CVE-2026-80639 PUBLISHED

cxl/test: Fix __fortify_panic

Assigner: Linux
Reserved: 26.08.2026 Published: 28.08.2026 Updated: 28.08.2026

In the Linux kernel, the following vulnerability has been resolved:

cxl/test: Fix __fortify_panic

Fix a runtime assertion in setup_xor_mapping(). Fortify complains that it is potentially overflowing the xormaps array per __counted_by(nr_maps). Quiet the false positive by initializing @nr_maps earlier.

memcpy: detected buffer overflow: 32 byte write of buffer size 0 WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#8: modprobe/2728 Call Trace: __fortify_panic+0xd/0xf setup_xor_mapping+0x6c/0xa0 [cxl_translate]

[ dj: Fixed up @nr_entries to @nr_maps in commit log. ]

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 06377c54a133621d61fa76cdcea85077c5b958f4 to 8c4f27a7f364eab514d2fa55c11f39d505122f1b (excl.)
  • affected from 06377c54a133621d61fa76cdcea85077c5b958f4 to 08326b92c7a414a73b5b308d1daf0e91e0134dfc (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.19 is affected
  • unaffected from 0 to 6.19 (excl.)
  • unaffected from 7.1.5 to 7.1.* (incl.)
  • unaffected from 7.2 to * (incl.)

References