CVE-2026-97595

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97595", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.157Z", "datePublished": "2026-09-25T10:22:11.134Z", "dateUpdated": "2026-10-19T09:09:59.016Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:09:59.016Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmac802154: fix use-after-free of sdata via queued RX frames\n\nThe RX softirq producer ieee802154_subif_frame() queues received beacon\nand MAC-command frames onto local->rx_beacon_list / rx_mac_cmd_list and\nschedules a process-context worker, storing a raw mac_pkt->sdata (and\nskb->dev == sdata->dev) with neither a reference nor any locking:\n\n - the lists have no lock: the softirq producer list_add_tail()s while the\n mac_wq worker list_del()s, so sibling interfaces on the same phy corrupt\n the list;\n\n - the workers dereference the interface after it may have been freed.\n mac802154_rx_mac_cmd_worker() touches mac_pkt->sdata directly, and\n mac802154_rx_beacon_worker() -> mac802154_process_beacon() dereferences\n skb->dev (== sdata->dev). Removing an interface frees its sdata\n (netdev_priv) while a queued frame still points at it, so a later worker\n run is a use-after-free.\n\nReproduced under KASAN by flooding a victim interface with MAC command\nframes and removing it (the beacon path is the same class via skb->dev):\n\n BUG: KASAN: slab-use-after-free in mac802154_rx_mac_cmd_worker+0x463/0x630 [mac802154]\n Read of size 4 at addr ffff888002f9ea18 by task kworker/u8:1/31\n Workqueue: phy0-mac-cmds mac802154_rx_mac_cmd_worker [mac802154]\n Call Trace:\n mac802154_rx_mac_cmd_worker+0x463/0x630 [mac802154]\n process_one_work+0x611/0xe80\n worker_thread+0x52e/0xdc0\n kthread+0x30c/0x630\n ret_from_fork+0x2fd/0x3e0\n\nFix both lists together:\n\n - add local->rx_lock and take it around every list access: the softirq\n producer (plain spin_lock, softirq context) and the workers and flush\n (spin_lock_bh, process context);\n\n - pin the interface for the lifetime of a queued frame with\n netdev_hold()/netdev_put(), so the worker can safely dereference sdata /\n skb->dev even while the interface is being removed;\n\n - dequeue under the lock at the head and loop-drain the whole list in the\n workers (they previously processed one frame per run and relied on a\n later enqueue to drain the rest);\n\n - drop not-yet-started frames of an interface before it is unregistered,\n from ieee802154_if_remove() (after the RCU grace period) and from the\n ieee802154_remove_interfaces() loop -- the latter is the whole-phy\n teardown path, which does not go through ieee802154_if_remove().\n\nAn in-flight worker that already dequeued a frame keeps its own netdev\nreference; unregister_netdevice() then waits it out in netdev_run_todo(),\nwhich runs at rtnl_unlock() (rtnl released) and after the interface has\nbeen closed, so it does not pin rtnl. A worker blocked in an association\nTX only delays that one interface's unregister (the usual \"waiting for %s\nto become free\"), it does not hold rtnl. netdev_hold() is used for this\nreason instead of a cancel_work_sync() under rtnl, which would block on\nthe worker's unbounded MLME TX wait via ieee802154_sync_queue().\n\nThe mac-command worker additionally skips processing for a stopped\ninterface (ieee802154_sdata_running()), avoiding a needless association\nresponse during teardown."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - ieee802154_subif_frame() queues every received IEEE 802.15.4 MAC command frame (and beacons during a scan) onto local->rx_mac_cmd_list/rx_beacon_list from the RX tasklet with no lock, so a sender in radio range supplies the frames that race the mac_wq worker; 802.15.4 is a radio link, so this is adjacent rather than network.\nAC:H - A remote attacker only reaches the bug by making the tasklet's unlocked list_add_tail() collide with the worker's list_del() on another CPU. They control the flood but not the worker's timing, and the window is a few pointer writes. The use-after-free of sdata also needs an interface removal that the remote attacker cannot cause.\nPR:N - __ieee802154_rx_handle_packet() hands every parsed frame to each running non-monitor interface, and ieee802154_subif_frame() queues MAC command frames with no association or scan state required; unsecured frames pass mac802154_llsec_decrypt(), so no credentials are needed.\nUI:N - The victim only needs a running 802.15.4 interface, which is its normal operating state; the attacker sends the frames and the kernel queues and processes them without any user action.