{"id":"CVE-2026-53069","revision":"a134405dc04a45579b42c67740283720","records":[{"revision":"a134405dc04a45579b42c67740283720","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53069","aliases":[],"title":"net, bpf: fix null-ptr-deref in xdp_master_redirect() for down master","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet, bpf: fix null-ptr-deref in xdp_master_redirect() for down master\n\nsyzkaller reported a kernel panic in bond_rr_gen_slave_id() reached via\nxdp_master_redirect(). Full decoded trace:\n\n https://syzkaller.appspot.com/bug?extid=80e046b8da2820b6ba73\n\nbond_rr_gen_slave_id() dereferences bond->rr_tx_counter, a per-CPU\ncounter that bonding only allocates in bond_open() when the mode is\nround-robin. If the bond device was never brought up, rr_tx_counter\nstays NULL.\n\nThe XDP redirect path can still reach that code on a bond that was\nnever opened: bpf_master_redirect_enabled_key is a global static key,\nso as soon as any bond device has native XDP attached, the\nXDP_TX -> xdp_master_redirect() interception is enabled for every\nslave system-wide. The path xdp_master_redirect() ->\nbond_xdp_get_xmit_slave() -> bond_xdp_xmit_roundrobin_slave_get() ->\nbond_rr_gen_slave_id() then runs against a bond that has no\nrr_tx_counter and crashes.\n\nFix this in the generic xdp_master_redirect() by refusing to call into\nthe master's ->ndo_xdp_get_xmit_slave() when the master device is not\nup. IFF_UP is only set after ->ndo_open() has successfully returned,\nso this reliably excludes masters whose XDP state has not been fully\ninitialized. Drop the frame with XDP_ABORTED so the exception is\nvisible via trace_xdp_exception() rather than silently falling through.\nThis is not specific to bonding: any current or future master that\ndefers XDP state allocation to ->ndo_open() is protected.","state":0,"publishedAt":"2026-06-24T16:30:10.93+00:00","modifiedAt":"2026-10-19T19:47:14.857+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/core/filter.c\"\n ],\n \"versions\": [\n {\n \"version\": \"879af96ffd72706c6e3278ea6b45b0b0e37ec5d7\",\n \"lessThan\": \"3128b294b426533c8d9162187446d93a8a160359\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"879af96ffd72706c6e3278ea6b45b0b0e37ec5d7\",\n \"lessThan\": \"acbf45bd584d924b320bee2a7fe2a26f64904d95\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"879af96ffd72706c6e3278ea6b45b0b0e37ec5d7\",\n \"lessThan\": \"866d3d9b87751b1944168fd82615505e0c0fd6cf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"879af96ffd72706c6e3278ea6b45b0b0e37ec5d7\",\n \"lessThan\": \"183128da0406b1c10e6f60b7b9fe70788b9c8c1d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"879af96ffd72706c6e3278ea6b45b0b0e37ec5d7\",\n \"lessThan\": \"7bad93e99737e4a5c0c14ac50c05152cf4e28022\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"879af96ffd72706c6e3278ea6b45b0b0e37ec5d7\",\n \"lessThan\": \"ea690b3b6e58ae00979af8195b4cc24df466b65e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"879af96ffd72706c6e3278ea6b45b0b0e37ec5d7\",\n \"lessThan\": \"1921f91298d1388a0bb9db8f83800c998b649cb3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/core/filter.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.15\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.15\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.141\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.91\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.33\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.10\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/3128b294b426533c8d9162187446d93a8a160359","https://git.kernel.org/stable/c/acbf45bd584d924b320bee2a7fe2a26f64904d95","https://git.kernel.org/stable/c/866d3d9b87751b1944168fd82615505e0c0fd6cf","https://git.kernel.org/stable/c/183128da0406b1c10e6f60b7b9fe70788b9c8c1d","https://git.kernel.org/stable/c/7bad93e99737e4a5c0c14ac50c05152cf4e28022","https://git.kernel.org/stable/c/ea690b3b6e58ae00979af8195b4cc24df466b65e","https://git.kernel.org/stable/c/1921f91298d1388a0bb9db8f83800c998b649cb3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53069","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53069","identifiers":["CVE-2026-53069"]},"retained":false,"historicalAffected":[]}],"coverage":[]}