CVE-2024-35894

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-35894
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35894.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-35894
Related
Published
2024-05-19T09:15:10Z
Modified
2024-09-18T03:26:19.145308Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

mptcp: prevent BPF accessing lowat from a subflow socket.

Alexei reported the following splat:

WARNING: CPU: 32 PID: 3276 at net/mptcp/subflow.c:1430 subflowdataready+0x147/0x1c0 Modules linked in: dummy bpftestmod(O) [last unloaded: bpftestnocfi(O)] CPU: 32 PID: 3276 Comm: testprogs Tainted: GO 6.8.0-12873-g2c43c33bfd23 Call Trace: <TASK> mptcpsetrcvlowat+0x79/0x1d0 sksetsockopt+0x6c0/0x1540 _bpfsetsockopt+0x6f/0x90 bpfsockopssetsockopt+0x3c/0x90 bpfprog509ce5db2c7f9981bpftestsockoptint+0xb4/0x11b bpfprogdce07e362d941d2bbpftestsocketsockopt+0x12b/0x132 bpfprog348c9b5faaf10092skopssockopt+0x954/0xe86 _cgroupbpfrunfiltersockops+0xbc/0x250 tcpconnect+0x879/0x1160 tcpv6connect+0x50c/0x870 mptcpconnect+0x129/0x280 _inetstreamconnect+0xce/0x370 inetstreamconnect+0x36/0x50 bpftrampoline6442491565+0x49/0xef inetstreamconnect+0x5/0x50 _sysconnect+0x63/0x90 _x64sys_connect+0x14/0x20

The root cause of the issue is that bpf allows accessing mptcp-level proto_ops from a tcp subflow scope.

Fix the issue detecting the problematic call and preventing any action.

References

Affected packages

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.8.9-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
6.1.106-1
6.1.106-2
6.1.106-3
6.3.1-1~exp1
6.3.2-1~exp1
6.3.4-1~exp1
6.3.5-1~exp1
6.3.7-1~bpo12+1
6.3.7-1
6.3.11-1
6.4~rc6-1~exp1
6.4~rc7-1~exp1
6.4.1-1~exp1
6.4.4-1~bpo12+1
6.4.4-1
6.4.4-2
6.4.4-3~bpo12+1
6.4.4-3
6.4.11-1
6.4.13-1
6.5~rc4-1~exp1
6.5~rc6-1~exp1
6.5~rc7-1~exp1
6.5.1-1~exp1
6.5.3-1~bpo12+1
6.5.3-1
6.5.6-1
6.5.8-1
6.5.10-1~bpo12+1
6.5.10-1
6.5.13-1
6.6.3-1~exp1
6.6.4-1~exp1
6.6.7-1~exp1
6.6.8-1
6.6.9-1
6.6.11-1
6.6.13-1~bpo12+1
6.6.13-1
6.6.15-1
6.6.15-2
6.7-1~exp1
6.7.1-1~exp1
6.7.4-1~exp1
6.7.7-1
6.7.9-1
6.7.9-2
6.7.12-1~bpo12+1
6.7.12-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}