CVE-2026-23083

Summary

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

fou: Don't allow 0 for FOU_ATTR_IPPROTO.

fou_udp_recv() has the same problem mentioned in the previous patch.

If FOU_ATTR_IPPROTO is set to 0, skb is not freed by fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu().

Let's forbid 0 for FOU_ATTR_IPPROTO.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux23461551c00628c3f3fe9cf837bf53cf8f212b63 < c7498f9bc390479ccfad7c7f2332237ff4945b03affected
LinuxLinux23461551c00628c3f3fe9cf837bf53cf8f212b63 < 611ef4bd9c73d9e6d87bed57a635ff1fdd8c91eaaffected
LinuxLinux23461551c00628c3f3fe9cf837bf53cf8f212b63 < 6e983789b7588ee59cbf303583546c043bad8e19affected
LinuxLinux23461551c00628c3f3fe9cf837bf53cf8f212b63 < 1cc98b8887cabb1808d2f4a37cd10a7be7574771affected
LinuxLinux23461551c00628c3f3fe9cf837bf53cf8f212b63 < b7db31a52c3862a1a32202a273a4c32e7f5f4823affected
LinuxLinux23461551c00628c3f3fe9cf837bf53cf8f212b63 < 9b75dff8446ec871030d8daf5a69e74f5fe8b956affected
LinuxLinux23461551c00628c3f3fe9cf837bf53cf8f212b63 < 7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5affected
LinuxLinux3.18affected
LinuxLinux0 < 3.18unaffected
LinuxLinux5.10.249 <= 5.10.*unaffected
LinuxLinux5.15.199 <= 5.15.*unaffected
LinuxLinux6.1.162 <= 6.1.*unaffected
LinuxLinux6.6.122 <= 6.6.*unaffected
LinuxLinux6.12.68 <= 6.12.*unaffected
LinuxLinux6.18.8 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References