net: marvell: prestera: fix NULL dereference on devlink_alloc() failure
Priority LOW 24CWE-476Published · Updated
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
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.
Summary
In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix NULL dereference on devlink_alloc() failure devlink_alloc() may return NULL on allocation failure, but prestera_devlink_alloc() unconditionally calls devlink_priv() on the returned pointer. This leads to a NULL pointer dereference if devlink allocation fails. Add a check for a NULL devlink pointer and return NULL early to avoid the crash.
Why it matters now
EPSS 0.00137 3rd percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.15.198, 6.1.161, 6.6.121 +3
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 | 5.10 and later | 5.15.198, 6.1.161, 6.6.121, 6.12.66, 6.18.6, 6.19 | Patch available | CNA |
- Linux VendorLinux Affected 5.10 and later Fixed in 5.15.198, 6.1.161, 6.6.121, 6.12.66, 6.18.6, 6.19 Patch available CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.10.1 to before 5.15.198; 5.16 to before 6.1.161; 6.2 to before 6.6.121; 6.7 to before 6.12.66; 6.13 to before 6.18.6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.10:-:*:*:*:*:*:* | 5.10 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:* | 6.19 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:* | 6.19 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:* | 6.19 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:* | 6.19 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:* | 6.19 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:* | 6.19 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:* | 6.19 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:* | 6.19 rc8 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.10.1 to before 5.15.198; 5.16 to before 6.1.161; 6.2 to before 6.6.121; 6.7 to before 6.12.66; 6.13 to before 6.18.6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.10:-:*:*:*:*:*:* Versions 5.10 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:* Versions 6.19 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:* Versions 6.19 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:* Versions 6.19 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:* Versions 6.19 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:* Versions 6.19 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:* Versions 6.19 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:* Versions 6.19 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:* Versions 6.19 rc8 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.198, 6.1.161, 6.6.121, 6.12.66, 6.18.6, 6.19
Vendor assessments
Red Hat
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-23019
- 2026-10-03 Alias added: GHSA-xw9f-vg47-m9mf
References
Patch 6
- https://git.kernel.org/stable/c/8a4333b2818f0d853b43e139936c20659366e4a0
- https://git.kernel.org/stable/c/325aea74be7e192b5c947c782da23b0d19a5fda2
- https://git.kernel.org/stable/c/94e070cd50790317fba7787ae6006934b7edcb6f
- https://git.kernel.org/stable/c/3950054c9512add0cc79ab7e72b6d2f9f675e25b
- https://git.kernel.org/stable/c/326a4b7e61d01db3507f71c8bb5e85362f607064
- https://git.kernel.org/stable/c/a428e0da1248c353557970848994f35fd3f005e2
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- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2026-23019 · CVE Program
- CVE-2026-23019 · NVD
- FIRST EPSS
- GHSA-xw9f-vg47-m9mf · GitHub Advisory Database · CC BY 4.0
- CVE-2026-23019 · Red Hat security data · CC BY 4.0
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