CVE-2025-37839
In the Linux kernel, the following vulnerability has been resolved: jbd2: remove wrong sb->s_sequence check Journal emptiness is not determined by sb->s_sequence == 0 but rather by sb->s_start == 0 (which is set a few lines above).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: jbd2: remove wrong sb->s_sequence check Journal emptiness is not determined by sb->s_sequence == 0 but rather by sb->s_start == 0 (which is set a few lines above). Furthermore 0 is a valid transaction ID so the check can spuriously trigger. Remove the invalid WARN_ON.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.32% probability · 25th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3b4643ffaf72d7a5a357e9bf68b1775f8cfe7e77Patch
- https://git.kernel.org/stable/c/9eaec071f111cd2124ce9a5b93536d3f6837d457Patch
- https://git.kernel.org/stable/c/ad926f735b4d4f10768fec7d080cadeb6d075cacPatch
- https://git.kernel.org/stable/c/b0cca357f85beb6144ab60c62dcc98508cc044bfPatch
- https://git.kernel.org/stable/c/b479839525fe7906966cdc4b5b2afbca048558a1Patch
- https://git.kernel.org/stable/c/c88f7328bb0fff66520fc9164f02b1d06e083c1bPatch
- https://git.kernel.org/stable/c/c98eb9ffb1d9c98237b5e1668eee17654e129fb0Patch
- https://git.kernel.org/stable/c/cf30432f5b3064ff85d85639c2f0106f89c566f6Patch
- https://git.kernel.org/stable/c/e6eff39dd0fe4190c6146069cc16d160e71d1148Patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.htmlMailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.