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.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Linux |
|
Configuration 1 [-]
|
No data.
References
History
Thu, 17 Apr 2025 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
|
ssvc
|
Thu, 13 Feb 2025 00:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
threat_severity
|
threat_severity
|
Mon, 06 Jan 2025 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Linux
Linux linux Kernel |
|
| Weaknesses | CWE-401 | |
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:* |
|
| Vendors & Products |
Linux
Linux linux Kernel |
Tue, 31 Dec 2024 02:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
| |
| Metrics |
threat_severity
|
cvssV3_1
|
Fri, 27 Dec 2024 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | dccp: Fix memory leak in dccp_feat_change_recv | |
| References |
|
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-04-17T20:15:52.853Z
Reserved: 2024-12-27T15:00:39.840Z
Link: CVE-2024-56643
Vulnrichment
Updated: 2025-04-17T20:10:39.828Z
NVD
Status : Modified
Published: 2024-12-27T15:15:24.040
Modified: 2025-04-17T21:15:49.070
Link: CVE-2024-56643
Redhat