CVE-2023-53033

netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits If the offset + length goes over the ethernet + vlan header, then the length is adjusted to copy the bytes that are within the boundaries of the vlan_ethhdr scratchpad area. The remaining bytes beyond ethernet + vlan header are copied directly from the skbuff data area. Fix incorrect arithmetic operator: subtract, not add, the size of the vlan header in case of double-tagged packets to adjust the length accordingly to address CVE-2023-0179.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/550efeff989b041f3746118c0ddd863c39ddc1aa
https://git.kernel.org/stable/c/a8acfe2c6fb99f9375a9325807a179cd8c32e6e3
https://git.kernel.org/stable/c/76ef74d4a379faa451003621a84e3498044e7aa3
https://git.kernel.org/stable/c/696e1a48b1a1b01edad542a1ef293665864a4dd0

Frequently Asked Questions

What is the severity of CVE-2023-53033?: CVE-2023-53033 has not yet been assigned a CVSS score.
How to fix CVE-2023-53033?: To fix CVE-2023-53033, 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-2023-53033 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-53033 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-2023-53033?: CVE-2023-53033 affects Linux Linux, Linux Linux.

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