185 lines
8.9 KiB
JSON
185 lines
8.9 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-2026-98079",
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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": "2026-09-25T10:19:56.074Z",
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"datePublished": "2026-09-25T10:24:16.892Z",
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"dateUpdated": "2026-10-21T12:54:23.769Z"
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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": "2026-10-21T12:54:23.769Z"
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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\nbtrfs: zstd: fix lost wakeup when waiting for a workspace\n\nA writer can sleep forever in zstd_get_workspace() even though a workspace\nis free. When zstd_alloc_workspace() fails, the task is queued on\nzwsm->wait and schedules unconditionally, never re-testing the pool.\nzstd_put_workspace() publishes the workspace and then calls cond_wake_up(),\nwhich only wakes when a sleeper is already visible, so a workspace returned\nbetween the failed allocation and prepare_to_wait() wakes nobody. The\nwindow is wide: zstd_alloc_workspace() goes through kvmalloc() and may\nenter reclaim.\n\nOnly a max level workspace triggers the wakeup and one is deliberately kept\nallocated as the fallback every waiter waits for, so once its wakeup is\nlost the writer stays in TASK_UNINTERRUPTIBLE until some other task happens\nto return one. Re-check the pool after prepare_to_wait() has published the\nwaiter, and use the workspace if one turned up."
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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/btrfs/zstd.c"
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],
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"versions": [
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{
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"version": "3f93aef535c8ea03e40cd8acf0753b3e6ed33e96",
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"lessThan": "14d982762945d9945c60bbd48b77df194dd8e28d",
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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": "3f93aef535c8ea03e40cd8acf0753b3e6ed33e96",
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"lessThan": "844603cf842ee67640d33f350e3fa60f3de7fad3",
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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": "3f93aef535c8ea03e40cd8acf0753b3e6ed33e96",
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"lessThan": "d8f57049521948df5f50797141472fbbed3b0723",
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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": "3f93aef535c8ea03e40cd8acf0753b3e6ed33e96",
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"lessThan": "0de9f31d447ae71ab08c7850a321682f8d2907c3",
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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": "3f93aef535c8ea03e40cd8acf0753b3e6ed33e96",
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"lessThan": "2acb9f3d1cc8f65dc81ed55e238cbf8e5b60bff7",
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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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"fs/btrfs/zstd.c"
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],
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"versions": [
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{
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"version": "5.1",
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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": "5.1",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.114",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.53",
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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": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.1",
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"versionEndExcluding": "6.6.160"
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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": "5.1",
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"versionEndExcluding": "6.12.114"
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"versionStartIncluding": "5.1",
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"versionEndExcluding": "7.2.7"
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.1",
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"versionEndExcluding": "7.3"
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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/14d982762945d9945c60bbd48b77df194dd8e28d"
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},
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{
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"url": "https://git.kernel.org/stable/c/844603cf842ee67640d33f350e3fa60f3de7fad3"
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},
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{
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"url": "https://git.kernel.org/stable/c/d8f57049521948df5f50797141472fbbed3b0723"
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},
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{
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"url": "https://git.kernel.org/stable/c/0de9f31d447ae71ab08c7850a321682f8d2907c3"
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},
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{
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"url": "https://git.kernel.org/stable/c/2acb9f3d1cc8f65dc81ed55e238cbf8e5b60bff7"
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}
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],
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"title": "btrfs: zstd: fix lost wakeup when waiting for a workspace",
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} |