{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53080", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-02T15:51:43.549Z", "datePublished": "2025-05-02T15:55:29.825Z", "dateUpdated": "2026-08-05T09:12:38.067Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:12:38.067Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Add missing overflow check in xdp_umem_reg\n\nThe number of chunks can overflow u32. Make sure to return -EINVAL on\noverflow. Also remove a redundant u32 cast assigning umem->npgs." } ], "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 bug is reached via AF_XDP setsockopt(XDP_UMEM_REG) on a local socket (socket(AF_XDP) → xsk_setsockopt → xdp_umem_create → xdp_umem_reg), not via remote packet processing.\nAC:L - The attacker fully controls umem size and chunk_size; on a large-memory AF_XDP host with sufficient memlock the overflow and subsequent OOB via crafted fill-queue addresses are reliably reproducible with no race or victim-state dependency.\nPR:L - Socket creation only requires ns_capable(net->user_ns, CAP_NET_RAW), which an unprivileged user can obtain in a user+net namespace (unshare -Urn); no init-namespace root is required for the vulnerable registration path.\nUI:N - Exploitation is entirely via the attacker’s own syscalls (socket/setsockopt/bind and ring operations); no victim action is required.\nS:U - Impact is memory corruption within the host kernel’s AF_XDP/umem subsystem and does not cross a VM, IOMMU, or other security authority boundary.\nC:H - Truncated umem->chunks undersizes pool->heads while addrs_cnt remains the full umem size, so xp_alloc indexing via xp_aligned_extract_idx yields out-of-bounds reads of adjacent kernel heap objects.\nI:H - The same heads[] OOB write/use of attacker-influenced xdp_buff_xsk slots is memory corruption that can be leveraged for control-flow hijacking or arbitrary kernel writes.\nA:H - Out-of-bounds heads[] access can oops/panic the kernel, and any such memory-corruption path is scored Availability High." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/xdp/xdp_umem.c" ], "versions": [ { "version": "bbff2f321a864ee07c9d3d1245af498023146951", "lessThan": "580634b03a55f04a3c1968bcbd97736c079c6601", "status": "affected", "versionType": "git" }, { "version": "bbff2f321a864ee07c9d3d1245af498023146951", "lessThan": "3cfc3564411acf96bf2fb791f706a1aa4f872c1d", "status": "affected", "versionType": "git" }, { "version": "bbff2f321a864ee07c9d3d1245af498023146951", "lessThan": "a069909acc4435eeb41d05ccc03baa447cc01b7e", "status": "affected", "versionType": "git" }, { "version": "bbff2f321a864ee07c9d3d1245af498023146951", "lessThan": "bb2e3bfb2a79db0c2057c6f701b782954394c67f", "status": "affected", "versionType": "git" }, { "version": "bbff2f321a864ee07c9d3d1245af498023146951", "lessThan": "c7df4813b149362248d6ef7be41a311e27bf75fe", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/xdp/xdp_umem.c" ], "versions": [ { "version": "4.18", "status": "affected" }, { "version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.177", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.105", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.22", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.9", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3", "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": "4.18", "versionEndExcluding": "5.10.177" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "5.15.105" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.1.22" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.2.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/580634b03a55f04a3c1968bcbd97736c079c6601" }, { "url": "https://git.kernel.org/stable/c/3cfc3564411acf96bf2fb791f706a1aa4f872c1d" }, { "url": "https://git.kernel.org/stable/c/a069909acc4435eeb41d05ccc03baa447cc01b7e" }, { "url": "https://git.kernel.org/stable/c/bb2e3bfb2a79db0c2057c6f701b782954394c67f" }, { "url": "https://git.kernel.org/stable/c/c7df4813b149362248d6ef7be41a311e27bf75fe" } ], "title": "xsk: Add missing overflow check in xdp_umem_reg", "x_generator": { "engine": "bippy-1.2.0" } } } }