{"api_version":"1","generated_at":"2026-10-13T22:24:58+00:00","cve":"CVE-2026-98378","urls":{"html":"https://cve.report/CVE-2026-98378","api":"https://cve.report/api/cve/CVE-2026-98378.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98378","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98378"},"summary":{"title":"bpf: Skip unsettled links in link iterator","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip unsettled links in link iterator\n\nbpf_link_prime() inserts a link into link_idr before anon_inode_getfile()\nsucceeds and before bpf_link_settle() publishes the ID in link->id.\nbpf_link_by_id() treats such an ID-zero link as unsettled, but the link\niterator takes a reference without this check.\n\nIf anon_inode_getfile() then fails, the creator removes the ID and frees\nits still-private link directly.  The iterator is left with a dangling\nreference and its next bpf_link_put() accesses freed memory.\n\nTreat ID-zero entries as transient in bpf_link_get_curr_or_next(), just as\nbpf_link_by_id() does.\n\n  BUG: KASAN: slab-use-after-free in bpf_link_put\n  Write of size 8 by task exp/384\n  Call Trace:\n  bpf_link_put                    kernel/bpf/syscall.c:3372\n  bpf_link_seq_next               kernel/bpf/link_iter.c:33\n  bpf_seq_read                    kernel/bpf/bpf_iter.c:158\n  vfs_read                        fs/read_write.c:572\n  ksys_read                       fs/read_write.c:716\n  do_syscall_64                   arch/x86/entry/syscall_64.c:84\n  entry_SYSCALL_64_after_hwframe  arch/x86/entry/entry_64.S:121\n  Kernel panic - not syncing: KASAN: panic_on_warn set ...","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-09 08:16:56","updated_at":"2026-10-09 08:16:56"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/798a61edbc436cacdb659927d067368eeb1e30e2","name":"https://git.kernel.org/stable/c/798a61edbc436cacdb659927d067368eeb1e30e2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c251ed48bd9063cf7de6049421e78b6de989060f","name":"https://git.kernel.org/stable/c/c251ed48bd9063cf7de6049421e78b6de989060f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/68930f8d40ab4c10ca3b019f076136758fd100a8","name":"https://git.kernel.org/stable/c/68930f8d40ab4c10ca3b019f076136758fd100a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/87ce4b53b7436b50fc984f0a6afaf77f68ac5573","name":"https://git.kernel.org/stable/c/87ce4b53b7436b50fc984f0a6afaf77f68ac5573","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6e271f093d15d323f42de26f66556af53fa8e19f","name":"https://git.kernel.org/stable/c/6e271f093d15d323f42de26f66556af53fa8e19f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/50e80e2bb5e2be8515205b9c496b9640ddefa434","name":"https://git.kernel.org/stable/c/50e80e2bb5e2be8515205b9c496b9640ddefa434","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98378","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98378","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9f88361273082825d9f0d13a543d49f9fa0d44a8 68930f8d40ab4c10ca3b019f076136758fd100a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9f88361273082825d9f0d13a543d49f9fa0d44a8 c251ed48bd9063cf7de6049421e78b6de989060f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9f88361273082825d9f0d13a543d49f9fa0d44a8 798a61edbc436cacdb659927d067368eeb1e30e2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9f88361273082825d9f0d13a543d49f9fa0d44a8 6e271f093d15d323f42de26f66556af53fa8e19f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9f88361273082825d9f0d13a543d49f9fa0d44a8 87ce4b53b7436b50fc984f0a6afaf77f68ac5573 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9f88361273082825d9f0d13a543d49f9fa0d44a8 50e80e2bb5e2be8515205b9c496b9640ddefa434 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98378","cve":"CVE-2026-98378","epss":"0.001610000","percentile":"0.046950000","score_date":"2026-10-11","updated_at":"2026-10-12 00:13:21"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/bpf/syscall.