CVE - CVE-2024-45016

CVE-ID
CVE-2024-45016	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: netem: fix return value if duplicate enqueue fails There is a bug in netem_enqueue() introduced by commit 5845f706388a ("net: netem: fix skb length BUG_ON in __skb_to_sgvec") that can lead to a use-after-free. This commit made netem_enqueue() always return NET_XMIT_SUCCESS when a packet is duplicated, which can cause the parent qdisc's q.qlen to be mistakenly incremented. When this happens qlen_notify() may be skipped on the parent during destruction, leaving a dangling pointer for some classful qdiscs like DRR. There are two ways for the bug happen: - If the duplicated packet is dropped by rootq->enqueue() and then the original packet is also dropped. - If rootq->enqueue() sends the duplicated packet to a different qdisc and the original packet is dropped. In both cases NET_XMIT_SUCCESS is returned even though no packets are enqueued at the netem qdisc. The fix is to defer the enqueue of the duplicate packet until after the original packet has been guaranteed to return NET_XMIT_SUCCESS.
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/0486d31dd8198e22b63a4730244b38fffce6d469 URL:https://git.kernel.org/stable/c/0486d31dd8198e22b63a4730244b38fffce6d469 MISC:https://git.kernel.org/stable/c/52d99a69f3d556c6426048c9d481b912205919d8 URL:https://git.kernel.org/stable/c/52d99a69f3d556c6426048c9d481b912205919d8 MISC:https://git.kernel.org/stable/c/577d6c0619467fe90f7e8e57e45cb5bd9d936014 URL:https://git.kernel.org/stable/c/577d6c0619467fe90f7e8e57e45cb5bd9d936014 MISC:https://git.kernel.org/stable/c/759e3e8c4a6a6b4e52ebc4547123a457f0ce90d4 URL:https://git.kernel.org/stable/c/759e3e8c4a6a6b4e52ebc4547123a457f0ce90d4 MISC:https://git.kernel.org/stable/c/c07ff8592d57ed258afee5a5e04991a48dbaf382 URL:https://git.kernel.org/stable/c/c07ff8592d57ed258afee5a5e04991a48dbaf382 MISC:https://git.kernel.org/stable/c/c414000da1c2ea1ba9a5e5bb1a4ba774e51e202d URL:https://git.kernel.org/stable/c/c414000da1c2ea1ba9a5e5bb1a4ba774e51e202d MISC:https://git.kernel.org/stable/c/e5bb2988a310667abed66c7d3ffa28880cf0f883 URL:https://git.kernel.org/stable/c/e5bb2988a310667abed66c7d3ffa28880cf0f883
Assigning CNA
kernel.org
Date Record Created
20240821	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 (20240821)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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