{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64188", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.040Z", "datePublished": "2026-07-20T16:27:47.216Z", "dateUpdated": "2026-07-27T04:58:35.734Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-27T04:58:35.734Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()\n\nrmnet_dellink() removes the endpoint from the hash table with\nhlist_del_init_rcu() and then immediately frees it with kfree(). However,\nRCU readers on the receive path (rmnet_rx_handler ->\n__rmnet_map_ingress_handler) may still hold a reference to the endpoint and\ndereference ep->egress_dev after the memory has been freed. The endpoint is\na kmalloc-32 object, and the stale read at offset 8 corresponds to the\negress_dev pointer.\n\n BUG: unable to handle page fault for address: ffffffffde942eef\n Oops: 0002 [#1] SMP NOPTI\n CPU: 1 UID: 0 PID: 137 Comm: poc_write Not tainted 7.0.0+ #4 PREEMPTLAZY\n RIP: 0010:rmnet_vnd_rx_fixup (rmnet_vnd.c:27)\n Call Trace:\n <TASK>\n __rmnet_map_ingress_handler (rmnet_handlers.c:48 rmnet_handlers.c:101)\n rmnet_rx_handler (rmnet_handlers.c:129 rmnet_handlers.c:235)\n __netif_receive_skb_core.constprop.0 (net/core/dev.c:6096)\n __netif_receive_skb_one_core (net/core/dev.c:6208)\n netif_receive_skb (net/core/dev.c:6467)\n tun_get_user (drivers/net/tun.c:1955)\n tun_chr_write_iter (drivers/net/tun.c:2003)\n vfs_write (fs/read_write.c:688)\n ksys_write (fs/read_write.c:740)\n </TASK>\n\nAdd an rcu_head field to struct rmnet_endpoint and replace kfree() with\nkfree_rcu() so the endpoint memory remains valid through the RCU grace\nperiod. Also remove the rmnet_vnd_dellink() call and inline only the\nnr_rmnet_devs decrement, since rmnet_vnd_dellink() would set\nep->egress_dev to NULL during the grace period, creating a data race\nwith lockless readers."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "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/rmnet/rmnet_config.c", "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h"], "versions": [{"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "c4e676c3505c5058922dc1a6f1ded795f6758135", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "9918698cf3aee4032e12bb42fd5a951dc465339b", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "310b93246bfec7d4452507e0c15477377ed9f025", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "1078ae8175777e80c9637996fb4a46c55f0ce576", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "41e06fcc5df0774d212e70c5b503fc769492bce3", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "8b17adf6d4fb6bf61fa4c3f58366a7c082799a71", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "f193e38cb257d033060b63f1cfd94af076b3a2ab", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "d00c953a8f69921f484b629801766da68f27f658", "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/rmnet/rmnet_config.c", "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h"], "versions": [{"version": "4.14", "status": "affected"}, {"version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.260", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.211", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.177", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.144", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.95", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.37", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.14", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "4.14", "versionEndExcluding": "5.10.260"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.211"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.177"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.6.144"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.12.95"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.18.37"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.0.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c4e676c3505c5058922dc1a6f1ded795f6758135"}, {"url": "https://git.kernel.org/stable/c/9918698cf3aee4032e12bb42fd5a951dc465339b"}, {"url": "https://git.kernel.org/stable/c/310b93246bfec7d4452507e0c15477377ed9f025"}, {"url": "https://git.kernel.org/stable/c/1078ae8175777e80c9637996fb4a46c55f0ce576"}, {"url": "https://git.kernel.org/stable/c/41e06fcc5df0774d212e70c5b503fc769492bce3"}, {"url": "https://git.kernel.org/stable/c/8b17adf6d4fb6bf61fa4c3f58366a7c082799a71"}, {"url": "https://git.kernel.org/stable/c/f193e38cb257d033060b63f1cfd94af076b3a2ab"}, {"url": "https://git.kernel.org/stable/c/d00c953a8f69921f484b629801766da68f27f658"}], "title": "net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()", "id": "2502875", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502875"}, "csaw": false, "cwe": "CWE-825", "details": ["A flaw was found in the Qualcomm rmnet driver within the Linux kernel. The `rmnet_dellink()` function improperly frees an endpoint while Read-Copy-Update (RCU) readers may still hold a reference to it. This use-after-free vulnerability allows a local attacker to trigger a system crash, resulting in a denial of service (DoS)."], "name": "CVE-2026-64188", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "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": "2026-07-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64188\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64188\nhttps://lore.kernel.org/linux-cve-announce/2026072051-CVE-2026-64188-ce95@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ceed73a2cf4aff2921802aa3d21d45280677547d,c4e676c3505c5058922dc1a6f1ded795f6758135)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ceed73a2cf4aff2921802aa3d21d45280677547d,9918698cf3aee4032e12bb42fd5a951dc465339b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ceed73a2cf4aff2921802aa3d21d45280677547d,310b93246bfec7d4452507e0c15477377ed9f025)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ceed73a2cf4aff2921802aa3d21d45280677547d,1078ae8175777e80c9637996fb4a46c55f0ce576)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ceed73a2cf4aff2921802aa3d21d45280677547d,41e06fcc5df0774d212e70c5b503fc769492bce3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ceed73a2cf4aff2921802aa3d21d45280677547d,8b17adf6d4fb6bf61fa4c3f58366a7c082799a71)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ceed73a2cf4aff2921802aa3d21d45280677547d,f193e38cb257d033060b63f1cfd94af076b3a2ab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ceed73a2cf4aff2921802aa3d21d45280677547d,d00c953a8f69921f484b629801766da68f27f658)"}}], "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": "semver", "value": "4.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.260,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.211,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.177,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.144,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.95,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.37,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.14,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-22T02:00:07.296903+00:00", "updated": "2026-07-26T07:15:17.651870+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}