{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-50476", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-04T15:13:33.467Z", "datePublished": "2025-10-04T15:16:36.895Z", "dateUpdated": "2025-10-04T15:16:36.895Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-10-04T15:16:36.895Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ntb_netdev.c"], "versions": [{"version": "548c237c0a9972df5d1afaca38aa733ee577128d", "lessThan": "d4460c82177899751975180c268f352893302221", "status": "affected", "versionType": "git"}, {"version": "548c237c0a9972df5d1afaca38aa733ee577128d", "lessThan": "dd860b39aa7c7b82e6c99b6fdb99d4610ce49d67", "status": "affected", "versionType": "git"}, {"version": "548c237c0a9972df5d1afaca38aa733ee577128d", "lessThan": "8b78493968ed3cef0326183ed059c55e42f24d5b", "status": "affected", "versionType": "git"}, {"version": "548c237c0a9972df5d1afaca38aa733ee577128d", "lessThan": "a6b9e09403102bdf8402dae734800e4916c7ea58", "status": "affected", "versionType": "git"}, {"version": "548c237c0a9972df5d1afaca38aa733ee577128d", "lessThan": "13286ad1c7c49c606fdcba4cf66f953a1a16c1ca", "status": "affected", "versionType": "git"}, {"version": "548c237c0a9972df5d1afaca38aa733ee577128d", "lessThan": "21296a52caa6a6bad6debdfe40ad81d4f1a27e69", "status": "affected", "versionType": "git"}, {"version": "548c237c0a9972df5d1afaca38aa733ee577128d", "lessThan": "14d245da57a11e80277ab455aa9b6dcc5ed38a19", "status": "affected", "versionType": "git"}, {"version": "548c237c0a9972df5d1afaca38aa733ee577128d", "lessThan": "07e28a8f450217db679802ebd4de0915556ce846", "status": "affected", "versionType": "git"}, {"version": "548c237c0a9972df5d1afaca38aa733ee577128d", "lessThan": "5f7d78b2b12a9d561f48fa00bab29b40f4616dad", "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/ntb_netdev.c"], "versions": [{"version": "3.9", "status": "affected"}, {"version": "0", "lessThan": "3.9", "status": "unaffected", "versionType": "semver"}, {"version": "4.9.337", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.303", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.270", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.229", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.163", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.86", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": 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"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"}]}]}], "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"}], "title": "ntb_netdev: Use dev_kfree_skb_any() in interrupt context", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"cveTags": [], "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."}], "id": "CVE-2022-50476", "lastModified": "2025-10-06T14:56:47.823", "metrics": {}, "published": "2025-10-04T16:15:44.177", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/07e28a8f450217db679802ebd4de0915556ce846"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/13286ad1c7c49c606fdcba4cf66f953a1a16c1ca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/14d245da57a11e80277ab455aa9b6dcc5ed38a19"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/21296a52caa6a6bad6debdfe40ad81d4f1a27e69"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5f7d78b2b12a9d561f48fa00bab29b40f4616dad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b78493968ed3cef0326183ed059c55e42f24d5b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a6b9e09403102bdf8402dae734800e4916c7ea58"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d4460c82177899751975180c268f352893302221"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dd860b39aa7c7b82e6c99b6fdb99d4610ce49d67"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: ntb_netdev: Use dev_kfree_skb_any() in interrupt context", "id": "2401527", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2401527"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nntb_netdev: Use dev_kfree_skb_any() in interrupt context\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.\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.\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."], "name": "CVE-2022-50476", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50476\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50476\nhttps://lore.kernel.org/linux-cve-announce/2025100438-CVE-2022-50476-f1b3@gregkh/T"], "threat_severity": "Moderate"}