Unknown
CVE-2021-47249
CVE ID
AttackerKB requires a CVE ID in order to pull vulnerability data and references from the CVE list and the National Vulnerability Database. If available, please supply below:
Add References:
CVE-2021-47249
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
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()
- | rds_recvmsg() {
- 3.721 us | rds_inc_addref();
- 3.853 us | rds_message_inc_copy_to_user();
- + 10.395 us | rds_cmsg_recv();
- + 34.260 us | }
Add Assessment
No one has assessed this topic. Be the first to add your voice to the community.
CVSS V3 Severity and Metrics
General Information
Vendors
Products
References
Miscellaneous
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Zero-day Exploit
Report as Exploited in the Wild
CVE ID
AttackerKB requires a CVE ID in order to pull vulnerability data and references from the CVE list and the National Vulnerability Database. If available, please supply below:
