CVE-2024-38662

bpf: Allow delete from sockmap/sockhash only if update is allowed

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Allow delete from sockmap/sockhash only if update is allowed We have seen an influx of syzkaller reports where a BPF program attached to a tracepoint triggers a locking rule violation by performing a map_delete on a sockmap/sockhash. We don't intend to support this artificial use scenario. Extend the existing verifier allowed-program-type check for updating sockmap/sockhash to also cover deleting from a map. From now on only BPF programs which were previously allowed to update sockmap/sockhash can delete from these map types.

4.7

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.05%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/29467edc23818dc5a33042ffb4920b49b090e63d	mailing list patch
https://git.kernel.org/stable/c/11e8ecc5b86037fec43d07b1c162e233e131b1d9	mailing list patch
https://git.kernel.org/stable/c/6693b172f008846811f48a099f33effc26068e1e	mailing list patch
https://git.kernel.org/stable/c/000a65bf1dc04fb2b65e2abf116f0bc0fc2ee7b1	mailing list patch
https://git.kernel.org/stable/c/b81e1c5a3c70398cf76631ede63a03616ed1ba3c	mailing list patch
https://git.kernel.org/stable/c/98e948fb60d41447fd8d2d0c3b8637fc6b6dc26d	mailing list patch

Frequently Asked Questions

What is the severity of CVE-2024-38662?: CVE-2024-38662 has been scored as a medium severity vulnerability.
How to fix CVE-2024-38662?: To fix CVE-2024-38662, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-38662 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-38662 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-38662?: CVE-2024-38662 affects Linux Linux, Linux Linux.

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