\nS:U - The corruption stays within the host kernel (mac802154 RX lists, cfg802154_mac_pkt, netdev_priv sdata) and crosses no VM or IOMMU boundary.\nC:H - A corrupted rx_mac_cmd_list or rx_beacon_list lets the worker dereference freed cfg802154_mac_pkt entries, their skb and sdata. Reclaimed slab contents are then read as kernel pointers, a use-after-free read that can disclose kernel memory.\nI:H - The worker does list_del(), kfree() and kfree_skb() on stale mac_pkt entries, and mac802154_process_association_req/resp() write through the freed sdata, giving write and double-free primitives on reclaimable slab memory.\nA:H - List corruption or the sdata use-after-free in mac802154_rx_mac_cmd_worker() or mac802154_rx_beacon_worker() causes a kernel oops; the commit's KASAN report shows such a slab-use-after-free."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/cfg802154.h", "net/mac802154/ieee802154_i.h", "net/mac802154/iface.c", "net/mac802154/main.c", "net/mac802154/rx.c", "net/mac802154/scan.c"], "versions": [{"version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "lessThan": "4826fd8373f684f9952536333ad45b26acd3455d", "status": "affected", "versionType": "git"}, {"version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "lessThan": "4740ef0518c5e3bf31ebfb2288a6ac3b462ead06", "status": "affected", "versionType": "git"}, {"version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "lessThan": "07f0214018d7241e3610c1be984c8abfce16c099", "status": "affected", "versionType": "git"}, {"version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "lessThan": "3d1fde35f95d7f02a7dc473c51d81e8d9e992cfc", "status": "affected", "versionType": "git"}, {"version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "lessThan": "2f37fba846c9fdff5fc15b6d93656057ccd13031", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/cfg802154.h", "net/mac802154/ieee802154_i.h", "net/mac802154/iface.c", "net/mac802154/main.c", "net/mac802154/rx.c", "net/mac802154/scan.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.3", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4826fd8373f684f9952536333ad45b26acd3455d"}, {"url": "https://git.kernel.org/stable/c/4740ef0518c5e3bf31ebfb2288a6ac3b462ead06"}, {"url": "https://git.kernel.org/stable/c/07f0214018d7241e3610c1be984c8abfce16c099"}, {"url": "https://git.kernel.org/stable/c/3d1fde35f95d7f02a7dc473c51d81e8d9e992cfc"}, {"url": "https://git.kernel.org/stable/c/2f37fba846c9fdff5fc15b6d93656057ccd13031"}], "title": "mac802154: fix use-after-free of sdata via queued RX frames", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/net/cfg802154.h", "net/mac802154/ieee802154_i.h", "net/mac802154/iface.c", "net/mac802154/main.c", "net/mac802154/rx.c", "net/mac802154/scan.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4826fd8373f684f9952536333ad45b26acd3455d", "status": "affected", "version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "versionType": "git"}, {"lessThan": "4740ef0518c5e3bf31ebfb2288a6ac3b462ead06", "status": "affected", "version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "versionType": "git"}, {"lessThan": "07f0214018d7241e3610c1be984c8abfce16c099", "status": "affected", "version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "versionType": "git"}, {"lessThan": "3d1fde35f95d7f02a7dc473c51d81e8d9e992cfc", "status": "affected", "version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "versionType": "git"}, {"lessThan": "2f37fba846c9fdff5fc15b6d93656057ccd13031", "status": "affected", "version": "57588c71177f0bfc08509c2c3a9bfe32850c0786", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/net/cfg802154.h", "net/mac802154/ieee802154_i.h", "net/mac802154/iface.c", "net/mac802154/main.c", "net/mac802154/rx.c", "net/mac802154/scan.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmac802154: fix use-after-free of sdata via queued RX frames\n\nThe RX softirq producer ieee802154_subif_frame() queues received beacon\nand MAC-command frames onto local->rx_beacon_list / rx_mac_cmd_list and\nschedules a process-context worker, storing a raw mac_pkt->sdata (and\nskb->dev == sdata->dev) with neither a reference nor any locking:\n\n - the lists have no lock: the softirq producer list_add_tail()s while the\n mac_wq worker list_del()s, so sibling interfaces on the same phy corrupt\n the list;\n\n - the workers dereference the interface after it may have been freed.\n mac802154_rx_mac_cmd_worker() touches mac_pkt->sdata directly, and\n mac802154_rx_beacon_worker() -> mac802154_process_beacon() dereferences\n skb->dev (== sdata->dev). Removing an interface frees its sdata\n (netdev_priv) while a queued frame still points at it, so a later worker\n run is a use-after-free.