f2dff48d36f9b495",
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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": "74310e06be4d74dcf67cd108366710dee5c576d5",
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"lessThan": "7c7064402609aeb6fb11be1b4ec10673ff17b593",
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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": "74310e06be4d74dcf67cd108366710dee5c576d5",
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"lessThan": "103b16a8c51f96d5fe063022869ea906c256e5da",
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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": "74310e06be4d74dcf67cd108366710dee5c576d5",
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"lessThan": "1cb8444f3114f0bb2f6e3bcadcf09aa4a28425d4",
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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": "74310e06be4d74dcf67cd108366710dee5c576d5",
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"lessThan": "17691bada6b2f1d5f1c0f6d28cd9d0727023b0ff",
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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": "74310e06be4d74dcf67cd108366710dee5c576d5",
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"lessThan": "cfd0d84ba28c18b531648c9d4a35ecca89ad9901",
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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/android/binder_alloc.c"
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],
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"versions": [
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{
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"version": "4.14",
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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": "4.14",
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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": "4.14.261",
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"lessThanOrEqual": "4.14.*",
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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": "4.19.224",
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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": "5.4.170",
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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": "5.10.90",
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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": "5.15.13",
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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": "5.16",
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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": "4.14",
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"versionEndExcluding": "4.14.261"
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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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"versionEndExcluding": "4.19.224"
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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/2d2df539d05205fd83c404d5f2dff48d36f9b495"
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},
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{
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"url": "https://git.kernel.org/stable/c/7c7064402609aeb6fb11be1b4ec10673ff17b593"
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},
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{
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"url": "https://git.kernel.org/stable/c/103b16a8c51f96d5fe063022869ea906c256e5da"
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},
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{
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"url": "https://git.kernel.org/stable/c/1cb8444f3114f0bb2f6e3bcadcf09aa4a28425d4"
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},
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{
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"url": "https://git.kernel.org/stable/c/17691bada6b2f1d5f1c0f6d28cd9d0727023b0ff"
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},
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{
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"url": "https://git.kernel.org/stable/c/cfd0d84ba28c18b531648c9d4a35ecca89ad9901"
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}
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],
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"title": "binder: fix async_free_space accounting for empty parcels",
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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-2021-46935",
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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": "2024-02-27T20:52:57.585284Z"
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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": "2024-07-05T17:22:03.611Z"
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}
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},
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{
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"shortName": "CVE",
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"dateUpdated": "2024-08-04T05:17:43.010Z"
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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://git.kernel.org/stable/c/2d2df539d05205fd83c404d5f2dff48d36f9b495",
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} |