scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() When parsing the txq list in lpfc_drain_txq(), the driver attempts to pass the requests to the adapter. If such an attempt fails, a local "fail_msg" string is set and a log message output. The job is then added to a completions list for cancellation. Processing of any further jobs from the txq list continues, but since "fail_msg" remains set, jobs are added to the completions list regardless of whether a wqe was passed to the adapter. If successfully added to txcmplq, jobs are added to both lists resulting in list corruption. Fix by clearing the fail_msg string after adding a job to the completions list. This stops the subsequent jobs from being added to the completions list unless they had an appropriate failure.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.36 and later | 4.4.293, 4.9.291, 4.14.256, 4.19.218, 5.4.162, 5.10.82, 5.15.5, 5.16 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.36 and later Fixed in 4.4.293, 4.9.291, 4.14.256, 4.19.218, 5.4.162, 5.10.82, 5.15.5, 5.16 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 4.4.293; 4.5 to before 4.9.291; 4.10 to before 4.14.256; 4.15 to before 4.19.218; 4.20 to before 5.4.162; 5.5 to before 5.10.82; 5.11 to before 5.15.5 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.4.293; 4.5 to before 4.9.291; 4.10 to before 4.14.256; 4.15 to before 4.19.218; 4.20 to before 5.4.162; 5.5 to before 5.10.82; 5.11 to before 5.15.5 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.4.293, 4.9.291, 4.14.256, 4.19.218, 5.4.162, 5.10.82, 5.15.5, 5.16
Red Hat 1 advisory
- RHSA-2022:1988 Released 2022-05-10 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-372.9.1.el8, kernel-4.18.0-372.9.1.el8, kernel-abi-stablelists-4.18.0-372.9.1.el8 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-372.9.1.el8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2022:1988 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2022:1988 |
Not affected: 1 product
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-47203
- 2026-10-03 Alias added: GHSA-84g6-j698-p58m
References
Patch 8
- https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674dd
- https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f
- https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305
- https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b
- https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f
- https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca
- https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5
- https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d
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- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2021-47203 · CVE Program
- CVE-2021-47203 · NVD
- FIRST EPSS
- GHSA-84g6-j698-p58m · GitHub Advisory Database · CC BY 4.0
- CVE-2021-47203 · Red Hat security data · CC BY 4.0
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