libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.

• azl4 libnfs 6.0.2-13.azl4 on Azure Linux 4.0

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

1. Oct 27, 2026 at 9:20 AM UTC
   • Added affected products: azl4 libnfs 6.0.2-13.azl4 on Azure Linux 4.0.
   • Removed affected products: azl4 nmap 4:7.92-12.azl4 on Azure Linux 4.0.
2. Oct 22, 2026 at 7:40 AM UTC
   • Added affected products: azl4 nmap 4:7.92-12.azl4 on Azure Linux 4.0.
   • Removed affected products: azl3 libnfs 5.0.2-2 on Azure Linux 3.0.
   • Added fixed versions: 0:6.0.2-13.azl4.
   • The vendor changed its remediation guidance.

1. Jul 1, 2026 at 1:03 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Sep 28, 2026 at 11:20 AM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

3. Oct 22, 2026 at 1:13 AM UTC
   Updated by Microsoft Security Response Center

   The vendor changed the advisory after it was first published.

4. Nov 11, 2026 at 2:20 AM UTC
   Confirmed at the source

   Our collector saw this advisory during a later source check.