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CVE PROGRAM SOURCE RECORD3.3 Low

CVE-2024-56643

dccp: Fix memory leak in dccp_feat_change_recv

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: dccp: Fix memory leak in dccp_feat_change_recv If dccp_feat_push_confirm() fails after new value for SP feature was accepted without reconciliation ('entry == NULL' branch), memory allocated for that value with dccp_feat_clone_sp_val() is never freed. Here is the kmemleak stack for this: unreferenced object 0xffff88801d4ab488 (size 8): comm "syz-executor310", pid 1127, jiffies 4295085598 (age 41.666s) hex dump (first 8 bytes): 01 b4 4a 1d 80 88 ff ff ..J..... backtrace: [<00000000db7cabfe>] kmemdup+0x23/0x50 mm/util.c:128 [<0000000019b38405>] kmemdup include/linux/string.h:465 [inline] [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:371 [inline] [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:367 [inline] [<0000000019b38405>] dccp_feat_change_recv net/dccp/feat.c:1145 [inline] [<0000000019b38405>] dccp_feat_parse_options+0x1196/0x2180 net/dccp/feat.c:1416 [<00000000b1f6d94a>] dccp_parse_options+0xa2a/0x1260 net/dccp/options.c:125 [<0000000030d7b621>] dccp_rcv_state_process+0x197/0x13d0 net/dccp/input.c:650 [<000000001f74c72e>] dccp_v4_do_rcv+0xf9/0x1a0 net/dccp/ipv4.c:688 [<00000000a6c24128>] sk_backlog_rcv include/net/sock.h:1041 [inline] [<00000000a6c24128>] __release_sock+0x139/0x3b0 net/core/sock.c:2570 [<00000000cf1f3a53>] release_sock+0x54/0x1b0 net/core/sock.c:3111 [<000000008422fa23>] inet_wait_for_connect net/ipv4/af_inet.c:603 [inline] [<000000008422fa23>] __inet_stream_connect+0x5d0/0xf70 net/ipv4/af_inet.c:696 [<0000000015b6f64d>] inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:735 [<0000000010122488>] __sys_connect_file+0x15c/0x1a0 net/socket.c:1865 [<00000000b4b70023>] __sys_connect+0x165/0x1a0 net/socket.c:1882 [<00000000f4cb3815>] __do_sys_connect net/socket.c:1892 [inline] [<00000000f4cb3815>] __se_sys_connect net/socket.c:1889 [inline] [<00000000f4cb3815>] __x64_sys_connect+0x6e/0xb0 net/socket.c:1889 [<00000000e7b1e839>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<0000000055e91434>] entry_SYSCALL_64_after_hwframe+0x67/0xd1 Clean up the allocated memory in case of dccp_feat_push_confirm() failure and bail out with an error reset code. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

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

  • e77b8363b2ea7c0d89919547c1a8b0562f298b57 to < 623be080ab3c13d71570bd32f7202a8efa8e2252affected
  • e77b8363b2ea7c0d89919547c1a8b0562f298b57 to < c99507fff94b926fc92279c92d80f229c91cb85daffected
  • e77b8363b2ea7c0d89919547c1a8b0562f298b57 to < bc3d4423def1a9412a0ae454cb4477089ab79276affected
  • e77b8363b2ea7c0d89919547c1a8b0562f298b57 to < 6ff67909ee2ffad911e3122616df41dee23ff4f6affected
  • e77b8363b2ea7c0d89919547c1a8b0562f298b57 to < d3ec686a369fae5034303061f003cd3f94ddfd23affected
  • e77b8363b2ea7c0d89919547c1a8b0562f298b57 to < 9ee68b0f23706a77f53c832457b9384178b76421affected
  • e77b8363b2ea7c0d89919547c1a8b0562f298b57 to < 22be4727a8f898442066bcac34f8a1ad0bc72e14affected

Linux Linux

Default version status: affected

  • 2.6.29affected
  • 0 to < 2.6.29unaffected
  • 5.4.287 to ≤ 5.4.*unaffected
  • 5.10.231 to ≤ 5.10.*unaffected
  • 5.15.174 to ≤ 5.15.*unaffected
  • 6.1.120 to ≤ 6.1.*unaffected
  • 6.6.66 to ≤ 6.6.*unaffected
  • 6.12.5 to ≤ 6.12.*unaffected
  • 6.13 to ≤ *unaffected

References