CVE-2026-23216: Linux kernel · scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ba684191437380a07b27666eb4e72748be1ea201 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Total control over the software or total information disclosure
CISA SSVC assessment, 2026-06-10.
- Patch
- Available – fixed in ba684191437380a07b27666eb4e72748be1ea201, 275016a551ba1a068a3bd6171b18611726b67110, 9411a89e9e7135cc459178fa77a3f1d6191ae903 +4
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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Description
In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() In iscsit_dec_conn_usage_count(), the function calls complete() while holding the conn->conn_usage_lock. As soon as complete() is invoked, the waiter (such as iscsit_close_connection()) may wake up and proceed to free the iscsit_conn structure. If the waiter frees the memory before the current thread reaches spin_unlock_bh(), it results in a KASAN slab-use-after-free as the function attempts to release a lock within the already-freed connection structure. Fix this by releasing the spinlock before calling complete().
References
- git.kernel.org/stable/c/ba684191437380a07b27666eb4e72748be1ea201 (opens in a new tab)
- git.kernel.org/stable/c/8518f072fc92921418cd9ed4268dd4f3e9a8fd75 (opens in a new tab)
- git.kernel.org/stable/c/275016a551ba1a068a3bd6171b18611726b67110 (opens in a new tab)
- git.kernel.org/stable/c/73b487d44bf4f92942629d578381f89c326ff77f (opens in a new tab)
- git.kernel.org/stable/c/48fe983e92de2c59d143fe38362ad17ba23ec7f3 (opens in a new tab)
- git.kernel.org/stable/c/3835e49e146a4e6e7787b29465f1a23379b6ec44 (opens in a new tab)
- git.kernel.org/stable/c/9411a89e9e7135cc459178fa77a3f1d6191ae903 (opens in a new tab)