{"api_version":"1","generated_at":"2026-04-23T00:42:15+00:00","cve":"CVE-2026-23419","urls":{"html":"https://cve.report/CVE-2026-23419","api":"https://cve.report/api/cve/CVE-2026-23419.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23419","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23419"},"summary":{"title":"net/rds: Fix circular locking dependency in rds_tcp_tune","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: Fix circular locking dependency in rds_tcp_tune\n\nsyzbot reported a circular locking dependency in rds_tcp_tune() where\nsk_net_refcnt_upgrade() is called while holding the socket lock:\n\n======================================================\nWARNING: possible circular locking dependency detected\n======================================================\nkworker/u10:8/15040 is trying to acquire lock:\nffffffff8e9aaf80 (fs_reclaim){+.+.}-{0:0},\nat: __kmalloc_cache_noprof+0x4b/0x6f0\n\nbut task is already holding lock:\nffff88805a3c1ce0 (k-sk_lock-AF_INET6){+.+.}-{0:0},\nat: rds_tcp_tune+0xd7/0x930\n\nThe issue occurs because sk_net_refcnt_upgrade() performs memory\nallocation (via get_net_track() -> ref_tracker_alloc()) while the\nsocket lock is held, creating a circular dependency with fs_reclaim.\n\nFix this by moving sk_net_refcnt_upgrade() outside the socket lock\ncritical section. This is safe because the fields modified by the\nsk_net_refcnt_upgrade() call (sk_net_refcnt, ns_tracker) are not\naccessed by any concurrent code path at this point.\n\nv2:\n  - Corrected fixes tag\n  - check patch line wrap nits\n  - ai commentary nits","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-03 14:16:27","updated_at":"2026-04-03 16:10:23"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6a877ececd6daa002a9a0002cd0fbca6592a9244","name":"https://git.kernel.org/stable/c/6a877ececd6daa002a9a0002cd0fbca6592a9244","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/026bbaeeab9e04534ee58882b6447300629b42f6","name":"https://git.kernel.org/stable/c/026bbaeeab9e04534ee58882b6447300629b42f6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8babb271403378ba6836f6c8599c5313d0e2355d","name":"https://git.kernel.org/stable/c/8babb271403378ba6836f6c8599c5313d0e2355d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8519e6883a942e510f33a0e634e27bcc3a844a40","name":"https://git.kernel.org/stable/c/8519e6883a942e510f33a0e634e27bcc3a844a40","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6ce948fa54599f369ff7fe8b793a6aae4b0762b2","name":"https://git.kernel.org/stable/c/6ce948fa54599f369ff7fe8b793a6aae4b0762b2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23419","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23419","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a58f13a881ed351198ffab4cf9953cf19d2ab3a 8babb271403378ba6836f6c8599c5313d0e2355d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a58f13a881ed351198ffab4cf9953cf19d2ab3a 8519e6883a942e510f33a0e634e27bcc3a844a40 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a58f13a881ed351198ffab4cf9953cf19d2ab3a 6ce948fa54599f369ff7fe8b793a6aae4b0762b2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a58f13a881ed351198ffab4cf9953cf19d2ab3a 026bbaeeab9e04534ee58882b6447300629b42f6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a58f13a881ed351198ffab4cf9953cf19d2ab3a 6a877ececd6daa002a9a0002cd0fbca6592a9244 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a6efabed754c9dcf27e6def71317b374f58a852 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.130 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.77 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.17 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.7 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"23419","cve":"CVE-2026-23419","epss":"0.000180000","percentile":"0.046140000","score_date":"2026-04-07","updated_at":"2026-04-08 00:03:39"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/rds/tcp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8babb271403378ba6836f6c8599c5313d0e2355d","status":"affected","version":"3a58f13a881ed351198ffab4cf9953cf19d2ab3a","versionType":"git"},{"lessThan":"8519e6883a942e510f33a0e634e27bcc3a844a40","status":"affected","version":"3a58f13a881ed351198ffab4cf9953cf19d2ab3a","versionType":"git"},{"lessThan":"6ce948fa54599f369ff7fe8b793a6aae4b0762b2","status":"affected","version":"3a58f13a881ed351198ffab4cf9953cf19d2ab3a","versionType":"git"},{"lessThan":"026bbaeeab9e04534ee58882b6447300629b42f6","status":"affected","version":"3a58f13a881ed351198ffab4cf9953cf19d2ab3a","versionType":"git"},{"lessThan":"6a877ececd6daa002a9a0002cd0fbca6592a9244","status":"affected","version":"3a58f13a881ed351198ffab4cf9953cf19d2ab3a","versionType":"git"},{"status":"affected","version":"2a6efabed754c9dcf27e6def71317b374f58a852","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/rds/tcp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.18"},{"lessThan":"5.