{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53660", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-07T15:16:59.662Z", "datePublished": "2025-10-07T15:21:20.307Z", "dateUpdated": "2026-08-05T09:15:24.367Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:15:24.367Z" }, "descriptions": [ { "lang": "en", "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 \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 \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\"." } ], "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 - 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/cpumap.c" ], "versions": [ { "version": "11941f8a85362f612df61f4aaab0e41b64d2111d", "lessThan": "b58d34068fd9f96bfc7d389988dfaf9a92a8fe00", "status": "affected", "versionType": "git" }, { "version": "11941f8a85362f612df61f4aaab0e41b64d2111d", "lessThan": "cbd000451885801e9bbfd9cf7a7946806a85cb5e", "status": "affected", "versionType": "git" }, { "version": "11941f8a85362f612df61f4aaab0e41b64d2111d", "lessThan": "937345720d18f1ad006ba3d5dcb3fa121037b8a2", "status": "affected", "versionType": "git" }, { "version": "11941f8a85362f612df61f4aaab0e41b64d2111d", "lessThan": "7c62b75cd1a792e14b037fa4f61f9b18914e7de1", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/cpumap.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.126", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.45", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4.10", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5", "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", "versionEndExcluding": "5.15.126" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.45" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.4.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.5" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b58d34068fd9f96bfc7d389988dfaf9a92a8fe00" }, { "url": "https://git.kernel.org/stable/c/cbd000451885801e9bbfd9cf7a7946806a85cb5e" }, { "url": "https://git.kernel.org/stable/c/937345720d18f1ad006ba3d5dcb3fa121037b8a2" }, { "url": "https://git.kernel.org/stable/c/7c62b75cd1a792e14b037fa4f61f9b18914e7de1" } ], "title": "bpf, cpumap: Handle skb as well when clean up ptr_ring", "x_generator": { "engine": "bippy-1.2.0" } } } }