{"id":"CVE-2026-68289","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix integer overflow in tipc_recvmsg() and tipc_recvstream()\n\nIn tipc_recvmsg(), the copy length is computed as:\n\n  copy = min_t(int, dlen - offset, buflen);\n\nbuf…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix integer overflow in tipc_recvmsg() and tipc_recvstream()\n\nIn tipc_recvmsg(), the copy length is computed as:\n\n  copy = min_t(int, dlen - offset, buflen);\n\nbuf…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= e9f8b10101c6da3ab000a2fb17162374c9bd2c69 < 1b6066313b9b8fac870483bf7a26d6bd56579747","Linux >= e9f8b10101c6da3ab000a2fb17162374c9bd2c69 < 7364014fdc289225229eb08de8bcbf4580e78e4d","Linux >= e9f8b10101c6da3ab000a2fb17162374c9bd2c69 < fe9bf32bb18f2d35789d4960fb007d1059bbaa38","Linux >= e9f8b10101c6da3ab000a2fb17162374c9bd2c69 < 47f42ff521b4eeb46e82f9a46a4783a99f7570d7","Linux 4.12"],"published":"2026-08-10","updated":"2026-09-21","sourceUpdated":"2026-09-21T14:17:16.603","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-68289","references":[{"url":"https://git.kernel.org/stable/c/1b6066313b9b8fac870483bf7a26d6bd56579747","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/47f42ff521b4eeb46e82f9a46a4783a99f7570d7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7364014fdc289225229eb08de8bcbf4580e78e4d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fe9bf32bb18f2d35789d4960fb007d1059bbaa38","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00175,"epssPercentile":0.07325,"ingestedAt":"2026-09-21T13:37:22.845Z","slug":"CVE-2026-68289","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix integer overflow in tipc_recvmsg() and tipc_recvstream()\n\nIn tipc_recvmsg(), the copy length is computed as:\n\n  copy = min_t(int, dlen - offset, buflen);\n\nbuflen is size_t but min_t(int, ...) casts it to int. When buflen\nexceeds INT_MAX (e.g. 0xFFFFFFFF via io_uring provided buffers), it\nwraps negative, wins the comparison, and the negative copy length\npropagates to simple_copy_to_iter() where int-to-size_t promotion\nmakes it SIZE_MAX, triggering a WARN_ON. tipc_recvstream() has the\nsame pattern.\n\n  Kernel panic - not syncing: kernel: panic_on_warn set ...\n  RIP: 0010:simple_copy_to_iter+0x9e/0xd0 (net/core/datagram.c:521)\n  Call Trace:\n   __skb_datagram_iter+0x123/0x8b0 (net/core/datagram.c:402)\n   skb_copy_datagram_iter+0x77/0x1a0 (net/core/datagram.c:534)\n   tipc_recvmsg+0x3d7/0xe80 (net/tipc/socket.c:1934)\n   io_recvmsg+0x47e/0xda0\n\nFix by changing min_t(int, ...) to min_t(size_t, ...) in both\nfunctions. The result is always <= (dlen - offset), which is bounded\nby TIPC maximum message size (0x1ffff bytes), so the implicit\nnarrowing on assignment to int copy is always safe.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}