{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-26961", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.201Z", "datePublished": "2024-05-01T05:19:16.361Z", "dateUpdated": "2026-08-05T11:28:39.786Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:28:39.786Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmac802154: fix llsec key resources release in mac802154_llsec_key_del\n\nmac802154_llsec_key_del() can free resources of a key directly without\nfollowing the RCU rules for waiting before the end of a grace period. This\nmay lead to use-after-free in case llsec_lookup_key() is traversing the\nlist of keys in parallel with a key deletion:\n\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 4 PID: 16000 at lib/refcount.c:25 refcount_warn_saturate+0x162/0x2a0\nModules linked in:\nCPU: 4 PID: 16000 Comm: wpan-ping Not tainted 6.7.0 #19\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014\nRIP: 0010:refcount_warn_saturate+0x162/0x2a0\nCall Trace:\n \n llsec_lookup_key.isra.0+0x890/0x9e0\n mac802154_llsec_encrypt+0x30c/0x9c0\n ieee802154_subif_start_xmit+0x24/0x1e0\n dev_hard_start_xmit+0x13e/0x690\n sch_direct_xmit+0x2ae/0xbc0\n __dev_queue_xmit+0x11dd/0x3c20\n dgram_sendmsg+0x90b/0xd60\n __sys_sendto+0x466/0x4c0\n __x64_sys_sendto+0xe0/0x1c0\n do_syscall_64+0x45/0xf0\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\nAlso, ieee802154_llsec_key_entry structures are not freed by\nmac802154_llsec_key_del():\n\nunreferenced object 0xffff8880613b6980 (size 64):\n comm \"iwpan\", pid 2176, jiffies 4294761134 (age 60.475s)\n hex dump (first 32 bytes):\n 78 0d 8f 18 80 88 ff ff 22 01 00 00 00 00 ad de x.......\".......\n 00 00 00 00 00 00 00 00 03 00 cd ab 00 00 00 00 ................\n backtrace:\n [] __kmem_cache_alloc_node+0x1e2/0x2d0\n [] kmalloc_trace+0x25/0xc0\n [] mac802154_llsec_key_add+0xac9/0xcf0\n [] ieee802154_add_llsec_key+0x5a/0x80\n [] nl802154_add_llsec_key+0x426/0x5b0\n [] genl_family_rcv_msg_doit+0x1fe/0x2f0\n [] genl_rcv_msg+0x531/0x7d0\n [] netlink_rcv_skb+0x169/0x440\n [] genl_rcv+0x28/0x40\n [] netlink_unicast+0x53c/0x820\n [] netlink_sendmsg+0x93b/0xe60\n [] ____sys_sendmsg+0xac5/0xca0\n [] ___sys_sendmsg+0x11d/0x1c0\n [] __sys_sendmsg+0xfa/0x1d0\n [] do_syscall_64+0x45/0xf0\n [] entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\nHandle the proper resource release in the RCU callback function\nmac802154_llsec_key_del_rcu().\n\nNote that if llsec_lookup_key() finds a key, it gets a refcount via\nllsec_key_get() and locally copies key id from key_entry (which is a\nlist element). So it's safe to call llsec_key_put() and free the list\nentry after the RCU grace period elapses.\n\nFound by Linux Verification Center (linuxtesting.org)." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The exploitable racing reader is driven from a local `AF_IEEE802154` datagram socket via `sendmsg()` into `mac802154_llsec_encrypt()`, and the key-deletion side is a local genetlink operation; no remote peer can reach both sides.\nAC:H - The unprivileged attacker controls only the reader side (an unbounded `sendmsg()` loop hitting `llsec_lookup_key()`); the freeing side is a `CAP_NET_ADMIN` key deletion (e.g. llsec key rotation) that the attacker cannot initiate, so the narrow window between `list_del_rcu()` and `kfree_sensitive()` depends on a condition outside their control.\nPR:L - Creating an `AF_IEEE802154` `SOCK_DGRAM` socket and transmitting requires no capability (only `SOCK_RAW` checks `CAP_NET_RAW`), so any unprivileged local user can occupy the RCU read side and take the use-after-free in their own context.\nUI:N - No victim action is required; the attacker simply keeps the transmit path spinning in `llsec_lookup_key()` until a key removal lands.\nS:U - The corruption is confined to kernel heap objects managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Use-after-free on `struct mac802154_llsec_key` lets an attacker reclaim the freed slab object and have the kernel treat attacker-controlled bytes as crypto transform state, yielding kernel memory disclosure primitives.