CVE-2024-56641: net/smc: initialize close_work early to avoid warning
CSIRTS triage
- What
- The SMC (Shared Memory Communication) protocol driver fails to initialize close_work early, triggering a warning.
- Who is affected
- Systems using SMC networking in affected kernel versions.
- Urgency
- Medium severity; not exploited but indicates improper resource initialization.
- Action
- Apply Linux kernel security patch addressing CVE-2024-56641.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-56641
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2024-566410.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2024-56641 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for net/smc
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- unknownCVE-2026-74719: In the Linux kernel, the following vulnerability has been resolved: net/smc: fix qentry overwr…nvd · 2026-08-22
- highCVE-2026-74692: In the Linux kernel, the following vulnerability has been resolved: net/smc: fix TOCTOU race b…nvd · 2026-08-22
- criticalCVE-2026-74493: In the Linux kernel, the following vulnerability has been resolved: net/smc: fix socket use-af…nvd · 2026-08-15
- lowCVE-2026-74719: net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()msrc · 2026-08-11
- mediumCVE-2026-74692: net/smc: fix TOCTOU race between smc_listen_out() and listener closemsrc · 2026-08-11
- mediumCVE-2026-74493: net/smc: fix socket use-after-free during link group terminationmsrc · 2026-08-11
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