CVE-2025-38075 scsi: target: iscsi: Fix timeout on deleted connection
A null pointer dereference in the Linux kernel iSCSI target module can cause a system crash when a NOPIN response timer expires on a deleted connection.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-38075?
CVE-2025-38075 is a critical vulnerability in Debian Debian Linux, published on 18 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
scsi: target: iscsi: Fix timeout on deleted connection
NOPIN response timer may expire on a deleted connection and crash with such logs:
Did not receive response to NOPIN on CID: 0, failing connection for I_T Nexus (null),i,0x00023d000125,iqn.2017-01.com.iscsi.target,t,0x3d
BUG: Kernel NULL pointer dereference on read at 0x00000000 NIP strlcpy+0x8/0xb0 LR iscsit_fill_cxn_timeout_err_stats+0x5c/0xc0 [iscsi_target_mod] Call Trace: iscsit_handle_nopin_response_timeout+0xfc/0x120 [iscsi_target_mod] call_timer_fn+0x58/0x1f0 run_timer_softirq+0x740/0x860 __do_softirq+0x16c/0x420 irq_exit+0x188/0x1c0 timer_interrupt+0x184/0x410
That is because nopin response timer may be re-started on nopin timer expiration.
Stop nopin timer before stopping the nopin response timer to be sure that no one of them will be re-started.
Weakness: CWE-476
Which versions are affected by CVE-2025-38075?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-38075?
Apply the vendor's patch.
Is CVE-2025-38075 being exploited?
There is no known exploitation of CVE-2025-38075 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-64043, BELL-CVE-2025-38075, DEBIAN-CVE-2025-38075, GHSA-qr73-mcp4-c9g4, ROOT-OS-DEBIAN-11-CVE-2025-38075, ROOT-OS-DEBIAN-12-CVE-2025-38075 and 3 more.