CVE-2024-57841: net: fix memory leak in tcp_conn_request()
In the Linux kernel, the following vulnerability has been resolved:
net: fix memory leak in tcpconnrequest()
If inetcskreqskqueuehashadd() return false, tcpconnrequest() will return without free the dst memory, which allocated in afops->routereq.
Here is the kmemleak stack:
unreferenced object 0xffff8881198631c0 (size 240): comm "softirq", pid 0, jiffies 4299266571 (age 1802.392s) hex dump (first 32 bytes): 00 10 9b 03 81 88 ff ff 80 98 da bc ff ff ff ff ................ 81 55 18 bb ff ff ff ff 00 00 00 00 00 00 00 00 .U.............. backtrace: [<ffffffffb93e8d4c>] kmemcachealloc+0x60c/0xa80 [<ffffffffba11b4c5>] dstalloc+0x55/0x250 [<ffffffffba227bf6>] rtdstalloc+0x46/0x1d0 [<ffffffffba23050a>] mkrouteoutput+0x29a/0xa50 [<ffffffffba23456b>] iprouteoutputkeyhash+0x10b/0x240 [<ffffffffba2346bd>] iprouteoutputflow+0x1d/0x90 [<ffffffffba254855>] inetcskroutereq+0x2c5/0x500 [<ffffffffba26b331>] tcpconnrequest+0x691/0x12c0 [<ffffffffba27bd08>] tcprcvstateprocess+0x3c8/0x11b0 [<ffffffffba2965c6>] tcpv4dorcv+0x156/0x3b0 [<ffffffffba299c98>] tcpv4rcv+0x1cf8/0x1d80 [<ffffffffba239656>] ipprotocoldeliverrcu+0xf6/0x360 [<ffffffffba2399a6>] iplocaldeliverfinish+0xe6/0x1e0 [<ffffffffba239b8e>] iplocaldeliver+0xee/0x360 [<ffffffffba239ead>] iprcv+0xad/0x2f0 [<ffffffffba110943>] netifreceiveskbonecore+0x123/0x140
Call dstrelease() to free the dst memory when inetcskreqskqueuehashadd() return false in tcpconnrequest().
Other sources
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— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.27-1 - Upgrade
Upgrade
debian/linux-6.1to a version that resolves this vulnerability.Fixed in 6.1.129-1~deb11u1 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.76.1-1 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 5.15.176.3-1
Event History
Frequently Asked Questions
What is the severity of CVE-2024-57841?
The severity of CVE-2024-57841 is typically assessed as moderate due to its potential for causing a memory leak in the Linux kernel.
How do I fix CVE-2024-57841?
To fix CVE-2024-57841, it is recommended to apply the patches provided in the latest Linux kernel updates.
Which versions of the Linux kernel are affected by CVE-2024-57841?
CVE-2024-57841 affects multiple versions of the Linux kernel, including versions between 5.15.162 to 5.15.176, 6.1.97 to 6.1.124, and several others.
What does CVE-2024-57841 impact?
CVE-2024-57841 impacts the Linux kernel's networking subsystem, specifically related to TCP connection requests.
Is CVE-2024-57841 publicly known?
Yes, CVE-2024-57841 is a publicly disclosed vulnerability tracked in the CVE database.