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.77","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.17","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.77","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.17","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.7","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0-rc3","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: Fix circular locking dependency in rds_tcp_tune\n\nsyzbot reported a circular locking dependency in rds_tcp_tune() where\nsk_net_refcnt_upgrade() is called while holding the socket lock:\n\n======================================================\nWARNING: possible circular locking dependency detected\n======================================================\nkworker/u10:8/15040 is trying to acquire lock:\nffffffff8e9aaf80 (fs_reclaim){+.+.}-{0:0},\nat: __kmalloc_cache_noprof+0x4b/0x6f0\n\nbut task is already holding lock:\nffff88805a3c1ce0 (k-sk_lock-AF_INET6){+.+.}-{0:0},\nat: rds_tcp_tune+0xd7/0x930\n\nThe issue occurs because sk_net_refcnt_upgrade() performs memory\nallocation (via get_net_track() -> ref_tracker_alloc()) while the\nsocket lock is held, creating a circular dependency with fs_reclaim.\n\nFix this by moving sk_net_refcnt_upgrade() outside the socket lock\ncritical section. This is safe because the fields modified by the\nsk_net_refcnt_upgrade() call (sk_net_refcnt, ns_tracker) are not\naccessed by any concurrent code path at this point.\n\nv2:\n  - Corrected fixes tag\n  - check patch line wrap nits\n  - ai commentary nits"}],"providerMetadata":{"dateUpdated":"2026-04-03T13:24:23.958Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8babb271403378ba6836f6c8599c5313d0e2355d"},{"url":"https://git.kernel.org/stable/c/8519e6883a942e510f33a0e634e27bcc3a844a40"},{"url":"https://git.kernel.org/stable/c/6ce948fa54599f369ff7fe8b793a6aae4b0762b2"},{"url":"https://git.kernel.org/stable/c/026bbaeeab9e04534ee58882b6447300629b42f6"},{"url":"https://git.kernel.org/stable/c/6a877ececd6daa002a9a0002cd0fbca6592a9244"}],"title":"net/rds: Fix circular locking dependency in rds_tcp_tune","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23419","datePublished":"2026-04-03T13:24:23.958Z","dateReserved":"2026-01-13T15:37:46.014Z","dateUpdated":"2026-04-03T13:24:23.958Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-03 14:16:27","lastModifiedDate":"2026-04-03 16:10:23","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23419","Ordinal":"1","Title":"net/rds: Fix circular locking dependency in rds_tcp_tune","CVE":"CVE-2026-23419","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23419","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: Fix circular locking dependency in rds_tcp_tune\n\nsyzbot reported a circular locking dependency in rds_tcp_tune() where\nsk_net_refcnt_upgrade() is called while holding the socket lock:\n\n======================================================\nWARNING: possible circular locking dependency detected\n======================================================\nkworker/u10:8/15040 is trying to acquire lock:\nffffffff8e9aaf80 (fs_reclaim){+.+.}-{0:0},\nat: __kmalloc_cache_noprof+0x4b/0x6f0\n\nbut task is already holding lock:\nffff88805a3c1ce0 (k-sk_lock-AF_INET6){+.+.}-{0:0},\nat: rds_tcp_tune+0xd7/0x930\n\nThe issue occurs because sk_net_refcnt_upgrade() performs memory\nallocation (via get_net_track() -> ref_tracker_alloc()) while the\nsocket lock is held, creating a circular dependency with fs_reclaim.\n\nFix this by moving sk_net_refcnt_upgrade() outside the socket lock\ncritical section. This is safe because the fields modified by the\nsk_net_refcnt_upgrade() call (sk_net_refcnt, ns_tracker) are not\naccessed by any concurrent code path at this point.\n\nv2:\n  - Corrected fixes tag\n  - check patch line wrap nits\n  - ai commentary nits","Type":"Description","Title":"net/rds: Fix circular locking dependency in rds_tcp_tune"}]}}}