\nI:H - The freed object is immediately written to (`kref_get` increments a refcount inside freed memory) and its `tfm[]`/`tfm0` pointers are dereferenced and called through by `llsec_do_encrypt()`/`llsec_do_decrypt()`, giving a heap-spray-to-control-flow-hijack path.\nA:H - The bug already produces a `refcount_warn_saturate()` splat and dereferences freed crypto transform pointers, reliably oopsing the kernel; the leaked `ieee802154_llsec_key_entry` allocations compound it." } ] } ], "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/llsec.c" ], "versions": [ { "version": "5d637d5aabd85132bd85779677d8acb708e0ed90", "lessThan": "068ab2759bc0b4daf0b964de61b2731449c86531", "status": "affected", "versionType": "git" }, { "version": "5d637d5aabd85132bd85779677d8acb708e0ed90", "lessThan": "d3d858650933d44ac12c1f31337e7110c2071821", "status": "affected", "versionType": "git" }, { "version": "5d637d5aabd85132bd85779677d8acb708e0ed90", "lessThan": "dcd51ab42b7a0431575689c5f74b8b6efd45fc2f", "status": "affected", "versionType": "git" }, { "version": "5d637d5aabd85132bd85779677d8acb708e0ed90", "lessThan": "20d3e1c8a1847497269f04d874b2a5818ec29e2d", "status": "affected", "versionType": "git" }, { "version": "5d637d5aabd85132bd85779677d8acb708e0ed90", "lessThan": "640297c3e897bd7e1481466a6a5cb9560f1edb88", "status": "affected", "versionType": "git" }, { "version": "5d637d5aabd85132bd85779677d8acb708e0ed90", "lessThan": "49c8951680d7b76fceaee89dcfbab1363fb24fd1", "status": "affected", "versionType": "git" }, { "version": "5d637d5aabd85132bd85779677d8acb708e0ed90", "lessThan": "e8a1e58345cf40b7b272e08ac7b32328b2543e40", "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/llsec.c" ], "versions": [ { "version": "3.16", "status": "affected" }, { "version": "0", "lessThan": "3.16", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.215", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.154", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.84", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.24", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.12", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.3", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "3.16", "versionEndExcluding": "5.10.215" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "5.15.154" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.1.84" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.6.24" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.7.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.8.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/068ab2759bc0b4daf0b964de61b2731449c86531" }, { "url": "https://git.kernel.org/stable/c/d3d858650933d44ac12c1f31337e7110c2071821" }, { "url": "https://git.kernel.org/stable/c/dcd51ab42b7a0431575689c5f74b8b6efd45fc2f" }, { "url": "https://git.kernel.org/stable/c/20d3e1c8a1847497269f04d874b2a5818ec29e2d" }, { "url": "https://git.kernel.org/stable/c/640297c3e897bd7e1481466a6a5cb9560f1edb88" }, { "url": "https://git.kernel.org/stable/c/49c8951680d7b76fceaee89dcfbab1363fb24fd1" }, { "url": "https://git.kernel.org/stable/c/e8a1e58345cf40b7b272e08ac7b32328b2543e40" } ], "title": "mac802154: fix llsec key resources release in mac802154_llsec_key_del", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-26961", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-05-28T17:51:17.536237Z" } } } ], "providerMetadata": { "orgId": 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"url": "https://git.kernel.org/stable/c/e8a1e58345cf40b7b272e08ac7b32328b2543e40", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": [ "x_transferred" ] } ] }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-05-12T11:50:51.260Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [ { "status": "affected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html" } ] } ] }, "dataVersion": "5.2" }