{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23359", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:46.000Z", "datePublished": "2026-03-25T10:27:43.070Z", "dateUpdated": "2026-03-25T10:27:43.070Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-03-25T10:27:43.070Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix stack-out-of-bounds write in devmap\n\nget_upper_ifindexes() iterates over all upper devices and writes their\nindices into an array without checking bounds.\n\nAlso the callers assume that the max number of upper devices is\nMAX_NEST_DEV and allocate excluded_devices[1+MAX_NEST_DEV] on the stack,\nbut that assumption is not correct and the number of upper devices could\nbe larger than MAX_NEST_DEV (e.g., many macvlans), causing a\nstack-out-of-bounds write.\n\nAdd a max parameter to get_upper_ifindexes() to avoid the issue.\nWhen there are too many upper devices, return -EOVERFLOW and abort the\nredirect.\n\nTo reproduce, create more than MAX_NEST_DEV(8) macvlans on a device with\nan XDP program attached using BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS.\nThen send a packet to the device to trigger the XDP redirect path."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/devmap.c"], "versions": [{"version": "aeea1b86f9363f3feabb496534d886f082a89f21", "lessThan": "5000e40acc8d0c36ab709662e32120986ac22e7e", "status": "affected", "versionType": "git"}, {"version": "aeea1b86f9363f3feabb496534d886f082a89f21", "lessThan": "8a95fb9df1105b1618872c2846a6c01e3ba20b45", "status": "affected", "versionType": "git"}, {"version": "aeea1b86f9363f3feabb496534d886f082a89f21", "lessThan": "d2c31d8e03d05edc16656e5ffe187f0d1da763d7", "status": "affected", "versionType": "git"}, {"version": "aeea1b86f9363f3feabb496534d886f082a89f21", "lessThan": "75d474702b2ba8b6bcb26eb3004dbc5e95ffd5d2", "status": "affected", "versionType": "git"}, {"version": "aeea1b86f9363f3feabb496534d886f082a89f21", "lessThan": "ca831567908fd3f73cf97d8a6c09a5054697a182", "status": "affected", "versionType": "git"}, {"version": "aeea1b86f9363f3feabb496534d886f082a89f21", "lessThan": "b7bf516c3ecd9a2aae2dc2635178ab87b734fef1", "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/devmap.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.77", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.17", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.7", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0-rc2", "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": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.77"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.19.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.0-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5000e40acc8d0c36ab709662e32120986ac22e7e"}, {"url": "https://git.kernel.org/stable/c/8a95fb9df1105b1618872c2846a6c01e3ba20b45"}, {"url": "https://git.kernel.org/stable/c/d2c31d8e03d05edc16656e5ffe187f0d1da763d7"}, {"url": "https://git.kernel.org/stable/c/75d474702b2ba8b6bcb26eb3004dbc5e95ffd5d2"}, {"url": "https://git.kernel.org/stable/c/ca831567908fd3f73cf97d8a6c09a5054697a182"}, {"url": "https://git.kernel.org/stable/c/b7bf516c3ecd9a2aae2dc2635178ab87b734fef1"}], "title": "bpf: Fix stack-out-of-bounds write in devmap", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix stack-out-of-bounds write in devmap\n\nget_upper_ifindexes() iterates over all upper devices and writes their\nindices into an array without checking bounds.\n\nAlso the callers assume that the max number of upper devices is\nMAX_NEST_DEV and allocate excluded_devices[1+MAX_NEST_DEV] on the stack,\nbut that assumption is not correct and the number of upper devices could\nbe larger than MAX_NEST_DEV (e.g., many macvlans), causing a\nstack-out-of-bounds write.\n\nAdd a max parameter to get_upper_ifindexes() to avoid the issue.\nWhen there are too many upper devices, return -EOVERFLOW and abort the\nredirect.\n\nTo reproduce, create more than MAX_NEST_DEV(8) macvlans on a device with\nan XDP program attached using BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS.\nThen send a packet to the device to trigger the XDP redirect path."}], "id": "CVE-2026-23359", "lastModified": "2026-03-25T15:41:33.977", "metrics": {}, "published": "2026-03-25T11:16:34.740", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5000e40acc8d0c36ab709662e32120986ac22e7e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/75d474702b2ba8b6bcb26eb3004dbc5e95ffd5d2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8a95fb9df1105b1618872c2846a6c01e3ba20b45"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b7bf516c3ecd9a2aae2dc2635178ab87b734fef1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca831567908fd3f73cf97d8a6c09a5054697a182"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2c31d8e03d05edc16656e5ffe187f0d1da763d7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: bpf: Fix stack-out-of-bounds write in devmap", "id": "2451202", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451202"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel. The `get_upper_ifindexes()` function, which collects network device indices, fails to check array boundaries when writing these indices. This allows a local attacker to create a large number of virtual network interfaces (macvlans), causing a stack-out-of-bounds write. The consequence is a denial of service (DoS), as the system aborts network packet redirection, affecting network availability."], "name": "CVE-2026-23359", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23359\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23359\nhttps://lore.kernel.org/linux-cve-announce/2026032538-CVE-2026-23359-35fd@gregkh/T"], "statement": "This flaw affects systems using XDP (eXpress Data Path) with BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS on devices with many upper interfaces (>8 macvlans). The stack buffer overflow occurs because MAX_NEST_DEV assumption doesn't hold for all configurations. Requires ability to create many macvlan interfaces and attach XDP programs.", "threat_severity": "Moderate"}