\n\nReproduced under KASAN by flooding a victim interface with MAC command\nframes and removing it (the beacon path is the same class via skb->dev):\n\n BUG: KASAN: slab-use-after-free in mac802154_rx_mac_cmd_worker+0x463/0x630 [mac802154]\n Read of size 4 at addr ffff888002f9ea18 by task kworker/u8:1/31\n Workqueue: phy0-mac-cmds mac802154_rx_mac_cmd_worker [mac802154]\n Call Trace:\n mac802154_rx_mac_cmd_worker+0x463/0x630 [mac802154]\n process_one_work+0x611/0xe80\n worker_thread+0x52e/0xdc0\n kthread+0x30c/0x630\n ret_from_fork+0x2fd/0x3e0\n\nFix both lists together:\n\n - add local->rx_lock and take it around every list access: the softirq\n producer (plain spin_lock, softirq context) and the workers and flush\n (spin_lock_bh, process context);\n\n - pin the interface for the lifetime of a queued frame with\n netdev_hold()/netdev_put(), so the worker can safely dereference sdata /\n skb->dev even while the interface is being removed;\n\n - dequeue under the lock at the head and loop-drain the whole list in the\n workers (they previously processed one frame per run and relied on a\n later enqueue to drain the rest);\n\n - drop not-yet-started frames of an interface before it is unregistered,\n from ieee802154_if_remove() (after the RCU grace period) and from the\n ieee802154_remove_interfaces() loop -- the latter is the whole-phy\n teardown path, which does not go through ieee802154_if_remove().\n\nAn in-flight worker that already dequeued a frame keeps its own netdev\nreference; unregister_netdevice() then waits it out in netdev_run_todo(),\nwhich runs at rtnl_unlock() (rtnl released) and after the interface has\nbeen closed, so it does not pin rtnl. A worker blocked in an association\nTX only delays that one interface's unregister (the usual \"waiting for %s\nto become free\"), it does not hold rtnl. netdev_hold() is used for this\nreason instead of a cancel_work_sync() under rtnl, which would block on\nthe worker's unbounded MLME TX wait via ieee802154_sync_queue().\n\nThe mac-command worker additionally skips processing for a stopped\ninterface (ieee802154_sdata_running()), avoiding a needless association\nresponse during teardown."}], "id": "CVE-2026-97595", "lastModified": "2026-10-19T10:17:29.053", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-25T11:17:10.770", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/07f0214018d7241e3610c1be984c8abfce16c099"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2f37fba846c9fdff5fc15b6d93656057ccd13031"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3d1fde35f95d7f02a7dc473c51d81e8d9e992cfc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4740ef0518c5e3bf31ebfb2288a6ac3b462ead06"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4826fd8373f684f9952536333ad45b26acd3455d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: mac802154: fix use-after-free of sdata via queued RX frames", "id": "2541177", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541177"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's mac802154 wireless network subsystem. A lack of proper locking and reference counting allows queued incoming frames to reference network interface data after the interface has been deleted, resulting in a use-after-free vulnerability. An attacker could exploit this timing issue by flooding an interface with network frames while it is being removed, leading to a Denial of Service (DoS) via a kernel crash or potential memory corruption."], "name": "CVE-2026-97595", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97595\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97595\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97595.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[57588c71177f0bfc08509c2c3a9bfe32850c0786,4740ef0518c5e3bf31ebfb2288a6ac3b462ead06)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[57588c71177f0bfc08509c2c3a9bfe32850c0786,07f0214018d7241e3610c1be984c8abfce16c099)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[57588c71177f0bfc08509c2c3a9bfe32850c0786,3d1fde35f95d7f02a7dc473c51d81e8d9e992cfc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[57588c71177f0bfc08509c2c3a9bfe32850c0786,2f37fba846c9fdff5fc15b6d93656057ccd13031)"}}], "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": "generic", "value": "6.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc3,*]"}}], "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": "2026-09-25T13:45:18.891774+00:00", "updated": "2026-10-01T11:00:06.064258+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}