CVE-2025-21788 (GCVE-0-2025-21788)
Vulnerability from cvelistv5
Published
2025-02-27 02:18
Modified
2025-05-04 07:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases If the XDP program doesn't result in XDP_PASS then we leak the memory allocated by am65_cpsw_build_skb(). It is pointless to allocate SKB memory before running the XDP program as we would be wasting CPU cycles for cases other than XDP_PASS. Move the SKB allocation after evaluating the XDP program result. This fixes the memleak. A performance boost is seen for XDP_DROP test. XDP_DROP test: Before: 460256 rx/s 0 err/s After: 784130 rx/s 0 err/s
References
Impacted products
Vendor Product Version
Linux Linux Version: 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6
Version: 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6
Version: 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6
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          "programFiles": [
            "drivers/net/ethernet/ti/am65-cpsw-nuss.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases\n\nIf the XDP program doesn\u0027t result in XDP_PASS then we leak the\nmemory allocated by am65_cpsw_build_skb().\n\nIt is pointless to allocate SKB memory before running the XDP\nprogram as we would be wasting CPU cycles for cases other than XDP_PASS.\nMove the SKB allocation after evaluating the XDP program result.\n\nThis fixes the memleak. A performance boost is seen for XDP_DROP test.\n\nXDP_DROP test:\nBefore: 460256 rx/s                  0 err/s\nAfter:  784130 rx/s                  0 err/s"
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    "dateReserved": "2024-12-29T08:45:45.766Z",
    "dateUpdated": "2025-05-04T07:21:15.604Z",
    "state": "PUBLISHED"
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}


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