{"api_version":"1","generated_at":"2026-06-26T22:15:34+00:00","cve":"CVE-2026-53094","urls":{"html":"https://cve.report/CVE-2026-53094","api":"https://cve.report/api/cve/CVE-2026-53094.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53094","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53094"},"summary":{"title":"bpf: Fix stale offload->prog pointer after constant blinding","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix stale offload->prog pointer after constant blinding\n\nWhen a dev-bound-only BPF program (BPF_F_XDP_DEV_BOUND_ONLY) undergoes\nJIT compilation with constant blinding enabled (bpf_jit_harden >= 2),\nbpf_jit_blind_constants() clones the program. The original prog is then\nfreed in bpf_jit_prog_release_other(), which updates aux->prog to point\nto the surviving clone, but fails to update offload->prog.\n\nThis leaves offload->prog pointing to the freed original program. When\nthe network namespace is subsequently destroyed, cleanup_net() triggers\nbpf_dev_bound_netdev_unregister(), which iterates ondev->progs and calls\n__bpf_prog_offload_destroy(offload->prog). Accessing the freed prog\ncauses a page fault:\n\nBUG: unable to handle page fault for address: ffffc900085f1038\nWorkqueue: netns cleanup_net\nRIP: 0010:__bpf_prog_offload_destroy+0xc/0x80\nCall Trace:\n__bpf_offload_dev_netdev_unregister+0x257/0x350\nbpf_dev_bound_netdev_unregister+0x4a/0x90\nunregister_netdevice_many_notify+0x2a2/0x660\n...\ncleanup_net+0x21a/0x320\n\nThe test sequence that triggers this reliably is:\n\n1. Set net.core.bpf_jit_harden=2 (echo 2 > /proc/sys/net/core/bpf_jit_harden)\n2. Run xdp_metadata selftest, which creates a dev-bound-only XDP\n   program on a veth inside a netns (./test_progs -t xdp_metadata)\n3. cleanup_net -> page fault in __bpf_prog_offload_destroy\n\nDev-bound-only programs are unique in that they have an offload structure\nbut go through the normal JIT path instead of bpf_prog_offload_compile().\nThis means they are subject to constant blinding's prog clone-and-replace,\nwhile also having offload->prog that must stay in sync.\n\nFix this by updating offload->prog in bpf_jit_prog_release_other(),\nalongside the existing aux->prog update. Both are back-pointers to\nthe prog that must be kept in sync when the prog is replaced.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 17:17:23","updated_at":"2026-06-24 17:17:23"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/059525cf18e69a9313baf947d8898c6ee7ca6b65","name":"https://git.kernel.org/stable/c/059525cf18e69a9313baf947d8898c6ee7ca6b65","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/25484c39d1ec82a0368798d956da3de5039b3fe8","name":"https://git.kernel.org/stable/c/25484c39d1ec82a0368798d956da3de5039b3fe8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a713b72ff88cdab4d5d692908ab1259ada511f4d","name":"https://git.kernel.org/stable/c/a713b72ff88cdab4d5d692908ab1259ada511f4d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a1aa9ef47c299c5bbc30594d3c2f0589edf908e6","name":"https://git.kernel.org/stable/c/a1aa9ef47c299c5bbc30594d3c2f0589edf908e6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c79f8503d83d4665be461fb9e45e215d0380c67b","name":"https://git.kernel.org/stable/c/c79f8503d83d4665be461fb9e45e215d0380c67b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53094","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53094","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 a713b72ff88cdab4d5d692908ab1259ada511f4d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 25484c39d1ec82a0368798d956da3de5039b3fe8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 059525cf18e69a9313baf947d8898c6ee7ca6b65 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 c79f8503d83d4665be461fb9e45e215d0380c67b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 a1aa9ef47c299c5bbc30594d3c2f0589edf908e6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.141 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.91 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.33 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.10 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"53094","cve":"CVE-2026-53094","epss":"0.001680000","percentile":"0.063480000","score_date":"2026-06-25","updated_at":"2026-06-26 00:06:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/bpf/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a713b72ff88cdab4d5d692908ab1259ada511f4d","status":"affected","version":"2b3486bc2d237ec345b3942b7be5deabf8c8fed1","versionType":"git"},{"lessThan":"25484c39d1ec82a0368798d956da3de5039b3fe8","status":"affected","version":"2b3486bc2d237ec345b3942b7be5deabf8c8fed1","versionType":"git"},{"lessThan":"059525cf18e69a9313baf947d8898c6ee7ca6b65","status":"affected","version":"2b3486bc2d237ec345b3942b7be5deabf8c8fed1","versionType":"git"},{"lessThan":"c79f8503d83d4665be461fb9e45e215d0380c67b","status":"affected","version":"2b3486bc2d237ec345b3942b7be5deabf8c8fed1","versionType":"git"},{"lessThan":"a1aa9ef47c299c5bbc30594d3c2f0589edf908e6","status":"affected","version":"2b3486bc2d237ec345b3942b7be5deabf8c8fed1","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/bpf/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.3"},{"lessThan":"6.