AZL-83873
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-83873.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-83873
- Upstream
- Published
- 2026-04-24T15:16:46Z
- Modified
- 2026-08-28T17:47:52Z
- Summary
- CVE-2026-31664 affecting package kernel for versions less than 6.6.137.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
xfrm: clear trailing padding in build_polexpire()
build_expire() clears the trailing padding bytes of struct xfrm_user_expire after setting the hard field via memset_after(), but the analogous function build_polexpire() does not do this for struct xfrm_user_polexpire.
The padding bytes after the __u8 hard field are left uninitialized from the heap allocation, and are then sent to userspace via netlink multicast to XFRMNLGRP_EXPIRE listeners, leaking kernel heap memory contents.
Add the missing memset_after() call, matching build_expire().
- References