| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "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." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/android/binder_alloc.c" |
| ], |
| "versions": [ |
| { |
| "version": "74310e06be4d74dcf67cd108366710dee5c576d5", |
| "lessThan": "2d2df539d05205fd83c404d5f2dff48d36f9b495", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74310e06be4d74dcf67cd108366710dee5c576d5", |
| "lessThan": "7c7064402609aeb6fb11be1b4ec10673ff17b593", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74310e06be4d74dcf67cd108366710dee5c576d5", |
| "lessThan": "103b16a8c51f96d5fe063022869ea906c256e5da", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74310e06be4d74dcf67cd108366710dee5c576d5", |
| "lessThan": "1cb8444f3114f0bb2f6e3bcadcf09aa4a28425d4", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74310e06be4d74dcf67cd108366710dee5c576d5", |
| "lessThan": "17691bada6b2f1d5f1c0f6d28cd9d0727023b0ff", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74310e06be4d74dcf67cd108366710dee5c576d5", |
| "lessThan": "cfd0d84ba28c18b531648c9d4a35ecca89ad9901", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/android/binder_alloc.c" |
| ], |
| "versions": [ |
| { |
| "version": "4.14", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "4.14", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.14.261", |
| "lessThanOrEqual": "4.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.224", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.170", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.90", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.13", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.16", |
| "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": "4.14", |
| "versionEndExcluding": "4.14.261" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.14", |
| "versionEndExcluding": "4.19.224" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.14", |
| "versionEndExcluding": "5.4.170" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.14", |
| "versionEndExcluding": "5.10.90" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.14", |
| "versionEndExcluding": "5.15.13" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.14", |
| "versionEndExcluding": "5.16" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/2d2df539d05205fd83c404d5f2dff48d36f9b495" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/7c7064402609aeb6fb11be1b4ec10673ff17b593" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/103b16a8c51f96d5fe063022869ea906c256e5da" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/1cb8444f3114f0bb2f6e3bcadcf09aa4a28425d4" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/17691bada6b2f1d5f1c0f6d28cd9d0727023b0ff" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/cfd0d84ba28c18b531648c9d4a35ecca89ad9901" |
| } |
| ], |
| "title": "binder: fix async_free_space accounting for empty parcels", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-46935", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
