{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64424", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.787Z", "datePublished": "2026-07-25T08:51:02.276Z", "dateUpdated": "2026-07-25T08:51:02.276Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:51:02.276Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetpoll: fix a use-after-free on shutdown path\n\nThere is a use-after-free error on netpoll, which is clearly detected by\nKASAN.\n\n BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x3b/0x80\n Read of size 1 at addr ... by task kworker/9:1\n Workqueue: events queue_process\n Call Trace:\n skb_dequeue+0x1e/0xb0\n queue_process+0x2c/0x600\n process_scheduled_works+0x4b6/0x850\n worker_thread+0x414/0x5a0\n Allocated by task 242:\n __netpoll_setup+0x201/0x4a0\n netpoll_setup+0x249/0x550\n enabled_store+0x32f/0x380\n Freed by task 0:\n kfree+0x1b7/0x540\n rcu_core+0x3f8/0x7a0\n\nThe problem happens when there is a pending TX worker running in\nparallel with the cleanup path.\n\nThis is what happens on netpoll shutdown path:\n\n1) __netpoll_cleanup() is called\n2) set dev->npinfo to NULL\n3) call_rcu() with rcu_cleanup_netpoll_info()\n 3.1) rcu_cleanup_netpoll_info() tries to cancel all workers with\n cancel_delayed_work(), but doesn't wait for the worker to finish\n4) and kfree(npinfo);\n\nBecause 3.1) doesn't really cancel the work, as the comment says \"we\ncan't call cancel_delayed_work_sync here, as we are in softirq\", the TX\nworker can run after 4).\n\nTl;DR: queue_process() is not an RCU reader, it reaches npinfo through\nthe work item via container_of().\n\nUse disable_delayed_work_sync() to ensure the worker is completely\nstopped and prevent any future re-arming attempts. Once npinfo is set\nto NULL, senders will bail out and not queue new work. The disable flag\nensures any in-flight re-arming attempts also fail silently.\n\nIn the future, we can do the cleanup inline here without needing the\nnpinfo->rcu rcu_head, but that is net-next material."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/netpoll.c"], "versions": [{"version": "38e6bc185d9544dfad1774b3f8902a0b061aea25", "lessThan": "95ecc5b58042f6b6743b589e6588f1cd7ba336aa", "status": "affected", "versionType": "git"}, {"version": "38e6bc185d9544dfad1774b3f8902a0b061aea25", "lessThan": "a33f37f8d079da7236ed7b7e2aed2a34ab81e7cf", "status": "affected", "versionType": "git"}, {"version": "38e6bc185d9544dfad1774b3f8902a0b061aea25", "lessThan": "5ed09a108d93a3b002cc79823d9455b50c4a8be7", "status": "affected", "versionType": "git"}, {"version": "38e6bc185d9544dfad1774b3f8902a0b061aea25", "lessThan": "45f1458a85017a023f138b22ac5c76abd477db42", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/netpoll.c"], "versions": [{"version": "3.6", "status": "affected"}, {"version": "0", "lessThan": "3.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc2", "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": "3.6", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "7.2-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/95ecc5b58042f6b6743b589e6588f1cd7ba336aa"}, {"url": "https://git.kernel.org/stable/c/a33f37f8d079da7236ed7b7e2aed2a34ab81e7cf"}, {"url": "https://git.kernel.org/stable/c/5ed09a108d93a3b002cc79823d9455b50c4a8be7"}, {"url": "https://git.kernel.org/stable/c/45f1458a85017a023f138b22ac5c76abd477db42"}], "title": "netpoll: fix a use-after-free on shutdown path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/core/netpoll.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "95ecc5b58042f6b6743b589e6588f1cd7ba336aa", "status": "affected", "version": "38e6bc185d9544dfad1774b3f8902a0b061aea25", "versionType": "git"}, {"lessThan": "a33f37f8d079da7236ed7b7e2aed2a34ab81e7cf", "status": "affected", "version": "38e6bc185d9544dfad1774b3f8902a0b061aea25", "versionType": "git"}, {"lessThan": "5ed09a108d93a3b002cc79823d9455b50c4a8be7", "status": "affected", "version": "38e6bc185d9544dfad1774b3f8902a0b061aea25", "versionType": "git"}, {"lessThan": "45f1458a85017a023f138b22ac5c76abd477db42", "status": "affected", "version": "38e6bc185d9544dfad1774b3f8902a0b061aea25", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/core/netpoll.