{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-36928", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-30T15:25:07.069Z", "datePublished": "2024-05-30T15:29:20.854Z", "dateUpdated": "2026-08-05T11:32:07.195Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:32:07.195Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/qeth: Fix kernel panic after setting hsuid\n\nSymptom:\nWhen the hsuid attribute is set for the first time on an IQD Layer3\ndevice while the corresponding network interface is already UP,\nthe kernel will try to execute a napi function pointer that is NULL.\n\nExample:\n---------------------------------------------------------------------------\n[ 2057.572696] illegal operation: 0001 ilc:1 [#1] SMP\n[ 2057.572702] Modules linked in: af_iucv qeth_l3 zfcp scsi_transport_fc sunrpc nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6\nnft_reject nft_ct nf_tables_set nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables libcrc32c nfnetlink ghash_s390 prng xts aes_s390 des_s390 de\ns_generic sha3_512_s390 sha3_256_s390 sha512_s390 vfio_ccw vfio_mdev mdev vfio_iommu_type1 eadm_sch vfio ext4 mbcache jbd2 qeth_l2 bridge stp llc dasd_eckd_mod qeth dasd_mod\n qdio ccwgroup pkey zcrypt\n[ 2057.572739] CPU: 6 PID: 60182 Comm: stress_client Kdump: loaded Not tainted 4.18.0-541.el8.s390x #1\n[ 2057.572742] Hardware name: IBM 3931 A01 704 (LPAR)\n[ 2057.572744] Krnl PSW : 0704f00180000000 0000000000000002 (0x2)\n[ 2057.572748] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:3 PM:0 RI:0 EA:3\n[ 2057.572751] Krnl GPRS: 0000000000000004 0000000000000000 00000000a3b008d8 0000000000000000\n[ 2057.572754] 00000000a3b008d8 cb923a29c779abc5 0000000000000000 00000000814cfd80\n[ 2057.572756] 000000000000012c 0000000000000000 00000000a3b008d8 00000000a3b008d8\n[ 2057.572758] 00000000bab6d500 00000000814cfd80 0000000091317e46 00000000814cfc68\n[ 2057.572762] Krnl Code:#0000000000000000: 0000 illegal\n >0000000000000002: 0000 illegal\n 0000000000000004: 0000 illegal\n 0000000000000006: 0000 illegal\n 0000000000000008: 0000 illegal\n 000000000000000a: 0000 illegal\n 000000000000000c: 0000 illegal\n 000000000000000e: 0000 illegal\n[ 2057.572800] Call Trace:\n[ 2057.572801] ([<00000000ec639700>] 0xec639700)\n[ 2057.572803] [<00000000913183e2>] net_rx_action+0x2ba/0x398\n[ 2057.572809] [<0000000091515f76>] __do_softirq+0x11e/0x3a0\n[ 2057.572813] [<0000000090ce160c>] do_softirq_own_stack+0x3c/0x58\n[ 2057.572817] ([<0000000090d2cbd6>] do_softirq.part.1+0x56/0x60)\n[ 2057.572822] [<0000000090d2cc60>] __local_bh_enable_ip+0x80/0x98\n[ 2057.572825] [<0000000091314706>] __dev_queue_xmit+0x2be/0xd70\n[ 2057.572827] [<000003ff803dd6d6>] afiucv_hs_send+0x24e/0x300 [af_iucv]\n[ 2057.572830] [<000003ff803dd88a>] iucv_send_ctrl+0x102/0x138 [af_iucv]\n[ 2057.572833] [<000003ff803de72a>] iucv_sock_connect+0x37a/0x468 [af_iucv]\n[ 2057.572835] [<00000000912e7e90>] __sys_connect+0xa0/0xd8\n[ 2057.572839] [<00000000912e9580>] sys_socketcall+0x228/0x348\n[ 2057.572841] [<0000000091514e1a>] system_call+0x2a6/0x2c8\n[ 2057.572843] Last Breaking-Event-Address:\n[ 2057.572844] [<0000000091317e44>] __napi_poll+0x4c/0x1d8\n[ 2057.572846]\n[ 2057.572847] Kernel panic - not syncing: Fatal exception in interrupt\n-------------------------------------------------------------------------------------------\n\nAnalysis:\nThere is one napi structure per out_q: card->qdio.out_qs[i].napi\nThe napi.poll functions are set during qeth_open().\n\nSince\ncommit 1cfef80d4c2b (\"s390/qeth: Don't call dev_close/dev_open (DOWN/UP)\")\nqeth_set_offline()/qeth_set_online() no longer call dev_close()/\ndev_open(). So if qeth_free_qdio_queues() cleared\ncard->qdio.out_qs[i].napi.poll while the network interface was UP and the\ncard was offline, they are not set again.\n\nReproduction:\nchzdev -e $devno layer2=0\nip link set dev $network_interface up\necho 0 > /sys/bus/ccw\n---truncated---" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable state is created through a local sysfs write (`/sys/bus/ccwgroup/devices/0.0.$devno/hsuid`) and the panic is then reached through local socket activity on the s390 IQD interface — the reproducer uses an AF_IUCV `connect()` syscall, and any local packet transmission on the netdev arms the stale/NULL TX NAPI.\nAC:L - No race and no memory-layout precondition — once the device has been through the offline/hsuid/online sequence, the very next `napi_schedule()` deterministically branches to a NULL `poll` pointer, so a single `connect()` or any outbound packet reliably panics the machine.\nPR:L - The crash is triggered by a completely unprivileged local user: the reported panic came from a non-root `stress_client` doing `af_iucv connect()`, and the dangling `napi_struct` entries left in `dev->napi_list` are also reachable via the unprivileged netdev generic-netlink NAPI dump, which carries no `GENL_ADMIN_PERM`.