CVE-2026-23206None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero The driver allocates arrays for ports, FDBs, and filter blocks using kcalloc() with ethsw->sw_attr…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero
The driver allocates arrays for ports, FDBs, and filter blocks using kcalloc() with ethsw->sw_attr.num_ifs as the element count. When the device reports zero interfaces (either due to hardware configuration or firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10) instead of NULL.
Later in dpaa2_switch_probe(), the NAPI initialization unconditionally accesses ethsw->ports[0]->netdev, which attempts to dereference ZERO_SIZE_PTR (address 0x10), resulting in a kernel panic.
Add a check to ensure num_ifs is greater than zero after retrieving device attributes. This prevents the zero-sized allocations and subsequent invalid pointer dereference.
Linux >= 0b1b71370458860579831e77485883fcf2e8fbbe < 2fcccca88456b592bd668db13aa1d29ed257ca2bLinux >= 0b1b71370458860579831e77485883fcf2e8fbbe < 80165ff16051448d6f840585ebe13f2400415df3Linux >= 0b1b71370458860579831e77485883fcf2e8fbbe < b97415c4362f739e25ec6f71012277086fabdf6fLinux >= 0b1b71370458860579831e77485883fcf2e8fbbe < 4acc40db06ffd0fd92683505342b00c8a7394c60Linux >= 0b1b71370458860579831e77485883fcf2e8fbbe < 155eb99aff2920153bf21217ae29565fff81e6afLinux >= 0b1b71370458860579831e77485883fcf2e8fbbe < ed48a84a72fefb20a82dd90a7caa7807e90c6f66Linux 5.13Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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