{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98378","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.345Z","datePublished":"2026-10-09T07:34:18.626Z","dateUpdated":"2026-10-09T07:34:18.626Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-09T07:34:18.626Z"},"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 ..."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/syscall.c"],"versions":[{"version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","lessThan":"68930f8d40ab4c10ca3b019f076136758fd100a8","status":"affected","versionType":"git"},{"version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","lessThan":"c251ed48bd9063cf7de6049421e78b6de989060f","status":"affected","versionType":"git"},{"version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","lessThan":"798a61edbc436cacdb659927d067368eeb1e30e2","status":"affected","versionType":"git"},{"version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","lessThan":"6e271f093d15d323f42de26f66556af53fa8e19f","status":"affected","versionType":"git"},{"version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","lessThan":"87ce4b53b7436b50fc984f0a6afaf77f68ac5573","status":"affected","versionType":"git"},{"version":"9f88361273082825d9f0d13a543d49f9fa0d44a8","lessThan":"50e80e2bb5e2be8515205b9c496b9640ddefa434","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/syscall.c"],"versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc5","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":"5.19","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.3-rc5"}]}]}],"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"}}}}