{"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":"2026-05-11T22:05:20.650Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:05:20.650Z"},"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":"88df604f0d16a692867582350ce3f2fcd22243f1","status":"affected","versionType":"git"},{"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":"5.15.203","lessThanOrEqual":"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","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":"5.15.203"},{"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"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/88df604f0d16a692867582350ce3f2fcd22243f1"},{"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"}}}}