{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47013","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-27T18:42:55.953Z","datePublished":"2024-02-28T08:13:30.905Z","dateUpdated":"2025-05-04T07:02:18.890Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:02:18.890Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send\n\nIn emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..).\nIf some error happens in emac_tx_fill_tpd(), the skb will be freed via\ndev_kfree_skb(skb) in error branch of emac_tx_fill_tpd().\nBut the freed skb is still used via skb->len by netdev_sent_queue(,skb->len).\n\nAs i observed that emac_tx_fill_tpd() haven't modified the value of skb->len,\nthus my patch assigns skb->len to 'len' before the possible free and\nuse 'len' instead of skb->len later."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/qualcomm/emac/emac-mac.c"],"versions":[{"version":"b9b17debc69d27cd55e21ee51a5ba7fc50a426cf","lessThan":"c7f75d11fe72913d2619f97b2334b083cd7bb955","status":"affected","versionType":"git"},{"version":"b9b17debc69d27cd55e21ee51a5ba7fc50a426cf","lessThan":"dc1b438a35773d030be0ee80d9c635c3e558a322","status":"affected","versionType":"git"},{"version":"b9b17debc69d27cd55e21ee51a5ba7fc50a426cf","lessThan":"16d8c44be52e3650917736d45f5904384a9da834","status":"affected","versionType":"git"},{"version":"b9b17debc69d27cd55e21ee51a5ba7fc50a426cf","lessThan":"55fcdd1258faaecca74b91b88cc0921f9edd775d","status":"affected","versionType":"git"},{"version":"b9b17debc69d27cd55e21ee51a5ba7fc50a426cf","lessThan":"9dc373f74097edd0e35f3393d6248eda8d1ba99d","status":"affected","versionType":"git"},{"version":"b9b17debc69d27cd55e21ee51a5ba7fc50a426cf","lessThan":"8c06f34785068b87e2b560534c77c163d6c6dca7","status":"affected","versionType":"git"},{"version":"b9b17debc69d27cd55e21ee51a5ba7fc50a426cf","lessThan":"e407495ba6788a67d1bd41714158c079e340879b","status":"affected","versionType":"git"},{"version":"b9b17debc69d27cd55e21ee51a5ba7fc50a426cf","lessThan":"6d72e7c767acbbdd44ebc7d89c6690b405b32b57","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/qualcomm/emac/emac-mac.c"],"versions":[{"version":"4.9","status":"affected"},{"version":"0","lessThan":"4.9","status":"unaffected","versionType":"semver"},{"version":"4.9.269","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.233","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.191","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.119","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.37","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.11.21","lessThanOrEqual":"5.11.*","status":"unaffected","versionType":"semver"},{"version":"5.12.4","lessThanOrEqual":"5.12.*","status":"unaffected","versionType":"semver"},{"version":"5.13","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":"4.9","versionEndExcluding":"4.9.269"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"4.14.233"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"4.19.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.4.119"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.10.37"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.11.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.12.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955"},{"url":"https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322"},{"url":"https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834"},{"url":"https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d"},{"url":"https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d"},{"url":"https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7"},{"url":"https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b"},{"url":"https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57"}],"title":"net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47013","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-02-28T19:56:27.719807Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:13:43.156Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:24:39.713Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57","tags":["x_transferred"]}]}]}}