143 lines
6.9 KiB
JSON
143 lines
6.9 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-2026-74593",
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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": "2026-08-15T05:44:03.919Z",
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"datePublished": "2026-08-22T15:31:44.160Z",
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"dateUpdated": "2026-08-23T12:47:36.437Z"
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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": "2026-08-23T12:47:36.437Z"
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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\nsched_ext: Take cgroup_lock() first in scx_cgroup_lock()\n\nscx_cgroup_lock() write-locks scx_cgroup_ops_rwsem and then takes\ncgroup_lock(), which can deadlock through kernfs:\n\n scx enable/disable cgroup rmdir cpu.weight write\n ------------------ ------------ ----------------\n cgroup_lock()\n percpu_down_write(rwsem)\n cgroup_lock()\n kernfs_get_active()\n percpu_down_read(rwsem)\n kernfs_drain()\n\nThe enable path waits for the rmdir to release cgroup_mutex. The rmdir,\ndeactivating the cpu controller's files, waits in kernfs_drain() for the\nwrite's active reference. The write, in scx_group_set_weight(), waits for\nthe rwsem behind the pending writer.\n\nTake cgroup_lock() first. The set_* paths take no cgroup locks inside the\nread side, so a pending write-lock then only waits for read sections that\nalways run to completion, and no dependency from the rwsem back to\ncgroup_mutex remains."
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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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"kernel/sched/ext/ext.c"
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],
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"versions": [
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{
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"version": "a5bd6ba30b3364354269b81ac55c2edca9a96d6d",
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"lessThan": "2ca6b43edf83f8fc368cc3094ee5f3b1e8e0b0f0",
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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": "a5bd6ba30b3364354269b81ac55c2edca9a96d6d",
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"lessThan": "a054c9ffa9b7a0dffb763837b91ac9d381ec6d10",
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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": "a5bd6ba30b3364354269b81ac55c2edca9a96d6d",
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"lessThan": "5f8b69642d18e1f3e11996707842ac530444e959",
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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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"kernel/sched/ext/ext.c"
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],
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"versions": [
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{
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"version": "6.18",
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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": "6.18",
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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": "6.18.46",
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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": "7.1.9",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "6.18",
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"versionEndExcluding": "6.18.46"
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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": "6.18",
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"versionEndExcluding": "7.1.9"
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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": "6.18",
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"versionEndExcluding": "7.2"
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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/2ca6b43edf83f8fc368cc3094ee5f3b1e8e0b0f0"
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},
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{
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"url": "https://git.kernel.org/stable/c/a054c9ffa9b7a0dffb763837b91ac9d381ec6d10"
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},
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{
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"url": "https://git.kernel.org/stable/c/5f8b69642d18e1f3e11996707842ac530444e959"
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}
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],
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"title": "sched_ext: Take cgroup_lock() first in scx_cgroup_lock()",
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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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} |