CVE - CVE-2024-56638

CVE-ID
CVE-2024-56638	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_inner: incorrect percpu area handling under softirq Softirq can interrupt ongoing packet from process context that is walking over the percpu area that contains inner header offsets. Disable bh and perform three checks before restoring the percpu inner header offsets to validate that the percpu area is valid for this skbuff: 1) If the NFT_PKTINFO_INNER_FULL flag is set on, then this skbuff has already been parsed before for inner header fetching to register. 2) Validate that the percpu area refers to this skbuff using the skbuff pointer as a cookie. If there is a cookie mismatch, then this skbuff needs to be parsed again. 3) Finally, validate if the percpu area refers to this tunnel type. Only after these three checks the percpu area is restored to a on-stack copy and bh is enabled again. After inner header fetching, the on-stack copy is stored back to the percpu area.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/53c7314208c865086d78b4e88da53bc33da0b603 URL:https://git.kernel.org/stable/c/53c7314208c865086d78b4e88da53bc33da0b603 MISC:https://git.kernel.org/stable/c/7b1d83da254be3bf054965c8f3b1ad976f460ae5 URL:https://git.kernel.org/stable/c/7b1d83da254be3bf054965c8f3b1ad976f460ae5 MISC:https://git.kernel.org/stable/c/da5cc778e7bf78fe525bc90ec2043f41415c31d9 URL:https://git.kernel.org/stable/c/da5cc778e7bf78fe525bc90ec2043f41415c31d9
Assigning CNA
kernel.org
Date Record Created
20241227	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241227)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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