What’s Vulnerable › Vulnerabilities

CVE-2024-49568: net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving proposal msg

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-01-11 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving proposal msg When receiving proposal msg in server, the fields v2_ext_offset/ eid_cnt/ism_gid_cnt in proposal msg are from the remote client and can not be fully trusted. Especially the field v2_ext_offset, once exceed the max value, there has the chance to access wrong address, and crash may happen. This patch checks the fields v2_ext_offset/eid_cnt/ism_gid_cnt before using them.

Affected products

• Linux kernel: from 5.10 before 6.6.68; from 6.7 before 6.12.7; 6.13-rc1, 6.13-rc2, 6.13-rc3 — fixed in 6.12.7, 6.6.68

How to fix

Upgrade to a fixed version: Linux kernel 6.12.7, 6.6.68. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/295a92e3df32e72aff0f4bc25c310e349d07ffbf
• https://git.kernel.org/stable/c/42f6beb2d5779429417b5f8115a4e3fa695d2a6c
• https://git.kernel.org/stable/c/49798283fce4c1a24fb1ba4c7c39127739535571
• https://git.kernel.org/stable/c/690b9a8db9460d065785548e43fd6a02d247c1b7
• https://git.kernel.org/stable/c/7863c9f3d24ba49dbead7e03dfbe40deb5888fdf
• https://git.kernel.org/stable/c/9cc0170ae646876aa5de2f0cad3066ce53e86f27

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