CVE-2023-4459: Kernel: vmxnet3: null pointer dereference in vmxnet3_rq_cleanup()
First published: Mon Jul 03 2023(Updated: )
A NULL pointer dereference flaw was found in vmxnet3_rq_cleanup in drivers/net/vmxnet3/vmxnet3_drv.c in networking sub-component in vmxnet3 in the Linux Kernel. In this flaw a local attacker with normal user privilege may lead to a denial of service problem due to a missing sanity check while cleanup. In vmxnet3_rq_create(), when dma_alloc_coherent() fails, vmxnet3_rq_destroy() is called. It sets rq->rx_ring[i].base to NULL. Then vmxnet3_rq_create() returns an error to its callers mxnet3_rq_create_all() -> vmxnet3_change_mtu(). Then vmxnet3_change_mtu() calls vmxnet3_force_close() -> dev_close() in error handling code. And the driver calls vmxnet3_close() -> vmxnet3_quiesce_dev() -> vmxnet3_rq_cleanup_all() -> vmxnet3_rq_cleanup(). In vmxnet3_rq_cleanup(), rq->rx_ring[ring_idx].base is accessed, but this variable is NULL, causing a NULL pointer dereference. References: <a href="https://github.com/torvalds/linux/commit/edf410cb74dc612fd47ef5be319c5a0bcd6e6ccd">https://github.com/torvalds/linux/commit/edf410cb74dc612fd47ef5be319c5a0bcd6e6ccd</a>
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.18 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 | |
| redhat/Kernel | <5.18 | 5.18 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.6-1 6.12.9-1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2023-4459
- https://bugzilla.redhat.com/show_bug.cgi?id=2219268
- https://github.com/torvalds/linux/commit/edf410cb74dc612fd47ef5be319c5a0bcd6e6ccd
- https://access.redhat.com/errata/RHSA-2024:0412
- https://access.redhat.com/errata/RHSA-2024:1250
- https://access.redhat.com/errata/RHSA-2024:1306
- https://access.redhat.com/errata/RHSA-2024:1367
- https://access.redhat.com/errata/RHSA-2024:1382
- https://access.redhat.com/errata/RHSA-2024:2006
- https://access.redhat.com/errata/RHSA-2024:2008
- https://launchpad.net/bugs/cve/CVE-2023-4459
- https://git.kernel.org/linus/edf410cb74dc612fd47ef5be319c5a0bcd6e6ccd
- https://security-tracker.debian.org/tracker/CVE-2023-4459
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4459
- https://nvd.nist.gov/vuln/detail/CVE-2023-4459
- https://ubuntu.com/security/CVE-2023-4459
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