{"id":"CVE-2022-50476","state":"PUBLISHED","title":"ntb_netdev: Use dev_kfree_skb_any() in interrupt context","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nntb_netdev: Use dev_kfree_skb_any() in interrupt context\n\nTX/RX callback handlers (ntb_netdev_tx_handler(),\nntb_netdev_rx_handler()) can be called in interrupt\ncontext via the DMA framework when the respective\nDMA operations have completed. As such, any calls\nby these routines to free skb's, should use the\ninterrupt context safe dev_kfree_skb_any() function.\n\nPreviously, these callback handlers would call the\ninterrupt unsafe version of dev_kfree_skb(). This has\nnot presented an issue on Intel IOAT DMA engines as\nthat driver utilizes tasklets rather than a hard\ninterrupt handler, like the AMD PTDMA DMA driver.\nOn AMD systems, a kernel WARNING message is\nencountered, which is being issued from\nskb_release_head_state() due to in_hardirq()\nbeing true.\n\nBesides the user visible WARNING from the kernel,\nthe other symptom of this bug was that TCP/IP performance\nacross the ntb_netdev interface was very poor, i.e.\napproximately an order of magnitude below what was\nexpected. With the repair to use dev_kfree_skb_any(),\nkernel WARNINGs from skb_release_head_state() ceased\nand TCP/IP performance, as measured by iperf, was on\npar with expected results, approximately 20 Gb/s on\nAMD Milan based server. Note that this performance\nis comparable with Intel based servers.","publishedAt":"2025-10-04T15:16:36.895Z","updatedAt":"2026-05-11T19:20:13.817Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"d4460c82177899751975180c268f352893302221","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"dd860b39aa7c7b82e6c99b6fdb99d4610ce49d67","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"8b78493968ed3cef0326183ed059c55e42f24d5b","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"a6b9e09403102bdf8402dae734800e4916c7ea58","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"13286ad1c7c49c606fdcba4cf66f953a1a16c1ca","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"21296a52caa6a6bad6debdfe40ad81d4f1a27e69","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"14d245da57a11e80277ab455aa9b6dcc5ed38a19","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"07e28a8f450217db679802ebd4de0915556ce846","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"5f7d78b2b12a9d561f48fa00bab29b40f4616dad","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ntb_netdev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"4.9.337","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.86","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ntb_netdev.c"]}],"references":["https://git.kernel.org/stable/c/d4460c82177899751975180c268f352893302221","https://git.kernel.org/stable/c/dd860b39aa7c7b82e6c99b6fdb99d4610ce49d67","https://git.kernel.org/stable/c/8b78493968ed3cef0326183ed059c55e42f24d5b","https://git.kernel.org/stable/c/a6b9e09403102bdf8402dae734800e4916c7ea58","https://git.kernel.org/stable/c/13286ad1c7c49c606fdcba4cf66f953a1a16c1ca","https://git.kernel.org/stable/c/21296a52caa6a6bad6debdfe40ad81d4f1a27e69","https://git.kernel.org/stable/c/14d245da57a11e80277ab455aa9b6dcc5ed38a19","https://git.kernel.org/stable/c/07e28a8f450217db679802ebd4de0915556ce846","https://git.kernel.org/stable/c/5f7d78b2b12a9d561f48fa00bab29b40f4616dad"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50476.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50476","state":"PUBLISHED","datePublished":"2025-10-04T15:16:36.895Z","dateUpdated":"2026-05-11T19:20:13.817Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-10-04T15:13:33.467Z"},"containers":{"cna":{"title":"ntb_netdev: Use dev_kfree_skb_any() in interrupt context","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nntb_netdev: Use dev_kfree_skb_any() in interrupt context\n\nTX/RX callback handlers (ntb_netdev_tx_handler(),\nntb_netdev_rx_handler()) can be called in interrupt\ncontext via the DMA framework when the respective\nDMA operations have completed. As such, any calls\nby these routines to free skb's, should use the\ninterrupt context safe dev_kfree_skb_any() function.\n\nPreviously, these callback handlers would call the\ninterrupt unsafe version of dev_kfree_skb(). This has\nnot presented an issue on Intel IOAT DMA engines as\nthat driver utilizes tasklets rather than a hard\ninterrupt handler, like the AMD PTDMA DMA driver.\nOn AMD systems, a kernel WARNING message is\nencountered, which is being issued from\nskb_release_head_state() due to in_hardirq()\nbeing true.\n\nBesides the user visible WARNING from the kernel,\nthe other symptom of this bug was that TCP/IP performance\nacross the ntb_netdev interface was very poor, i.e.\napproximately an order of magnitude below what was\nexpected. With the repair to use dev_kfree_skb_any(),\nkernel WARNINGs from skb_release_head_state() ceased\nand TCP/IP performance, as measured by iperf, was on\npar with expected results, approximately 20 Gb/s on\nAMD Milan based server. Note that this performance\nis comparable with Intel based servers."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"d4460c82177899751975180c268f352893302221","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"dd860b39aa7c7b82e6c99b6fdb99d4610ce49d67","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"8b78493968ed3cef0326183ed059c55e42f24d5b","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"a6b9e09403102bdf8402dae734800e4916c7ea58","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"13286ad1c7c49c606fdcba4cf66f953a1a16c1ca","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"21296a52caa6a6bad6debdfe40ad81d4f1a27e69","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"14d245da57a11e80277ab455aa9b6dcc5ed38a19","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"07e28a8f450217db679802ebd4de0915556ce846","versionType":"git"},{"version":"548c237c0a9972df5d1afaca38aa733ee577128d","status":"affected","lessThan":"5f7d78b2b12a9d561f48fa00bab29b40f4616dad","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ntb_netdev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"4.9.337","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.86","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ntb_netdev.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d4460c82177899751975180c268f352893302221"},{"url":"https://git.kernel.org/stable/c/dd860b39aa7c7b82e6c99b6fdb99d4610ce49d67"},{"url":"https://git.kernel.org/stable/c/8b78493968ed3cef0326183ed059c55e42f24d5b"},{"url":"https://git.kernel.org/stable/c/a6b9e09403102bdf8402dae734800e4916c7ea58"},{"url":"https://git.kernel.org/stable/c/13286ad1c7c49c606fdcba4cf66f953a1a16c1ca"},{"url":"https://git.kernel.org/stable/c/21296a52caa6a6bad6debdfe40ad81d4f1a27e69"},{"url":"https://git.kernel.org/stable/c/14d245da57a11e80277ab455aa9b6dcc5ed38a19"},{"url":"https://git.kernel.org/stable/c/07e28a8f450217db679802ebd4de0915556ce846"},{"url":"https://git.kernel.org/stable/c/5f7d78b2b12a9d561f48fa00bab29b40f4616dad"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:20:13.817Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"4.9.337"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"4.14.303"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"4.19.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.4.229"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.10.163"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.15.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.0.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.1.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}