{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23206","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:45.986Z","datePublished":"2026-02-14T16:27:29.095Z","dateUpdated":"2026-05-11T22:02:22.500Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:02:22.500Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero\n\nThe driver allocates arrays for ports, FDBs, and filter blocks using\nkcalloc() with ethsw->sw_attr.num_ifs as the element count. When the\ndevice reports zero interfaces (either due to hardware configuration\nor firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10)\ninstead of NULL.\n\nLater in dpaa2_switch_probe(), the NAPI initialization unconditionally\naccesses ethsw->ports[0]->netdev, which attempts to dereference\nZERO_SIZE_PTR (address 0x10), resulting in a kernel panic.\n\nAdd a check to ensure num_ifs is greater than zero after retrieving\ndevice attributes. This prevents the zero-sized allocations and\nsubsequent invalid pointer dereference."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c"],"versions":[{"version":"0b1b71370458860579831e77485883fcf2e8fbbe","lessThan":"2fcccca88456b592bd668db13aa1d29ed257ca2b","status":"affected","versionType":"git"},{"version":"0b1b71370458860579831e77485883fcf2e8fbbe","lessThan":"80165ff16051448d6f840585ebe13f2400415df3","status":"affected","versionType":"git"},{"version":"0b1b71370458860579831e77485883fcf2e8fbbe","lessThan":"b97415c4362f739e25ec6f71012277086fabdf6f","status":"affected","versionType":"git"},{"version":"0b1b71370458860579831e77485883fcf2e8fbbe","lessThan":"4acc40db06ffd0fd92683505342b00c8a7394c60","status":"affected","versionType":"git"},{"version":"0b1b71370458860579831e77485883fcf2e8fbbe","lessThan":"155eb99aff2920153bf21217ae29565fff81e6af","status":"affected","versionType":"git"},{"version":"0b1b71370458860579831e77485883fcf2e8fbbe","lessThan":"ed48a84a72fefb20a82dd90a7caa7807e90c6f66","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c"],"versions":[{"version":"5.13","status":"affected"},{"version":"0","lessThan":"5.13","status":"unaffected","versionType":"semver"},{"version":"5.15.200","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.163","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.124","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.70","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.10","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.200"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.163"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.124"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.70"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/2fcccca88456b592bd668db13aa1d29ed257ca2b"},{"url":"https://git.kernel.org/stable/c/80165ff16051448d6f840585ebe13f2400415df3"},{"url":"https://git.kernel.org/stable/c/b97415c4362f739e25ec6f71012277086fabdf6f"},{"url":"https://git.kernel.org/stable/c/4acc40db06ffd0fd92683505342b00c8a7394c60"},{"url":"https://git.kernel.org/stable/c/155eb99aff2920153bf21217ae29565fff81e6af"},{"url":"https://git.kernel.org/stable/c/ed48a84a72fefb20a82dd90a7caa7807e90c6f66"}],"title":"dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero","x_generator":{"engine":"bippy-1.2.0"}}}}