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"68930f8d40ab4c10ca3b019f076136758fd100a8","status":"affected","version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","versionType":"git"},{"lessThan":"c251ed48bd9063cf7de6049421e78b6de989060f","status":"affected","version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","versionType":"git"},{"lessThan":"798a61edbc436cacdb659927d067368eeb1e30e2","status":"affected","version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","versionType":"git"},{"lessThan":"6e271f093d15d323f42de26f66556af53fa8e19f","status":"affected","version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","versionType":"git"},{"lessThan":"87ce4b53b7436b50fc984f0a6afaf77f68ac5573","status":"affected","version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","versionType":"git"},{"lessThan":"50e80e2bb5e2be8515205b9c496b9640ddefa434","status":"affected","version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/bpf/syscall.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.19"},{"lessThan":"5.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc5","versionStartIncluding":"5.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip unsettled links in link iterator\n\nbpf_link_prime() inserts a link into link_idr before anon_inode_getfile()\nsucceeds and before bpf_link_settle() publishes the ID in link->id.\nbpf_link_by_id() treats such an ID-zero link as unsettled, but the link\niterator takes a reference without this check.\n\nIf anon_inode_getfile() then fails, the creator removes the ID and frees\nits still-private link directly.  The iterator is left with a dangling\nreference and its next bpf_link_put() accesses freed memory.\n\nTreat ID-zero entries as transient in bpf_link_get_curr_or_next(), just as\nbpf_link_by_id() does.\n\n  BUG: KASAN: slab-use-after-free in bpf_link_put\n  Write of size 8 by task exp/384\n  Call Trace:\n  bpf_link_put                    kernel/bpf/syscall.c:3372\n  bpf_link_seq_next               kernel/bpf/link_iter.c:33\n  bpf_seq_read                    kernel/bpf/bpf_iter.c:158\n  vfs_read                        fs/read_write.c:572\n  ksys_read                       fs/read_write.c:716\n  do_syscall_64                   arch/x86/entry/syscall_64.c:84\n  entry_SYSCALL_64_after_hwframe  arch/x86/entry/entry_64.S:121\n  Kernel panic - not syncing: KASAN: panic_on_warn set ..."}],"providerMetadata":{"dateUpdated":"2026-10-09T07:34:18.626Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/68930f8d40ab4c10ca3b019f076136758fd100a8"},{"url":"https://git.kernel.org/stable/c/c251ed48bd9063cf7de6049421e78b6de989060f"},{"url":"https://git.kernel.org/stable/c/798a61edbc436cacdb659927d067368eeb1e30e2"},{"url":"https://git.kernel.org/stable/c/6e271f093d15d323f42de26f66556af53fa8e19f"},{"url":"https://git.kernel.org/stable/c/87ce4b53b7436b50fc984f0a6afaf77f68ac5573"},{"url":"https://git.kernel.org/stable/c/50e80e2bb5e2be8515205b9c496b9640ddefa434"}],"title":"bpf: Skip unsettled links in link iterator","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98378","datePublished":"2026-10-09T07:34:18.626Z","dateReserved":"2026-09-25T10:25:14.345Z","dateUpdated":"2026-10-09T07:34:18.626Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-09 08:16:56","lastModifiedDate":"2026-10-09 08:16:56","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98378","Ordinal":"1","Title":"bpf: Skip unsettled links in link iterator","CVE":"CVE-2026-98378","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98378","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip unsettled links in link iterator\n\nbpf_link_prime() inserts a link into link_idr before anon_inode_getfile()\nsucceeds and before bpf_link_settle() publishes the ID in link->id.\nbpf_link_by_id() treats such an ID-zero link as unsettled, but the link\niterator takes a reference without this check.\n\nIf anon_inode_getfile() then fails, the creator removes the ID and frees\nits still-private link directly.  The iterator is left with a dangling\nreference and its next bpf_link_put() accesses freed memory.\n\nTreat ID-zero entries as transient in bpf_link_get_curr_or_next(), just as\nbpf_link_by_id() does.\n\n  BUG: KASAN: slab-use-after-free in bpf_link_put\n  Write of size 8 by task exp/384\n  Call Trace:\n  bpf_link_put                    kernel/bpf/syscall.c:3372\n  bpf_link_seq_next               kernel/bpf/link_iter.c:33\n  bpf_seq_read                    kernel/bpf/bpf_iter.c:158\n  vfs_read                        fs/read_write.c:572\n  ksys_read                       fs/read_write.c:716\n  do_syscall_64                   arch/x86/entry/syscall_64.c:84\n  entry_SYSCALL_64_after_hwframe  arch/x86/entry/entry_64.S:121\n  Kernel panic - not syncing: KASAN: panic_on_warn set ...","Type":"Description","Title":"bpf: Skip unsettled links in link iterator"}]}}}