qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure adapter->dcb would get silently freed inside qlcnic_dcb_enable() in case qlcnic_dcb_attach() would return an error, which always happens under OOM conditions. This would lead to use-after-free because both of the existing callers invoke qlcnic_dcb_get_info() on the obtained pointer, which is potentially freed at that point. Propagate errors from qlcnic_dcb_enable(), and instead free the dcb pointer at callsite using qlcnic_dcb_free(). This also removes the now unused qlcnic_clear_dcb_ops() helper, which was a simple wrapper around kfree() also causing memory leaks for partially initialized dcb. Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 3.14 and later | 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.87, 6.0.19, 6.1.5, 6.2 | Patch available | CNA |
- Linux VendorLinux Affected 3.14 and later Fixed in 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.87, 6.0.19, 6.1.5, 6.2 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 3.14 to before 4.14.303; 4.15 to before 4.19.270; 4.20 to before 5.4.229; 5.5 to before 5.10.163; 5.11 to before 5.15.87; 5.16 to before 6.0.19; 6.1 to before 6.1.5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:* | 6.2 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:* | 6.2 rc2 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.14 to before 4.14.303; 4.15 to before 4.19.270; 4.20 to before 5.4.229; 5.5 to before 5.10.163; 5.11 to before 5.15.87; 5.16 to before 6.0.19; 6.1 to before 6.1.5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:* Versions 6.2 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:* Versions 6.2 rc2 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.87, 6.0.19, 6.1.5, 6.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
Not affected: 4 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2022-50288
- 2026-10-03 Alias added: GHSA-rqx9-pg4r-6qm3
References
Patch 8
- https://git.kernel.org/stable/c/36999236f0b12d5de21a6f40e93b570727b9ceb2
- https://git.kernel.org/stable/c/d12a7510293d3370b234b0b7c5eda33e58786768
- https://git.kernel.org/stable/c/8f97eeb02a553cdc78c83a0596448a370e1518c4
- https://git.kernel.org/stable/c/513787ff9a331b461115e8a145a983d650a84fcb
- https://git.kernel.org/stable/c/95df720e64a6409d8152827a776c43f615e3321a
- https://git.kernel.org/stable/c/8df1dc04ce0e4c03b51a756749c250a9cb17d707
- https://git.kernel.org/stable/c/a2a694e6edbdb3efb34e1613a31fdcf6cf444a55
- https://git.kernel.org/stable/c/13a7c8964afcd8ca43c0b6001ebb0127baa95362
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Sources
- CVE-2022-50288 · CVE Program
- CVE-2022-50288 · NVD
- FIRST EPSS
- GHSA-rqx9-pg4r-6qm3 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-50288 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences