CVE - CVE-2023-52483

CVE-ID
CVE-2023-52483	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: mctp: perform route lookups under a RCU read-side lock Our current route lookups (mctp_route_lookup and mctp_route_lookup_null) traverse the net's route list without the RCU read lock held. This means the route lookup is subject to preemption, resulting in an potential grace period expiry, and so an eventual kfree() while we still have the route pointer. Add the proper read-side critical section locks around the route lookups, preventing premption and a possible parallel kfree. The remaining net->mctp.routes accesses are already under a rcu_read_lock, or protected by the RTNL for updates. Based on an analysis from Sili Luo <rootlab@huawei.com>, where introducing a delay in the route lookup could cause a UAF on simultaneous sendmsg() and route deletion.
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/1db0724a01b558feb1ecae551782add1951a114a URL:https://git.kernel.org/stable/c/1db0724a01b558feb1ecae551782add1951a114a MISC:https://git.kernel.org/stable/c/2405f64a95a7a094eb24cba9bcfaffd1ea264de4 URL:https://git.kernel.org/stable/c/2405f64a95a7a094eb24cba9bcfaffd1ea264de4 MISC:https://git.kernel.org/stable/c/5093bbfc10ab6636b32728e35813cbd79feb063c URL:https://git.kernel.org/stable/c/5093bbfc10ab6636b32728e35813cbd79feb063c MISC:https://git.kernel.org/stable/c/6c52b12159049046483fdb0c411a0a1869c41a67 URL:https://git.kernel.org/stable/c/6c52b12159049046483fdb0c411a0a1869c41a67
Assigning CNA
kernel.org
Date Record Created
20240220	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 (20240220)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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