{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-26793", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.178Z", "datePublished": "2024-04-04T08:20:23.771Z", "dateUpdated": "2026-08-05T11:27:17.339Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:27:17.339Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: fix use-after-free and null-ptr-deref in gtp_newlink()\n\nThe gtp_link_ops operations structure for the subsystem must be\nregistered after registering the gtp_net_ops pernet operations structure.\n\nSyzkaller hit 'general protection fault in gtp_genl_dump_pdp' bug:\n\n[ 1010.702740] gtp: GTP module unloaded\n[ 1010.715877] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\n[ 1010.715888] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\n[ 1010.715895] CPU: 1 PID: 128616 Comm: a.out Not tainted 6.8.0-rc6-std-def-alt1 #1\n[ 1010.715899] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 04/01/2014\n[ 1010.715908] RIP: 0010:gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.715915] Code: 80 3c 02 00 0f 85 41 04 00 00 48 8b bb d8 05 00 00 e8 ed f6 ff ff 48 89 c2 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 4f 04 00 00 4c 89 e2 4c 8b 6d 00 48 b8 00 00 00\n[ 1010.715920] RSP: 0018:ffff888020fbf180 EFLAGS: 00010203\n[ 1010.715929] RAX: dffffc0000000000 RBX: ffff88800399c000 RCX: 0000000000000000\n[ 1010.715933] RDX: 0000000000000001 RSI: ffffffff84805280 RDI: 0000000000000282\n[ 1010.715938] RBP: 000000000000000d R08: 0000000000000001 R09: 0000000000000000\n[ 1010.715942] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800399cc80\n[ 1010.715947] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000400\n[ 1010.715953] FS: 00007fd1509ab5c0(0000) GS:ffff88805b300000(0000) knlGS:0000000000000000\n[ 1010.715958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1010.715962] CR2: 0000000000000000 CR3: 000000001c07a000 CR4: 0000000000750ee0\n[ 1010.715968] PKRU: 55555554\n[ 1010.715972] Call Trace:\n[ 1010.715985] ? __die_body.cold+0x1a/0x1f\n[ 1010.715995] ? die_addr+0x43/0x70\n[ 1010.716002] ? exc_general_protection+0x199/0x2f0\n[ 1010.716016] ? asm_exc_general_protection+0x1e/0x30\n[ 1010.716026] ? gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.716034] ? gtp_net_exit+0x150/0x150 [gtp]\n[ 1010.716042] __rtnl_newlink+0x1063/0x1700\n[ 1010.716051] ? rtnl_setlink+0x3c0/0x3c0\n[ 1010.716063] ? is_bpf_text_address+0xc0/0x1f0\n[ 1010.716070] ? kernel_text_address.part.0+0xbb/0xd0\n[ 1010.716076] ? __kernel_text_address+0x56/0xa0\n[ 1010.716084] ? unwind_get_return_address+0x5a/0xa0\n[ 1010.716091] ? create_prof_cpu_mask+0x30/0x30\n[ 1010.716098] ? arch_stack_walk+0x9e/0xf0\n[ 1010.716106] ? stack_trace_save+0x91/0xd0\n[ 1010.716113] ? stack_trace_consume_entry+0x170/0x170\n[ 1010.716121] ? __lock_acquire+0x15c5/0x5380\n[ 1010.716139] ? mark_held_locks+0x9e/0xe0\n[ 1010.716148] ? kmem_cache_alloc_trace+0x35f/0x3c0\n[ 1010.716155] ? __rtnl_newlink+0x1700/0x1700\n[ 1010.716160] rtnl_newlink+0x69/0xa0\n[ 1010.716166] rtnetlink_rcv_msg+0x43b/0xc50\n[ 1010.716172] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716179] ? lock_acquire+0x1fe/0x560\n[ 1010.716188] ? netlink_deliver_tap+0x12f/0xd50\n[ 1010.716196] netlink_rcv_skb+0x14d/0x440\n[ 1010.716202] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716208] ? netlink_ack+0xab0/0xab0\n[ 1010.716213] ? netlink_deliver_tap+0x202/0xd50\n[ 1010.716220] ? netlink_deliver_tap+0x218/0xd50\n[ 1010.716226] ? __virt_addr_valid+0x30b/0x590\n[ 1010.716233] netlink_unicast+0x54b/0x800\n[ 1010.716240] ? netlink_attachskb+0x870/0x870\n[ 1010.716248] ? __check_object_size+0x2de/0x3b0\n[ 1010.716254] netlink_sendmsg+0x938/0xe40\n[ 1010.716261] ? netlink_unicast+0x800/0x800\n[ 1010.716269] ? __import_iovec+0x292/0x510\n[ 1010.716276] ? netlink_unicast+0x800/0x800\n[ 1010.716284] __sock_sendmsg+0x159/0x190\n[ 1010.716290] ____sys_sendmsg+0x712/0x880\n[ 1010.716297] ? sock_write_iter+0x3d0/0x3d0\n[ 1010.716304] ? __ia32_sys_recvmmsg+0x270/0x270\n[ 1010.716309] ? lock_acquire+0x1fe/0x560\n[ 1010.716315] ? drain_array_locked+0x90/0x90\n[ 1010.716324] ___sys_sendmsg+0xf8/0x170\n[ 1010.716331] ? sendmsg_copy_msghdr+0x170/0x170\n[ 1010.716337] ? lockdep_init_map\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 vulnerability is triggered by an `RTM_NEWLINK` rtnetlink message with `IFLA_INFO_KIND=\"gtp\"` sent over an `AF_NETLINK` socket via `sendmsg()`, which requires local system access. There is no remote or adjacent-network path into `gtp_newlink()`.\nAC:L - The attacker creates and controls both sides of the race — one thread's own `RTM_NEWLINK` triggers `request_module(\"rtnl-link-gtp\")` while sibling threads block on `rtnl_lock` inside `__rtnl_newlink()`, and `rtnl_link_register()` releasing that lock inside `gtp_init()` hands a waiter the lock before `register_pernet_subsys()` completes. Syzkaller reproduced it from an ordinary userspace binary, and the same inverted ordering is also hit deterministically on the module-init error path.