113 lines
6.0 KiB
JSON
113 lines
6.0 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-2025-68299",
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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": "2025-12-16T14:48:05.293Z",
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"datePublished": "2025-12-16T15:06:18.246Z",
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"dateUpdated": "2026-08-03T09:32:28.315Z"
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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": "2026-08-03T09:32:28.315Z"
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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\nafs: Fix delayed allocation of a cell's anonymous key\n\nThe allocation of a cell's anonymous key is done in a background thread\nalong with other cell setup such as doing a DNS upcall. In the reported\nbug, this is triggered by afs_parse_source() parsing the device name given\nto mount() and calling afs_lookup_cell() with the name of the cell.\n\nThe normal key lookup then tries to use the key description on the\nanonymous authentication key as the reference for request_key() - but it\nmay not yet be set and so an oops can happen.\n\nThis has been made more likely to happen by the fix for dynamic lookup\nfailure.\n\nFix this by firstly allocating a reference name and attaching it to the\nafs_cell record when the record is created. It can share the memory\nallocation with the cell name (unfortunately it can't just overlap the cell\nname by prepending it with \"afs@\" as the cell name already has a '.'\nprepended for other purposes). This reference name is then passed to\nrequest_key().\n\nSecondly, the anon key is now allocated on demand at the point a key is\nrequested in afs_request_key() if it is not already allocated. A mutex is\nused to prevent multiple allocation for a cell.\n\nThirdly, make afs_request_key_rcu() return NULL if the anonymous key isn't\nyet allocated (if we need it) and then the caller can return -ECHILD to\ndrop out of RCU-mode and afs_request_key() can be called.\n\nNote that the anonymous key is kind of necessary to make the key lookup\ncache work as that doesn't currently cache a negative lookup, but it's\nprobably worth some investigation to see if NULL can be used instead."
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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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"fs/afs/cell.c",
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"fs/afs/internal.h",
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"fs/afs/security.c"
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],
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"versions": [
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{
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"version": "fa4ccdccf1489a6dac4369a8c69f11b455b3355c",
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"lessThan": "bd18d2cbc9377c6b270c0b7ea44b0e6ed1d99c07",
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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": "7e33b15d5a6578a99ebf189cea34983270ae92dd",
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"lessThan": "5613bde937dfac6725e9c3fc766b9d6b8481e55b",
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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": "330e2c514823008b22e6afd2055715bc46dd8d55",
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"lessThan": "d27c71257825dced46104eefe42e4d9964bd032e",
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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": "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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"fs/afs/cell.c",
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"fs/afs/internal.h",
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"fs/afs/security.c"
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],
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"versions": [
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{
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"version": "6.17.9",
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"lessThan": "6.17.11",
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"status": "affected",
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"versionType": "semver"
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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": "6.17.9",
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"versionEndExcluding": "6.17.11"
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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/bd18d2cbc9377c6b270c0b7ea44b0e6ed1d99c07"
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},
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{
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"url": "https://git.kernel.org/stable/c/5613bde937dfac6725e9c3fc766b9d6b8481e55b"
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},
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{
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"url": "https://git.kernel.org/stable/c/d27c71257825dced46104eefe42e4d9964bd032e"
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}
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],
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"title": "afs: Fix delayed allocation of a cell's anonymous key",
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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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} |