{"id":"CVE-2025-37839","title":"jbd2: remove wrong sb->s_sequence check","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: remove wrong sb->s_sequence check\n\nJournal emptiness is not determined by sb->s_sequence == 0 but rather by\nsb->s_start == 0 (which is set a few lines above). Fur…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < cf30432f5b3064ff85d85639c2f0106f89c566f6","Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < b479839525fe7906966cdc4b5b2afbca048558a1","Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < ad926f735b4d4f10768fec7d080cadeb6d075cac","Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < 3b4643ffaf72d7a5a357e9bf68b1775f8cfe7e77","Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < c88f7328bb0fff66520fc9164f02b1d06e083c1b","Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < 9eaec071f111cd2124ce9a5b93536d3f6837d457","Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < c98eb9ffb1d9c98237b5e1668eee17654e129fb0","Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < b0cca357f85beb6144ab60c62dcc98508cc044bf","Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < e6eff39dd0fe4190c6146069cc16d160e71d1148","Linux dd8ff32c1e7ed10fb0e168b4431983e09acbeb2f","Linux >= 3.2.71 < 3.3","Linux 3.4"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:41:59.240415Z"},"published":"2025-05-09","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:52:04.704Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-37839","references":[{"url":"https://git.kernel.org/stable/c/cf30432f5b3064ff85d85639c2f0106f89c566f6"},{"url":"https://git.kernel.org/stable/c/b479839525fe7906966cdc4b5b2afbca048558a1"},{"url":"https://git.kernel.org/stable/c/ad926f735b4d4f10768fec7d080cadeb6d075cac"},{"url":"https://git.kernel.org/stable/c/3b4643ffaf72d7a5a357e9bf68b1775f8cfe7e77"},{"url":"https://git.kernel.org/stable/c/c88f7328bb0fff66520fc9164f02b1d06e083c1b"},{"url":"https://git.kernel.org/stable/c/9eaec071f111cd2124ce9a5b93536d3f6837d457"},{"url":"https://git.kernel.org/stable/c/c98eb9ffb1d9c98237b5e1668eee17654e129fb0"},{"url":"https://git.kernel.org/stable/c/b0cca357f85beb6144ab60c62dcc98508cc044bf"},{"url":"https://git.kernel.org/stable/c/e6eff39dd0fe4190c6146069cc16d160e71d1148"}],"tags":["cve.org"],"epss":0.00334,"epssPercentile":0.26936,"ingestedAt":"2026-11-05T22:38:31.882Z","slug":"CVE-2025-37839","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\njbd2: remove wrong sb->s_sequence check\n\nJournal emptiness is not determined by sb->s_sequence == 0 but rather by\nsb->s_start == 0 (which is set a few lines above). Furthermore 0 is a\nvalid transaction ID so the check can spuriously trigger. Remove the\ninvalid WARN_ON.\n\n## Affected\n\n- `Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < cf30432f5b3064ff85d85639c2f0106f89c566f6`\n- `Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < b479839525fe7906966cdc4b5b2afbca048558a1`\n- `Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < ad926f735b4d4f10768fec7d080cadeb6d075cac`\n- `Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < 3b4643ffaf72d7a5a357e9bf68b1775f8cfe7e77`\n- `Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < c88f7328bb0fff66520fc9164f02b1d06e083c1b`\n- `Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < 9eaec071f111cd2124ce9a5b93536d3f6837d457`\n- `Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < c98eb9ffb1d9c98237b5e1668eee17654e129fb0`\n- `Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < b0cca357f85beb6144ab60c62dcc98508cc044bf`\n- `Linux >= 24bcc89c7e7c64982e6192b4952a0a92379fc341 < e6eff39dd0fe4190c6146069cc16d160e71d1148`\n- `Linux dd8ff32c1e7ed10fb0e168b4431983e09acbeb2f`\n- `Linux >= 3.2.71 < 3.3`\n- `Linux 3.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}