CVE-2026-68385 — s390/checksum: Fix csum_partial() without vector facility
In the Linux kernel, the following vulnerability has been resolved: s390/checksum: Fix csum_partial() without vector facility Currently csum_partial() calls csum_copy() with c…
Published: 2026-08-10 · CVSS: 9.8 · CVSS 3.1
In the Linux kernel, the following vulnerability has been resolved: s390/checksum: Fix csum_partial() without vector facility Currently csum_partial() calls csum_copy() with copy=false and dst=NULL. On machines without the vector facility, csum_copy() falls back to cksm(dst, ...), causing the checksum to be calculated from address zero instead of the source buffer. The VX implementation already checksums data loaded from src. Make the fallback do the same by passing src to cksm().
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7