CVE-2026-31671
In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_report() struct xfrm_user_report is a __u8 proto field followed by a struct xfrm_selector which means there is three "empty" bytes of padding, but the…
Does this matter?
Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_report() struct xfrm_user_report is a __u8 proto field followed by a struct xfrm_selector which means there is three "empty" bytes of padding, but the padding is never zeroed before copying to userspace. Fix that up by zeroing the structure before setting individual member variables.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9Patch
- https://git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72Patch
- https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fePatch
- https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2ccPatch
- https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4Patch
- https://git.kernel.org/stable/c/d27c02eec529f78055a46a5c9e6c62684382b2d8Patch
- https://git.kernel.org/stable/c/e0c8542c3d097ed4205ded51868195d5d6ddac62Patch
- https://git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88Patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.