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.6"}, {"lessThan": "3.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.96", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.39", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetpoll: fix a use-after-free on shutdown path\n\nThere is a use-after-free error on netpoll, which is clearly detected by\nKASAN.\n\n BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x3b/0x80\n Read of size 1 at addr ... by task kworker/9:1\n Workqueue: events queue_process\n Call Trace:\n skb_dequeue+0x1e/0xb0\n queue_process+0x2c/0x600\n process_scheduled_works+0x4b6/0x850\n worker_thread+0x414/0x5a0\n Allocated by task 242:\n __netpoll_setup+0x201/0x4a0\n netpoll_setup+0x249/0x550\n enabled_store+0x32f/0x380\n Freed by task 0:\n kfree+0x1b7/0x540\n rcu_core+0x3f8/0x7a0\n\nThe problem happens when there is a pending TX worker running in\nparallel with the cleanup path.\n\nThis is what happens on netpoll shutdown path:\n\n1) __netpoll_cleanup() is called\n2) set dev->npinfo to NULL\n3) call_rcu() with rcu_cleanup_netpoll_info()\n 3.1) rcu_cleanup_netpoll_info() tries to cancel all workers with\n cancel_delayed_work(), but doesn't wait for the worker to finish\n4) and kfree(npinfo);\n\nBecause 3.1) doesn't really cancel the work, as the comment says \"we\ncan't call cancel_delayed_work_sync here, as we are in softirq\", the TX\nworker can run after 4).\n\nTl;DR: queue_process() is not an RCU reader, it reaches npinfo through\nthe work item via container_of().\n\nUse disable_delayed_work_sync() to ensure the worker is completely\nstopped and prevent any future re-arming attempts. Once npinfo is set\nto NULL, senders will bail out and not queue new work. The disable flag\nensures any in-flight re-arming attempts also fail silently.\n\nIn the future, we can do the cleanup inline here without needing the\nnpinfo->rcu rcu_head, but that is net-next material."}], "id": "CVE-2026-64424", "lastModified": "2026-08-11T15:01:50.637", "metrics": {}, "published": "2026-07-25T10:17:26.483", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/45f1458a85017a023f138b22ac5c76abd477db42"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5ed09a108d93a3b002cc79823d9455b50c4a8be7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/95ecc5b58042f6b6743b589e6588f1cd7ba336aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a33f37f8d079da7236ed7b7e2aed2a34ab81e7cf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: netpoll: fix a use-after-free on shutdown path", "id": "2507260", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507260"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's netpoll module. During the system shutdown process, a race condition can occur where a network transmission worker attempts to access memory that has already been deallocated. This use-after-free vulnerability can lead to system instability, causing a denial of service (DoS) by crashing the system."], "name": "CVE-2026-64424", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "important", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64424\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64424\nhttps://lore.kernel.org/linux-cve-announce/2026072535-CVE-2026-64424-5caa@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[38e6bc185d9544dfad1774b3f8902a0b061aea25,95ecc5b58042f6b6743b589e6588f1cd7ba336aa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[38e6bc185d9544dfad1774b3f8902a0b061aea25,a33f37f8d079da7236ed7b7e2aed2a34ab81e7cf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[38e6bc185d9544dfad1774b3f8902a0b061aea25,5ed09a108d93a3b002cc79823d9455b50c4a8be7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[38e6bc185d9544dfad1774b3f8902a0b061aea25,45f1458a85017a023f138b22ac5c76abd477db42)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,3.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-25T22:15:03.725095+00:00", "updated": "2026-08-03T18:45:17.781044+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}