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CVE-2023-53382

Critical Vulnerability: CVE-2023-53382 — linux — linux_kernel

In the Linux kernel, the following vulnerability has been resolved: net/smc: Reset connection when trying to use SMCRv2 fails. We found a crash when using SMCRv2 with 2 Mellanox ConnectX-4. It can be reproduced by: - smc_run nginx - smc_run wrk -t 32 -c 500 -d 30 http://<ip>:<port> BUG: kernel NULL pointer dereference, address: 0000000000000014 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 8000000108713067 P4D 8000000108713067 PUD 151127067 PMD

Tuesday, August 4, 2026linuxVulnios Threat Intelligence
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Vulnerability Snapshot

CVE-2023-53382 is rated CRITICAL — exploitation is trivial or already observed in the wild and impact is severe. Patch immediately, not on the next maintenance window.

Affected technology: linux_kernel.

Executive Summary

In the Linux kernel, the following vulnerability has been resolved:

net/smc: Reset connection when trying to use SMCRv2 fails.

We found a crash when using SMCRv2 with 2 Mellanox ConnectX-4. It

can be reproduced by:

  • smc_run nginx
  • smc_run wrk -t 32 -c 500 -d 30 http://:

    • BUG: kernel NULL pointer dereference, address: 0000000000000014

    #PF: supervisor read access in kernel mode

    #PF: error_code(0x0000) - not-present page

    PGD 8000000108713067 P4D 8000000108713067 PUD 151127067 PMD 0

    Oops: 0000 [#1] PREEMPT SMP PTI

    CPU: 4 PID: 2441 Comm: kworker/4:249 Kdump: loaded Tainted: G W E 6.4.0-rc1+ #42

    Workqueue: smc_hs_wq smc_listen_work [smc]

    RIP: 0010:smc_clc_send_confirm_accept+0x284/0x580 [smc]

    RSP: 0018:ffffb8294b2d7c78 EFLAGS: 00010a06

    RAX: ffff8f1873238880 RBX: ffffb8294b2d7dc8 RCX: 0000000000000000

    RDX: 00000000000000b4 RSI: 0000000000000001 RDI: 0000000000b40c00

    RBP: ffffb8294b2d7db8 R08: ffff8f1815c5860c R09: 0000000000000000

    R10: 000000000000040

    Why It Matters

    CVE-2023-53382 is rated CRITICAL severity, requiring immediate attention from security teams.

    CVSS Base Score: 9.8/10

    Affected Technologies

    Vendors: linux

    Products: linux_kernel

    🛡️What Defenders Should Check

  • Check if you are affected — Review your asset inventory for products listed in CVE-2023-53382.
  • Apply available patches — Visit vendor advisories for the latest security updates.
  • Monitor for exploitation — Check your SIEM/IDS logs for related indicators.

    • Use Vulnios to continuously monitor your exposure to CVE-2023-53382 and similar vulnerabilities.

    References & Sources

  • https://git.kernel.org/stable/c/35112271672ae98f45df7875244a4e33aa215e31
  • https://git.kernel.org/stable/c/9540765d1882d15497d880096de99fafabcfa08c
  • https://git.kernel.org/stable/c/d33be18917ffe69865dfed18b0a67b0dee0b47d7

    • How Vulnios Detects This

    Vulnios scans for this vulnerability using Trivy and Grype for CVE matching against your container images and OS package manifests. Run a scan against your environment to see whether you are exposed; findings are linked back to the original CVE record so triage starts with the patch path already known.

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    Affected Products

    linux_kernel

    Sources

    Related Threat Alerts

    Frequently Asked Questions

    What is CVE-2023-53382?

    CVE-2023-53382 is a critical-severity vulnerability tracked under the Common Vulnerabilities and Exposures program. In the Linux kernel, the following vulnerability has been resolved:

    net/smc: Reset connection when trying to use SMCRv2 fails.

    We found a crash when using SMCRv2 with 2 Mellanox ConnectX-4. It

    can b

    Am I affected?

    Check whether your environment runs linux_kernel. If you operate any of those, treat yourself as in scope until you have evidence otherwise. A Vulnios scan will identify the exact assets carrying the affected version.

    How urgent is the response?

    Critical: do not wait for your normal patch cycle. Verify exposure today, apply the vendor patch immediately, and add detection rules for any post-exploit indicators.

    How do I remediate?

    Apply the vendor patch listed in the upstream advisory linked under Sources. If the patch is not yet available, follow the vendor-supplied workaround (often a config flag or feature disable) and add detections for the published exploit pattern in your SIEM. Re-scan after the patch lands to confirm the finding clears.

    Where can I track exploitation activity?

    Watch CISA's Known Exploited Vulnerabilities catalog for CVE-2023-53382. Cross-reference with public exploit databases and your own SIEM/IDS for indicator-of-compromise patterns. Vulnios tracks KEV status automatically and surfaces it on the asset findings view.

    How does Vulnios help with this?

    Vulnios continuously cross-references your asset inventory against the live CVE feed (NVD, vendor advisories, CISA KEV, and curated OSINT). When a new CVE matches your environment, you get a prioritized finding with the severity, KEV status, exploit-prediction (EPSS), and a direct path to the vendor patch. You can start a free scan from the homepage.

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