CVE-2026-46106

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46106", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.097Z", "datePublished": "2026-05-28T09:35:11.034Z", "dateUpdated": "2026-06-14T17:54:53.367Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-14T17:54:53.367Z"}, "descriptions": [{"lang": "en", "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/tracefs/event_inode.c", "fs/tracefs/inode.c", "fs/tracefs/internal.h"], "versions": [{"version": "7ec535ed8724d18ae4e714d2277a5b89450659d2", "lessThan": "ae9cd0b46b1890040006a2fc5e905c5d6053fd02", "status": "affected", "versionType": "git"}, {"version": "340f0c7067a95281ad13734f8225f49c6cf52067", "lessThan": "44e64d8a432837308f4dda3ffe819f1ec092a0ba", "status": "affected", "versionType": "git"}, {"version": "340f0c7067a95281ad13734f8225f49c6cf52067", "lessThan": "52b109f1b875b912d4ab2c5fdd8c322d47119d9b", "status": "affected", "versionType": "git"}, {"version": "340f0c7067a95281ad13734f8225f49c6cf52067", "lessThan": "ed2ad73bcb0a7a6cc934097d4853b6d5124c317e", "status": "affected", "versionType": "git"}, {"version": "340f0c7067a95281ad13734f8225f49c6cf52067", "lessThan": "07004a8c4b572171934390148ee48c4175c77eed", "status": "affected", "versionType": "git"}, {"version": "99b86d85f7c73d676c50e8c35748f94dd41389da", "status": "affected", "versionType": "git"}, {"version": "6.6.35", "lessThan": "6.6.140", "status": "affected", "versionType": "semver"}, {"version": "6.9.6", "lessThan": "6.10", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/tracefs/event_inode.c", "fs/tracefs/inode.c", "fs/tracefs/internal.h"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.88", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.7", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.6.35", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.12.88"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.18.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ae9cd0b46b1890040006a2fc5e905c5d6053fd02"}, {"url": "https://git.kernel.org/stable/c/44e64d8a432837308f4dda3ffe819f1ec092a0ba"}, {"url": "https://git.kernel.org/stable/c/52b109f1b875b912d4ab2c5fdd8c322d47119d9b"}, {"url": "https://git.kernel.org/stable/c/ed2ad73bcb0a7a6cc934097d4853b6d5124c317e"}, {"url": "https://git.kernel.org/stable/c/07004a8c4b572171934390148ee48c4175c77eed"}], "title": "eventfs: Hold eventfs_mutex and SRCU when remount walks events", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/tracefs/event_inode.c", "fs/tracefs/inode.c", "fs/tracefs/internal.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ae9cd0b46b1890040006a2fc5e905c5d6053fd02", "status": "affected", "version": "7ec535ed8724d18ae4e714d2277a5b89450659d2", "versionType": "git"}, {"lessThan": "44e64d8a432837308f4dda3ffe819f1ec092a0ba", "status": "affected", "version": "340f0c7067a95281ad13734f8225f49c6cf52067", "versionType": "git"}, {"lessThan": "52b109f1b875b912d4ab2c5fdd8c322d47119d9b", "status": "affected", "version": "340f0c7067a95281ad13734f8225f49c6cf52067", "versionType": "git"}, {"lessThan": "ed2ad73bcb0a7a6cc934097d4853b6d5124c317e", "status": "affected", "version": "340f0c7067a95281ad13734f8225f49c6cf52067", "versionType": "git"}, {"lessThan": "07004a8c4b572171934390148ee48c4175c77eed", "status": "affected", "version": "340f0c7067a95281ad13734f8225f49c6cf52067", "versionType": "git"}, {"status": "affected", "version": "99b86d85f7c73d676c50e8c35748f94dd41389da", "versionType": "git"}, {"lessThan": "6.6.140", "status": "affected", "version": "6.6.35", "versionType": "semver"}, {"lessThan": "6.10", "status": "affected", "version": "6.9.6", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/tracefs/event_inode.c", "fs/tracefs/inode.c", "fs/tracefs/internal.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"lessThan": "6.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.140", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.88", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.30", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B0173BEF-84A2-4374-8237-47E948C1D986", "versionEndExcluding": "6.6.140", "versionStartIncluding": "6.6.35", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C08EF979-9FB8-4108-83C6-C519594C5222", "versionEndExcluding": "6.12.88", "versionStartIncluding": "6.9.6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BF39AE08-AE6D-4410-8FBE-76F6BF5BF55B", "versionEndExcluding": "6.18.30", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E", "versionEndExcluding": "7.0.7", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-46106", "lastModified": "2026-06-25T21:18:59.773", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-28T10:16:25.950", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/07004a8c4b572171934390148ee48c4175c77eed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/44e64d8a432837308f4dda3ffe819f1ec092a0ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/52b109f1b875b912d4ab2c5fdd8c322d47119d9b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ae9cd0b46b1890040006a2fc5e905c5d6053fd02"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ed2ad73bcb0a7a6cc934097d4853b6d5124c317e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: eventfs: Hold eventfs_mutex and SRCU when remount walks events", "id": "2482546", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482546"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["A flaw was found in the Linux kernel's eventfs component. This vulnerability allows a local attacker to trigger a race condition during remount operations. By exploiting insufficient locking mechanisms when processing event descriptors, an attacker can cause memory corruption, leading to a denial of service (DoS) and system instability."], "name": "CVE-2026-46106", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46106\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46106\nhttps://lore.kernel.org/linux-cve-announce/2026052811-CVE-2026-46106-4967@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7ec535ed8724d18ae4e714d2277a5b89450659d2,ae9cd0b46b1890040006a2fc5e905c5d6053fd02)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[340f0c7067a95281ad13734f8225f49c6cf52067,44e64d8a432837308f4dda3ffe819f1ec092a0ba)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[340f0c7067a95281ad13734f8225f49c6cf52067,52b109f1b875b912d4ab2c5fdd8c322d47119d9b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[340f0c7067a95281ad13734f8225f49c6cf52067,ed2ad73bcb0a7a6cc934097d4853b6d5124c317e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[340f0c7067a95281ad13734f8225f49c6cf52067,07004a8c4b572171934390148ee48c4175c77eed)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "99b86d85f7c73d676c50e8c35748f94dd41389da"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.35,6.6.140)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.9.6,6.10)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.140,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.88,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.30,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.7,8.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-28T12:00:12.600143+00:00", "updated": "2026-08-12T04:00:04.140808+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}