Skip to content
CVE PROGRAM SOURCE RECORD8.2 High

CVE-2026-23456

netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case In decode_int(), the CONS case calls get_bits(bs, 2) to read a length value, then calls get_uint(bs, len) without checking that len bytes remain in the buffer. The existing boundary check only validates the 2 bits for get_bits(), not the subsequent 1-4 bytes that get_uint() reads. This allows a malformed H.323/RAS packet to cause a 1-4 byte slab-out-of-bounds read. Add a boundary check for len bytes after get_bits() and before get_uint().

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

  • 5e35941d990123f155b02d5663e51a24f816b6f3 to < a2cd54b9348e485d338b3c132338a4410c99afafaffected
  • 5e35941d990123f155b02d5663e51a24f816b6f3 to < c95dc674ebf01ecfb40388b6facfc89b81fed3b7affected
  • 5e35941d990123f155b02d5663e51a24f816b6f3 to < 41b417ff73a24b2c68134992cc44c88db27f482daffected
  • 5e35941d990123f155b02d5663e51a24f816b6f3 to < 52235bf88159a1ef16434ab49e47e99c8a09ab20affected
  • 5e35941d990123f155b02d5663e51a24f816b6f3 to < 774a434f8c9c8602a976b2536f65d0172a07f4d2affected
  • 5e35941d990123f155b02d5663e51a24f816b6f3 to < 6bce72daeccca9aa1746e92d6c3d4784e71f2ebbaffected
  • 5e35941d990123f155b02d5663e51a24f816b6f3 to < fb6c3596823ec5dd09c2123340330d7448f51a59affected
  • 5e35941d990123f155b02d5663e51a24f816b6f3 to < 1e3a3593162c96e8a8de48b1e14f60c3b57fca8aaffected

Linux Linux

Default version status: affected

  • 2.6.17affected
  • 0 to < 2.6.17unaffected
  • 5.10.253 to ≤ 5.10.*unaffected
  • 5.15.203 to ≤ 5.15.*unaffected
  • 6.1.167 to ≤ 6.1.*unaffected
  • 6.6.130 to ≤ 6.6.*unaffected
  • 6.12.78 to ≤ 6.12.*unaffected
  • 6.18.20 to ≤ 6.18.*unaffected
  • 6.19.10 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References