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scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() In iscsit_dec_session_usage_count(), the function calls complete() while holding the sess->session_usage_lock. Similar to the connection usage count logic, the waiter signaled by complete() (e.g., in the session release path) may wake up and free the iscsit_session structure immediately. This creates a race condition where the current thread may attempt to execute spin_unlock_bh() on a session structure that has already been deallocated, resulting in a KASAN slab-use-after-free. To resolve this, release the session_usage_lock before calling complete() to ensure all dereferences of the sess pointer are finished before the waiter is allowed to proceed with deallocation.

Announced Source revision 1
Original source ↗

CVE-2026-23193

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-23193

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "2b64015550a13bcc72910be0565548d9a754d46d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "fd8b0900173307039d3a84644c2fee041a7ed4fb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "d8dbdc146e9e9a976931b78715be2e91299049f9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "11ebafffce31efc6abeb28c509017976fc49f1ca",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "41b86a9ec037bd3435d68dd3692f0891a207e7e7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "4530f4e4d0e6a207110b0ffed0c911bca43531a4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "84dc6037390b8607c5551047d3970336cb51ba9a",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/target/iscsi/iscsi_target_util.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.1"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.1",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.250",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.200",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.163",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.124",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.70",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.10",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/target/iscsi/iscsi_target_util.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23193

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#39778 · Revision 1
Added to Heist Feed
Publisher date
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