211 lines
10 KiB
JSON
211 lines
10 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-2026-46106",
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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": "2026-05-13T15:03:33.097Z",
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"datePublished": "2026-05-28T09:35:11.034Z",
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"dateUpdated": "2026-06-14T17:54:53.367Z"
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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": "2026-06-14T17:54:53.367Z"
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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\neventfs: Hold eventfs_mutex and SRCU when remount walks events\n\nCommit 340f0c7067a9 (\"eventfs: Update all the eventfs_inodes from the\nevents descriptor\") had eventfs_set_attrs() recurse through ei->children\non remount. The walk only holds the rcu_read_lock() taken by\ntracefs_apply_options() over tracefs_inodes, which is wrong:\n\n - list_for_each_entry over ei->children races with the list_del_rcu()\n in eventfs_remove_rec() -- LIST_POISON1 deref, same shape as\n d2603279c7d6.\n - eventfs_inodes are freed via call_srcu(&eventfs_srcu, ...).\n rcu_read_lock() does not extend an SRCU grace period, so ti->private\n can be reclaimed under the walk.\n - The writes to ei->attr race with eventfs_set_attr(), which holds\n eventfs_mutex.\n\nReproducer:\n\n while :; do mount -o remount,uid=$((RANDOM%1000)) /sys/kernel/tracing; done &\n while :; do\n echo \"p:kp submit_bio\" > /sys/kernel/tracing/kprobe_events\n echo > /sys/kernel/tracing/kprobe_events\n done\n\nWrap the events portion of tracefs_apply_options() in\neventfs_remount_lock()/_unlock() that take eventfs_mutex and\nsrcu_read_lock(&eventfs_srcu). eventfs_set_attrs() doesn't sleep so the\nnested rcu_read_lock() is fine; lockdep_assert_held() pins the contract.\n\nComment in tracefs_drop_inode() said \"RCU cycle\" -- it is SRCU."
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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/tracefs/event_inode.c",
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"fs/tracefs/inode.c",
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"fs/tracefs/internal.h"
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],
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"versions": [
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{
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"version": "7ec535ed8724d18ae4e714d2277a5b89450659d2",
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"lessThan": "ae9cd0b46b1890040006a2fc5e905c5d6053fd02",
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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": "340f0c7067a95281ad13734f8225f49c6cf52067",
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"lessThan": "44e64d8a432837308f4dda3ffe819f1ec092a0ba",
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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": "340f0c7067a95281ad13734f8225f49c6cf52067",
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"lessThan": "52b109f1b875b912d4ab2c5fdd8c322d47119d9b",
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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": "340f0c7067a95281ad13734f8225f49c6cf52067",
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"lessThan": "ed2ad73bcb0a7a6cc934097d4853b6d5124c317e",
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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": "340f0c7067a95281ad13734f8225f49c6cf52067",
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"lessThan": "07004a8c4b572171934390148ee48c4175c77eed",
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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": "99b86d85f7c73d676c50e8c35748f94dd41389da",
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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": "6.6.35",
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"lessThan": "6.6.140",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.9.6",
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"lessThan": "6.10",
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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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"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/tracefs/event_inode.c",
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"fs/tracefs/inode.c",
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"fs/tracefs/internal.h"
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],
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"versions": [
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{
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"version": "6.10",
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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": "6.10",
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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": "6.6.140",
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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": "6.12.88",
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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": "6.18.30",
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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": "7.0.7",
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"lessThanOrEqual": "7.0.*",
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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",
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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": "6.6.35",
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"versionEndExcluding": "6.6.140"
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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": "6.10",
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"versionEndExcluding": "6.12.88"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "6.18.30"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "7.0.7"
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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": "6.10",
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"versionEndExcluding": "7.1"
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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": "6.9.6"
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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/ae9cd0b46b1890040006a2fc5e905c5d6053fd02"
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},
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{
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"url": "https://git.kernel.org/stable/c/44e64d8a432837308f4dda3ffe819f1ec092a0ba"
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},
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{
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"url": "https://git.kernel.org/stable/c/52b109f1b875b912d4ab2c5fdd8c322d47119d9b"
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},
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{
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"url": "https://git.kernel.org/stable/c/ed2ad73bcb0a7a6cc934097d4853b6d5124c317e"
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},
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{
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"url": "https://git.kernel.org/stable/c/07004a8c4b572171934390148ee48c4175c77eed"
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}
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],
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"title": "eventfs: Hold eventfs_mutex and SRCU when remount walks events",
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"x_generator": {
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"engine": "bippy-1.2.0"
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} |