CVE-2024-47678: Linux Kernel vulnerability (CVSS 9.4)

Description

In the Linux kernel, the following vulnerability has been resolved: icmp: change the order of rate limits ICMP messages are ratelimited : After the blamed commits, the two rate limiters are applied in this order: 1) host wide ratelimit (icmp_global_allow()) 2) Per destination ratelimit (inetpeer based) In order to avoid side-channels attacks, we need to apply the per destination check first. This patch makes the following change : 1) icmp_global_allow() checks if the host wide limit is reached. But credits are not yet consumed. This is deferred to 3) 2) The per destination limit is checked/updated. This might add a new node in inetpeer tree. 3) icmp_global_consume() consumes tokens if prior operations succeeded. This means that host wide ratelimit is still effective in keeping inetpeer tree small even under DDOS. As a bonus, I removed icmp_global.lock as the fast path can use a lock-free operation.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected products

Linux Kernel≥ 3.18 < 6.1.113 · ≥ 6.11 < 6.11.2 · ≥ 6.2 < 6.6.54 · ≥ 6.7 < 6.10.13

Remediation

Fixed in

Linux Kernel≥ 6.1.113

Patch & vendor advisories

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2024-47678 being actively exploited?

CVE-2024-47678 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.61%.

How severe is CVE-2024-47678?

CVE-2024-47678 has a CVSS 3.1 base score of 9.4, rated critical. EPSS estimates a 0.61% probability of exploitation.

Which products are affected by CVE-2024-47678?

Affected products include Linux Kernel.

How do I fix CVE-2024-47678?

Upgrade affected software to a fixed version, for example Linux Kernel 6.1.113 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-47678 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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