7.8

CVE-2026-23216: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()

Modified
AliasesUBUNTU-CVE-2026-23216DEBIAN-CVE-2026-23216
Published 18-02-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-23216 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.14%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 42 · Related 22
DLA-4498-1DLA-4499-1DSA-6141-1DSA-6163-1LSN-0122-1MGASA-2026-0097

Timeline

  1. 18-02-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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().

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.12% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-185.195 | < 6.8.0-117.117
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1111.118 | < 6.8.0-1055.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e48354ce078c079996f89d715dfa44814b4eba01, < ba684191437380a07b27666eb4e72748be1ea201 | ≥ e48354ce078c079996f89d715dfa44814b4eba01, < 8518f072fc92921418cd9ed4268dd4f3e9a8fd75 | ≥ e48354ce078c079996f89d715dfa44814b4eba01, < 275016a551ba1a068a3bd6171b18611726b67110 | ≥ e48354ce078c079996f89d715dfa44814b4eba01, < 73b487d44bf4f92942629d578381f89c326ff77f | ≥ e48354ce078c079996f89d715dfa44814b4eba01, < 48fe983e92de2c59d143fe38362ad17ba23ec7f3 | ≥ e48354ce078c079996f89d715dfa44814b4eba01, < 3835e49e146a4e6e7787b29465f1a23379b6ec44 | ≥ e48354ce078c079996f89d715dfa44814b4eba01, < 9411a89e9e7135cc459178fa77a3f1d6191ae903 | 3.1
  • linux_kernel≥ 3.1, < 5.10.250 | ≥ 5.11, < 5.15.200 | ≥ 5.16, < 6.1.163 | ≥ 6.2, < 6.6.124 | ≥ 6.7, < 6.12.70 | ≥ 6.13, < 6.18.10 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5 | 6.19:rc6
Debian1 product
  • linux< 6.1.164-1 | < 6.12.73-1 | < 6.18.10-1

3 vendors · 160 products

References

27 links
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