\nPR:L - `rtnetlink_rcv_msg()` only requires `netlink_net_capable(skb, CAP_NET_ADMIN)`, which is evaluated against the socket's `net->user_ns`, so an unprivileged user obtains it with `unshare -Urn`. Module autoload via `request_module()` in `__rtnl_newlink()` adds no further capability gate, so no real root is needed.\nUI:N - The attacker performs the entire sequence — autoload trigger plus racing link-creation requests — from their own threads. No victim action or pre-existing system state is required.\nS:U - The corruption stays within the kernel's own memory and security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - `ops_free_list()` frees the per-net `struct gtp_net` without clearing `ng->ptr[id]`, so `net_generic()` returns a dangling pointer whose reused slab contents are read as a list head and subsequently walked and marshalled to userspace by `gtp_genl_dump_pdp()`, giving a use-after-free read primitive over adjacent kernel heap data.\nI:H - `__list_add_rcu()` performs `next->prev = new` where `next` is read from the freed/garbage `gn->gtp_dev_list`, so an attacker who sprays the reallocated 16-byte object controls the destination and writes a kernel heap pointer to an arbitrary address — a write primitive suitable for control-flow hijacking.\nA:H - The unfixed path reliably produces a general protection fault / null-pointer dereference in `gtp_newlink()` (the reported oops), and the use-after-free variant corrupts the slab, both resulting in kernel crashes." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/gtp.c" ], "versions": [ { "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69", "lessThan": "01129059d5141d62fae692f7a336ae3bc712d3eb", "status": "affected", "versionType": "git" }, { "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69", "lessThan": "ec92aa2cab6f0048f10d6aa4f025c5885cb1a1b6", "status": "affected", "versionType": "git" }, { "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69", "lessThan": "e668b92a3a01429923fd5ca13e99642aab47de69", "status": "affected", "versionType": "git" }, { "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69", "lessThan": "9376d059a705c5dfaac566c2d09891242013ae16", "status": "affected", "versionType": "git" }, { "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69", "lessThan": "abd32d7f5c0294c1b2454c5a3b13b18446bac627", "status": "affected", "versionType": "git" }, { "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69", "lessThan": "93dd420bc41531c9a31498b9538ca83ba6ec191e", "status": "affected", "versionType": "git" }, { "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69", "lessThan": "5366969a19a8a0d2ffb3d27ef6e8905e5e4216f8", "status": "affected", "versionType": "git" }, { "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69", "lessThan": "616d82c3cfa2a2146dd7e3ae47bda7e877ee549e", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/gtp.c" ], "versions": [ { "version": "4.7", "status": "affected" }, { "version": "0", "lessThan": "4.7", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.309", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.271", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.212", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.151", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.81", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.21", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.9", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "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": "4.7", "versionEndExcluding": "4.19.309" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.4.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.10.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.15.151" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.1.81" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.6.21" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.7.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/01129059d5141d62fae692f7a336ae3bc712d3eb" }, { "url": "https://git.kernel.org/stable/c/ec92aa2cab6f0048f10d6aa4f025c5885cb1a1b6" }, { "url": "https://git.kernel.org/stable/c/e668b92a3a01429923fd5ca13e99642aab47de69" }, { "url": "https://git.kernel.org/stable/c/9376d059a705c5dfaac566c2d09891242013ae16" }, { "url": "https://git.kernel.org/stable/c/abd32d7f5c0294c1b2454c5a3b13b18446bac627" }, { "url": "https://git.kernel.org/stable/c/93dd420bc41531c9a31498b9538ca83ba6ec191e" }, { "url": "https://git.kernel.org/stable/c/5366969a19a8a0d2ffb3d27ef6e8905e5e4216f8" }, { "url": "https://git.kernel.org/stable/c/616d82c3cfa2a2146dd7e3ae47bda7e877ee549e" } ], "title": "gtp: fix use-after-free and null-ptr-deref in gtp_newlink()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": 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"tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-26793", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:50:52.672497Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:48.724Z" } } ] }, "dataVersion": "5.2" }