{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-54683", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-01-09T09:49:29.693Z", "datePublished": "2025-01-11T12:29:54.407Z", "dateUpdated": "2025-01-11T12:29:54.407Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-01-11T12:29:54.407Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: IDLETIMER: Fix for possible ABBA deadlock\n\nDeletion of the last rule referencing a given idletimer may happen at\nthe same time as a read of its file in sysfs:\n\n| ======================================================\n| WARNING: possible circular locking dependency detected\n| 6.12.0-rc7-01692-g5e9a28f41134-dirty #594 Not tainted\n| ------------------------------------------------------\n| iptables/3303 is trying to acquire lock:\n| ffff8881057e04b8 (kn->active#48){++++}-{0:0}, at: __kernfs_remove+0x20\n|\n| but task is already holding lock:\n| ffffffffa0249068 (list_mutex){+.+.}-{3:3}, at: idletimer_tg_destroy_v]\n|\n| which lock already depends on the new lock.\n\nA simple reproducer is:\n\n| #!/bin/bash\n|\n| while true; do\n| iptables -A INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\"\n| iptables -D INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\"\n| done &\n| while true; do\n| cat /sys/class/xt_idletimer/timers/testme >/dev/null\n| done\n\nAvoid this by freeing list_mutex right after deleting the element from\nthe list, then continuing with the teardown."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/xt_IDLETIMER.c"], "versions": [{"version": "0902b469bd25065aa0688c3cee6f11744c817e7c", "lessThan": "8c2c8445cda8f59c38dec7dc10509bcb23ae26a0", "status": "affected", "versionType": "git"}, {"version": "0902b469bd25065aa0688c3cee6f11744c817e7c", "lessThan": "45fe76573a2557f632e248cc141342233f422b9a", "status": "affected", "versionType": "git"}, {"version": "0902b469bd25065aa0688c3cee6f11744c817e7c", "lessThan": "f36b01994d68ffc253c8296e2228dfe6e6431c03", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/xt_IDLETIMER.c"], "versions": [{"version": "2.6.36", "status": "affected"}, {"version": "0", "lessThan": "2.6.36", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.67", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.6", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13-rc3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/8c2c8445cda8f59c38dec7dc10509bcb23ae26a0"}, {"url": "https://git.kernel.org/stable/c/45fe76573a2557f632e248cc141342233f422b9a"}, {"url": "https://git.kernel.org/stable/c/f36b01994d68ffc253c8296e2228dfe6e6431c03"}], "title": "netfilter: IDLETIMER: Fix for possible ABBA deadlock", "x_generator": {"engine": "bippy-5f407fcff5a0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: IDLETIMER: Fix for possible ABBA deadlock\n\nDeletion of the last rule referencing a given idletimer may happen at\nthe same time as a read of its file in sysfs:\n\n| ======================================================\n| WARNING: possible circular locking dependency detected\n| 6.12.0-rc7-01692-g5e9a28f41134-dirty #594 Not tainted\n| ------------------------------------------------------\n| iptables/3303 is trying to acquire lock:\n| ffff8881057e04b8 (kn->active#48){++++}-{0:0}, at: __kernfs_remove+0x20\n|\n| but task is already holding lock:\n| ffffffffa0249068 (list_mutex){+.+.}-{3:3}, at: idletimer_tg_destroy_v]\n|\n| which lock already depends on the new lock.\n\nA simple reproducer is:\n\n| #!/bin/bash\n|\n| while true; do\n| iptables -A INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\"\n| iptables -D INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\"\n| done &\n| while true; do\n| cat /sys/class/xt_idletimer/timers/testme >/dev/null\n| done\n\nAvoid this by freeing list_mutex right after deleting the element from\nthe list, then continuing with the teardown."}], "id": "CVE-2024-54683", "lastModified": "2025-01-11T13:15:27.490", "metrics": {}, "published": "2025-01-11T13:15:27.490", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/45fe76573a2557f632e248cc141342233f422b9a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8c2c8445cda8f59c38dec7dc10509bcb23ae26a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f36b01994d68ffc253c8296e2228dfe6e6431c03"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: netfilter: IDLETIMER: Fix for possible ABBA deadlock", "id": "2337332", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2337332"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: IDLETIMER: Fix for possible ABBA deadlock\nDeletion of the last rule referencing a given idletimer may happen at\nthe same time as a read of its file in sysfs:\n| ======================================================\n| WARNING: possible circular locking dependency detected\n| 6.12.0-rc7-01692-g5e9a28f41134-dirty #594 Not tainted\n| ------------------------------------------------------\n| iptables/3303 is trying to acquire lock:\n| ffff8881057e04b8 (kn->active#48){++++}-{0:0}, at: __kernfs_remove+0x20\n|\n| but task is already holding lock:\n| ffffffffa0249068 (list_mutex){+.+.}-{3:3}, at: idletimer_tg_destroy_v]\n|\n| which lock already depends on the new lock.\nA simple reproducer is:\n| #!/bin/bash\n|\n| while true; do\n| iptables -A INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\"\n| iptables -D INPUT -i foo -j IDLETIMER --timeout 10 --label \"testme\"\n| done &\n| while true; do\n| cat /sys/class/xt_idletimer/timers/testme >/dev/null\n| done\nAvoid this by freeing list_mutex right after deleting the element from\nthe list, then continuing with the teardown."], "name": "CVE-2024-54683", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-01-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-54683\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-54683\nhttps://lore.kernel.org/linux-cve-announce/2025011159-CVE-2024-54683-042e@gregkh/T"], "threat_severity": "Moderate"}