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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-64411

netfilter: ebtables: terminate table name before find_table_lock()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ebtables: terminate table name before find_table_lock() update_counters() and compat_update_counters() forward a user-supplied 32-byte table name to find_table_lock() without NUL-terminating it. On a lookup miss, find_inlist_lock() calls try_then_request_module(..., "%s%s", "ebtable_", name), and vsnprintf() reads past the name field and the stack object until it hits a zero byte. BUG: KASAN: stack-out-of-bounds in string (lib/vsprintf.c:648 lib/vsprintf.c:730) Read of size 1 at addr ffff8880119dfb20 by task exploit/147 Call Trace: ... string (lib/vsprintf.c:648 lib/vsprintf.c:730) vsnprintf (lib/vsprintf.c:2945) __request_module (kernel/module/kmod.c:150) do_update_counters.isra.0 (net/bridge/netfilter/ebtables.c:371 net/bridge/netfilter/ebtables.c:380) update_counters (net/bridge/netfilter/ebtables.c:1440) do_ebt_set_ctl (net/bridge/netfilter/ebtables.c:2573) nf_setsockopt (net/netfilter/nf_sockopt.c:101) ip_setsockopt (net/ipv4/ip_sockglue.c:1424) raw_setsockopt (net/ipv4/raw.c:847) __sys_setsockopt (net/socket.c:2393) ... compat_do_replace() shares the same unterminated name via compat_copy_ebt_replace_from_user(); terminate it there too so all find_table_lock() callers behave alike. The other callers already terminate the name after the copy.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 4c046ca4e35a83ea32f6e748f54139f5fe2a1d01affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < ab63ccefb9c71627f957a0724c2b9ebc869c6f20affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < c6f539311e58e76aa96feef0f1572b13a564f8a2affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 2664f537ca5bcb2ef3fac2683dcca602e51fad24affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 7436da6c1bc44654b7f11a17e746f6999fd37250affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 6fe8d3cecd20bfaaaf440db3a06ba674d2f2e322affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < b6183b1b88a722b6d8ea0cecc99eba168a15e0beaffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < a622d2e9608c9dff47fc2e5759ac7aa3a836b45daffected

Linux Linux

Default version status: affected

  • 2.6.12affected
  • 0 to < 2.6.12unaffected
  • 5.10.261 to ≤ 5.10.*unaffected
  • 5.15.212 to ≤ 5.15.*unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.96 to ≤ 6.12.*unaffected
  • 6.18.39 to ≤ 6.18.*unaffected
  • 7.1.4 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References