\nUI:N - No victim action is required at exploitation time — the hsuid configuration is a pre-existing, documented administrative state, and once the device is in it the attacker triggers the fault entirely on their own through normal socket calls.\nS:U - The freed queue objects, the NAPI list corruption and the resulting fault are all confined to the kernel of the same s390 LPAR/guest; no hypervisor, IOMMU or VM boundary is crossed.\nC:H - `qeth_free_qdio_queues()` frees the `qeth_qdio_out_q` allocations while their embedded `napi_struct` remain linked in `dev->napi_list` and the NAPI hash, so subsequent traversals (unprivileged `netdev-genl` NAPI dump, `free_netdev()`, `netif_set_threaded()`, netpoll) read freed heap memory that an attacker can spray, yielding kernel memory disclosure.\nI:H - The use-after-free leaves a stale `napi_struct` whose `->poll` function pointer and list linkage live in reallocatable slab memory; controlling that reallocation gives a hijacked indirect call and `list_del()` writes into attacker-influenced memory, i.e. a control-flow/arbitrary-write primitive.\nA:H - The documented result is an immediate `illegal operation` in softirq context ending in \"Kernel panic - not syncing: Fatal exception in interrupt\", a full system crash of the s390 LPAR that any local user can provoke on demand." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/s390/net/qeth_core_main.c" ], "versions": [ { "version": "64e3affee2881bb22df7ce45dd1f1fd7990e382b", "lessThan": "8792b557eb50b986f2496156d486d0c7c85a1524", "status": "affected", "versionType": "git" }, { "version": "86818409f989fee29c38528ed8fb085655603356", "lessThan": "10cb803aff3b11fe0bd5f274fc1c231a43e88df6", "status": "affected", "versionType": "git" }, { "version": "1cfef80d4c2b2c599189f36f36320b205d9447d9", "lessThan": "e28dd1e1bf3ebb52cdb877fb359e8978a51576e3", "status": "affected", "versionType": "git" }, { "version": "1cfef80d4c2b2c599189f36f36320b205d9447d9", "lessThan": "eae0aec245712c52a3ce9c05575b541a9eef5282", "status": "affected", "versionType": "git" }, { "version": "1cfef80d4c2b2c599189f36f36320b205d9447d9", "lessThan": "8a2e4d37afb8500b276e5ee903dee06f50ab0494", "status": "affected", "versionType": "git" }, { "version": "c33d5a5c5b2c79326190885040f1643793c67b29", "status": "affected", "versionType": "git" }, { "version": "29d6fe395087710280f8e11d4ae79569c4cb14b7", "status": "affected", "versionType": "git" }, { "version": "5.15.126", "lessThan": "5.15.159", "status": "affected", "versionType": "semver" }, { "version": "6.1.45", "lessThan": "6.1.91", "status": "affected", "versionType": "semver" }, { "version": "5.10.190", "lessThan": "5.11", "status": "affected", "versionType": "semver" }, { "version": "6.4.10", "lessThan": "6.5", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/s390/net/qeth_core_main.c" ], "versions": [ { "version": "6.5", "status": "affected" }, { "version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.159", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.91", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.31", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.10", "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": "5.15.126", "versionEndExcluding": "5.15.159" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.45", "versionEndExcluding": "6.1.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.6.31" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.8.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.190" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8792b557eb50b986f2496156d486d0c7c85a1524" }, { "url": "https://git.kernel.org/stable/c/10cb803aff3b11fe0bd5f274fc1c231a43e88df6" }, { "url": "https://git.kernel.org/stable/c/e28dd1e1bf3ebb52cdb877fb359e8978a51576e3" }, { "url": "https://git.kernel.org/stable/c/eae0aec245712c52a3ce9c05575b541a9eef5282" }, { "url": "https://git.kernel.org/stable/c/8a2e4d37afb8500b276e5ee903dee06f50ab0494" } ], "title": "s390/qeth: Fix kernel panic after setting hsuid", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 4.4, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-05-31T18:29:03.569739Z", "id": "CVE-2024-36928", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-11-06T15:55:40.336Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:43:50.063Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/8792b557eb50b986f2496156d486d0c7c85a1524", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/10cb803aff3b11fe0bd5f274fc1c231a43e88df6", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e28dd1e1bf3ebb52cdb877fb359e8978a51576e3", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/eae0aec245712c52a3ce9c05575b541a9eef5282", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/8a2e4d37afb8500b276e5ee903dee06f50ab0494", "tags": [ "x_transferred" ] } ] } ] } }