180 lines
11 KiB
JSON
180 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-53660",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-10-07T15:16:59.662Z",
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"datePublished": "2025-10-07T15:21:20.307Z",
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"dateUpdated": "2026-08-05T09:15:24.367Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:15:24.367Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, cpumap: Handle skb as well when clean up ptr_ring\n\nThe following warning was reported when running xdp_redirect_cpu with\nboth skb-mode and stress-mode enabled:\n\n ------------[ cut here ]------------\n Incorrect XDP memory type (-2128176192) usage\n WARNING: CPU: 7 PID: 1442 at net/core/xdp.c:405\n Modules linked in:\n CPU: 7 PID: 1442 Comm: kworker/7:0 Tainted: G 6.5.0-rc2+ #1\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n Workqueue: events __cpu_map_entry_free\n RIP: 0010:__xdp_return+0x1e4/0x4a0\n ......\n Call Trace:\n <TASK>\n ? show_regs+0x65/0x70\n ? __warn+0xa5/0x240\n ? __xdp_return+0x1e4/0x4a0\n ......\n xdp_return_frame+0x4d/0x150\n __cpu_map_entry_free+0xf9/0x230\n process_one_work+0x6b0/0xb80\n worker_thread+0x96/0x720\n kthread+0x1a5/0x1f0\n ret_from_fork+0x3a/0x70\n ret_from_fork_asm+0x1b/0x30\n </TASK>\n\nThe reason for the warning is twofold. One is due to the kthread\ncpu_map_kthread_run() is stopped prematurely. Another one is\n__cpu_map_ring_cleanup() doesn't handle skb mode and treats skbs in\nptr_ring as XDP frames.\n\nPrematurely-stopped kthread will be fixed by the preceding patch and\nptr_ring will be empty when __cpu_map_ring_cleanup() is called. But\nas the comments in __cpu_map_ring_cleanup() said, handling and freeing\nskbs in ptr_ring as well to \"catch any broken behaviour gracefully\"."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - Triggering requires local BPF syscalls (cpumap creation, XDP program load, map update/delete) to set up and then tear down the cpumap entry; a purely remote attacker cannot reach `__cpu_map_ring_cleanup()`.\nAC:L - The attacker controls every side of the race — map entry create/delete timing, the CPU pressure that starves the bound cpumap kthread, and the packet injection that leaves skbs in the ptr_ring — and no rare kernel config is needed since generic (skb-mode) XDP works on any netdev.\nPR:L - Requires `bpf_capable()` plus `CAP_NET_ADMIN`, i.e. an unprivileged-but-capability-granted service account (XDP/eBPF datapath agents, container network plugins) rather than full root, matching the kernel CNA's standard treatment of BPF-subsystem flaws as low-privilege local attacks.\nUI:N - The entire sequence — map setup, XDP attach, traffic generation, map teardown — is performed by the attacker's own process with no action by any other user.\nS:U - The type confusion and the resulting memory damage stay within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - With the bogus HAS_FRAGS bit set, `xdp_get_shared_info_from_frame()` dereferences an address computed from misread sk_buff fields, producing an unbounded out-of-bounds read of kernel memory that is then interpreted as page pointers — an information-disclosure primitive on top of the type confusion.\nI:H - Treating an sk_buff as an xdp_frame is a type confusion in which garbage `mem.type`/`data` values steer `page_pool_put_full_page()`, `page_frag_free()`, or `put_page()` at attacker-influenced addresses, giving page-refcount corruption and premature frees that are leverageable into a write primitive.\nA:H - The path reliably produces a `WARN()` splat (a panic under the common `panic_on_warn` setting), can oops on wild dereferences or unaligned 64-bit loads, and leaks the skb and its data on every occurrence."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"kernel/bpf/cpumap.c"
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],
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"versions": [
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{
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"version": "11941f8a85362f612df61f4aaab0e41b64d2111d",
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"lessThan": "b58d34068fd9f96bfc7d389988dfaf9a92a8fe00",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "11941f8a85362f612df61f4aaab0e41b64d2111d",
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"lessThan": "cbd000451885801e9bbfd9cf7a7946806a85cb5e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "7c62b75cd1a792e14b037fa4f61f9b18914e7de1",
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"status": "affected",
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"kernel/bpf/cpumap.c"
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],
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"versions": [
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{
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"version": "5.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.126",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.45",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.4.10",
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"lessThanOrEqual": "6.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.5",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "5.15.126"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/b58d34068fd9f96bfc7d389988dfaf9a92a8fe00"
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},
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{
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"url": "https://git.kernel.org/stable/c/cbd000451885801e9bbfd9cf7a7946806a85cb5e"
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},
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{
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"url": "https://git.kernel.org/stable/c/937345720d18f1ad006ba3d5dcb3fa121037b8a2"
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},
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{
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"url": "https://git.kernel.org/stable/c/7c62b75cd1a792e14b037fa4f61f9b18914e7de1"
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}
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],
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"title": "bpf, cpumap: Handle skb as well when clean up ptr_ring",
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