In the Linux kernel, the following vulnerability has been resolved:
net: rds: fix memory leak in rds_recvmsg
Syzbot reported memory leak in rds. The problem
was in unputted refcount in case of error.
int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
int msg_flags)
{
...
if (!rds_next_incoming(rs, &inc)) {
...
}
After this "if" inc refcount incremented and
if (rds_cmsg_recv(inc, msg, rs)) {
ret = -EFAULT;
goto out;
}
...
out:
return ret;
}
in case of rds_cmsg_recv() fail the refcount won't be
decremented. And it's easy to see from ftrace log, that
rds_inc_addref() don't have rds_inc_put() pair in
rds_recvmsg() after rds_cmsg_recv()
1) | rds_recvmsg() {
1) 3.721 us | rds_inc_addref();
1) 3.853 us | rds_message_inc_copy_to_user();
1) + 10.395 us | rds_cmsg_recv();
1) + 34.260 us | }
References
Configurations
Configuration 1 (hide)
|
History
30 Dec 2024, 19:01
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/06b7cb0194bd1ede0dd27f3a946e7c0279fba44a - Patch | |
| References | () https://git.kernel.org/stable/c/1f79bc8ae81c05eb112a53f981cb2c244ee50d02 - Patch | |
| References | () https://git.kernel.org/stable/c/2038cd15eacdf7512755c27686822e0052eb9042 - Patch | |
| References | () https://git.kernel.org/stable/c/423c6939758fb3b9cf5abbd1e7792068a5c4ae8c - Patch | |
| References | () https://git.kernel.org/stable/c/49bfcbfd989a8f1f23e705759a6bb099de2cff9f - Patch | |
| References | () https://git.kernel.org/stable/c/5946fbf48355f5a8caeff72580c7658da5966b86 - Patch | |
| References | () https://git.kernel.org/stable/c/8c3ec88b03e9e4ca117dcdc4204fd3edcd02084f - Patch | |
| References | () https://git.kernel.org/stable/c/b25b60d076164edb3025e85aabd2cf50a5215b91 - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-401 |
Information
Published : 2024-05-21 15:15
Updated : 2024-12-30 19:01
NVD link : CVE-2021-47249
Mitre link : CVE-2021-47249
CVE.ORG link : CVE-2021-47249
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-401
Missing Release of Memory after Effective Lifetime