CVE-2021-47328scsi: iscsi: Fix conn use after free during resets
- 9.8CriticalCVSS base score
- 0.77%Exploitation in 30 daysEPSS · top 44% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: Fix conn use after free during resets If we haven't done a unbind target call we can race where iscsi_conn_teardown wakes up the EH thread and then frees the conn while those threads are still accessing the conn ehwait. We can only do one TMF per session so this just moves the TMF fields from the conn to the session. We can then rely on the iscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session call to remove the target and it's devices, and know after that point there is no device or scsi-ml callout trying to access the session.
Timeline
ID reserved
By Linux
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.77% · top 44% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 660d0831d1494a6837b2f810d08b5be092c1f31d – < bf20d85a88384574fabb3d53ad62a8af57e7ab11
- affected 660d0831d1494a6837b2f810d08b5be092c1f31d – < d04958a348e560938410e04a12fb99da9c7e6a00
- affected 660d0831d1494a6837b2f810d08b5be092c1f31d – < 89812e7957ab0746eab66ed6fc49d52bb4dca250
- affected 660d0831d1494a6837b2f810d08b5be092c1f31d – < f0a031f7c55ffd944fead1ddaf2aa94df9a158c1
- affected 660d0831d1494a6837b2f810d08b5be092c1f31d – < fa9542b35ceb4202e8f8d65f440529a63524dca9
- affected 660d0831d1494a6837b2f810d08b5be092c1f31d – < ec29d0ac29be366450a7faffbcf8cba3a6a3b506
- affected 861a9633c22ee8b484e1b4054995f7e1b94a3834
- affected 0adcec66bce9b7e84847da09ae3f8bc36e753312
- affected 20b38ab5b687df3dbb873cfb0efa946a021f890a
- affected 71b6a23ea944c6a30958bd15a69211e1fd521e1e
- affected 3.2.72 – < 3.3
- affected 3.4.111 – < 3.5
- affected 3.18.22 – < 3.19
- affected 4.1.7 – < 4.2
- affected 4.2
- unaffected < 4.2
- unaffected 4.19.198 – ≤ 4.19.*
- unaffected 5.4.134 – ≤ 5.4.*
- unaffected 5.10.52 – ≤ 5.10.*
- unaffected 5.12.19 – ≤ 5.12.*
- unaffected 5.13.4 – ≤ 5.13.*
- unaffected 5.14 – ≤ *
References
References6
- https://git.kernel.org/stable/c/bf20d85a88384574fabb3d53ad62a8af57e7ab11 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/d04958a348e560938410e04a12fb99da9c7e6a00 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/89812e7957ab0746eab66ed6fc49d52bb4dca250 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/f0a031f7c55ffd944fead1ddaf2aa94df9a158c1 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/fa9542b35ceb4202e8f8d65f440529a63524dca9 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/ec29d0ac29be366450a7faffbcf8cba3a6a3b506 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-34333 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-47328)Record last updated .