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.141","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.91","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.33","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.141","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.91","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.33","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.10","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix stale offload->prog pointer after constant blinding\n\nWhen a dev-bound-only BPF program (BPF_F_XDP_DEV_BOUND_ONLY) undergoes\nJIT compilation with constant blinding enabled (bpf_jit_harden >= 2),\nbpf_jit_blind_constants() clones the program. The original prog is then\nfreed in bpf_jit_prog_release_other(), which updates aux->prog to point\nto the surviving clone, but fails to update offload->prog.\n\nThis leaves offload->prog pointing to the freed original program. When\nthe network namespace is subsequently destroyed, cleanup_net() triggers\nbpf_dev_bound_netdev_unregister(), which iterates ondev->progs and calls\n__bpf_prog_offload_destroy(offload->prog). Accessing the freed prog\ncauses a page fault:\n\nBUG: unable to handle page fault for address: ffffc900085f1038\nWorkqueue: netns cleanup_net\nRIP: 0010:__bpf_prog_offload_destroy+0xc/0x80\nCall Trace:\n__bpf_offload_dev_netdev_unregister+0x257/0x350\nbpf_dev_bound_netdev_unregister+0x4a/0x90\nunregister_netdevice_many_notify+0x2a2/0x660\n...\ncleanup_net+0x21a/0x320\n\nThe test sequence that triggers this reliably is:\n\n1. Set net.core.bpf_jit_harden=2 (echo 2 > /proc/sys/net/core/bpf_jit_harden)\n2. Run xdp_metadata selftest, which creates a dev-bound-only XDP\n   program on a veth inside a netns (./test_progs -t xdp_metadata)\n3. cleanup_net -> page fault in __bpf_prog_offload_destroy\n\nDev-bound-only programs are unique in that they have an offload structure\nbut go through the normal JIT path instead of bpf_prog_offload_compile().\nThis means they are subject to constant blinding's prog clone-and-replace,\nwhile also having offload->prog that must stay in sync.\n\nFix this by updating offload->prog in bpf_jit_prog_release_other(),\nalongside the existing aux->prog update. Both are back-pointers to\nthe prog that must be kept in sync when the prog is replaced."}],"providerMetadata":{"dateUpdated":"2026-06-24T16:30:32.815Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a713b72ff88cdab4d5d692908ab1259ada511f4d"},{"url":"https://git.kernel.org/stable/c/25484c39d1ec82a0368798d956da3de5039b3fe8"},{"url":"https://git.kernel.org/stable/c/059525cf18e69a9313baf947d8898c6ee7ca6b65"},{"url":"https://git.kernel.org/stable/c/c79f8503d83d4665be461fb9e45e215d0380c67b"},{"url":"https://git.kernel.org/stable/c/a1aa9ef47c299c5bbc30594d3c2f0589edf908e6"}],"title":"bpf: Fix stale offload->prog pointer after constant blinding","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53094","datePublished":"2026-06-24T16:30:32.815Z","dateReserved":"2026-06-09T07:44:35.384Z","dateUpdated":"2026-06-24T16:30:32.815Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 17:17:23","lastModifiedDate":"2026-06-24 17:17:23","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53094","Ordinal":"1","Title":"bpf: Fix stale offload->prog pointer after constant blinding","CVE":"CVE-2026-53094","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53094","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix stale offload->prog pointer after constant blinding\n\nWhen a dev-bound-only BPF program (BPF_F_XDP_DEV_BOUND_ONLY) undergoes\nJIT compilation with constant blinding enabled (bpf_jit_harden >= 2),\nbpf_jit_blind_constants() clones the program. The original prog is then\nfreed in bpf_jit_prog_release_other(), which updates aux->prog to point\nto the surviving clone, but fails to update offload->prog.\n\nThis leaves offload->prog pointing to the freed original program. When\nthe network namespace is subsequently destroyed, cleanup_net() triggers\nbpf_dev_bound_netdev_unregister(), which iterates ondev->progs and calls\n__bpf_prog_offload_destroy(offload->prog). Accessing the freed prog\ncauses a page fault:\n\nBUG: unable to handle page fault for address: ffffc900085f1038\nWorkqueue: netns cleanup_net\nRIP: 0010:__bpf_prog_offload_destroy+0xc/0x80\nCall Trace:\n__bpf_offload_dev_netdev_unregister+0x257/0x350\nbpf_dev_bound_netdev_unregister+0x4a/0x90\nunregister_netdevice_many_notify+0x2a2/0x660\n...\ncleanup_net+0x21a/0x320\n\nThe test sequence that triggers this reliably is:\n\n1. Set net.core.bpf_jit_harden=2 (echo 2 > /proc/sys/net/core/bpf_jit_harden)\n2. Run xdp_metadata selftest, which creates a dev-bound-only XDP\n   program on a veth inside a netns (./test_progs -t xdp_metadata)\n3. cleanup_net -> page fault in __bpf_prog_offload_destroy\n\nDev-bound-only programs are unique in that they have an offload structure\nbut go through the normal JIT path instead of bpf_prog_offload_compile().\nThis means they are subject to constant blinding's prog clone-and-replace,\nwhile also having offload->prog that must stay in sync.\n\nFix this by updating offload->prog in bpf_jit_prog_release_other(),\nalongside the existing aux->prog update. Both are back-pointers to\nthe prog that must be kept in sync when the prog is replaced.","Type":"Description","Title":"bpf: Fix stale offload->prog pointer after constant blinding"}]}}}