CVE-2025-39743
In the Linux kernel, the following vulnerability has been resolved: jfs: truncate good inode pages when hard link is 0 The fileset value of the inode copy from the disk by the reproducer is AGGR_RESERVED_I.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.18%). 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: jfs: truncate good inode pages when hard link is 0 The fileset value of the inode copy from the disk by the reproducer is AGGR_RESERVED_I. When executing evict, its hard link number is 0, so its inode pages are not truncated. This causes the bugon to be triggered when executing clear_inode() because nrpages is greater than 0.
- 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
- 0.18% probability · 8th 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/1bb5cdc3e39f0c2b311fcb631258b7e60d3fb0d3Patch
- https://git.kernel.org/stable/c/2b1d5ca395a5fb170c3f885cd42c16179f7f54ecPatch
- https://git.kernel.org/stable/c/2d91b3765cd05016335cd5df5e5c6a29708ec058Patch
- https://git.kernel.org/stable/c/34d8e982bac48bdcca7524644a8825a580edce74Patch
- https://git.kernel.org/stable/c/5845b926c561b8333cd65169526eec357d7bb449Patch
- https://git.kernel.org/stable/c/89fff8e3d6710fc32507b8e19eb5afa9fb79b896Patch
- https://git.kernel.org/stable/c/8ed7275910fb7177012619864e04d3008763f3eaPatch
- https://git.kernel.org/stable/c/b5b471820c33365a8ccd2d463578bf4e47056c2cPatch
- https://git.kernel.org/stable/c/df3fd8daf278eca365f221749ae5b728e8382a04Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlMailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.