What’s Vulnerable › Vulnerabilities

CVE-2023-52974: scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-27 · updated 2026-06-17
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress If during iscsi_sw_tcp_session_create() iscsi_tcp_r2tpool_alloc() fails, userspace could be accessing the host's ipaddress attr. If we then free the session via iscsi_session_teardown() while userspace is still accessing the session we will hit a use after free bug. Set the tcp_sw_host->session after we have completed session creation and can no longer fail.

Affected products

• Linux kernel: before 4.14.306; from 4.15 before 4.19.273; from 4.20 before 5.4.232; from 5.5 before 5.10.168; from 5.11 before 5.15.93; from 5.16 before 6.1.11 — fixed in 4.14.306, 4.19.273, 5.10.168, 5.15.93, 5.4.232, 6.1.11

How to fix

Upgrade to a fixed version: Linux kernel 4.14.306, 4.19.273, 5.10.168, 5.15.93. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0aaabdb900c7415caa2006ef580322f7eac5f6b6
• https://git.kernel.org/stable/c/496af9d3682ed4c28fb734342a09e6cc0c056ea4
• https://git.kernel.org/stable/c/61e43ebfd243bcbad11be26bd921723027b77441
• https://git.kernel.org/stable/c/6abd4698f4c8a78e7bbfc421205c060c199554a0
• https://git.kernel.org/stable/c/9758ffe1c07b86aefd7ca8e40d9a461293427ca0
• https://git.kernel.org/stable/c/d4d765f4761f9e3a2d62992f825aeee593bcb6b9
• https://git.kernel.org/stable/c/f484a794e4ee2a9ce61f52a78e810ac45f3fe3b3

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