CVE-2026-98849

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98849", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.375Z", "datePublished": "2026-10-18T15:50:48.743Z", "dateUpdated": "2026-10-19T09:26:41.559Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:26:41.559Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npfcp: fix socket lifetime on netdevice registration failure\n\npfcp_newlink() creates the UDP socket before register_netdevice().\nIf registration fails after pfcp_dev_init() succeeds, the core calls\npfcp_dev_uninit(), which releases the socket and clears pfcp->sk.\nThe newlink error path then releases it again, causing a NULL pointer\ndereference. This was observed with failslab fault injection:\n\n FAULT_INJECTION: forcing a failure.\n kobject: kobject_add_internal failed for pfcp0 (error: -12 parent: net)\n BUG: KASAN: null-ptr-deref in udp_tunnel_sock_release+0x1c/0x50\n Read of size 8 at addr 0000000000000120 by task ip/1037\n Call trace:\n show_stack+0x18/0x24 (C)\n dump_stack_lvl+0x78/0x90\n print_report+0x468/0x5cc\n kasan_report+0xa4/0xf0\n __asan_load8+0x7c/0xd0\n udp_tunnel_sock_release+0x1c/0x50\n pfcp_newlink+0x128/0x184\n rtnl_newlink+0x848/0xe44\n rtnetlink_rcv_msg+0x468/0x514\n netlink_rcv_skb+0xc0/0x1f0\n rtnetlink_rcv+0x18/0x24\n netlink_unicast+0x4b8/0x558\n netlink_sendmsg+0x2b8/0x584\n ...\n\nReturn from pfcp_del_sock() if pfcp->sk is NULL."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/pfcp.c"], "versions": [{"version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba", "lessThan": "dcb8f6a79c3360a440c399d85df465a6e59351f1", "status": "affected", "versionType": "git"}, {"version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba", "lessThan": "4b8ce1686dea1a10805a0807bf492409b0300ee1", "status": "affected", "versionType": "git"}, {"version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba", "lessThan": "2cee3603ec1d9b5ec7f2121ea3efe9488e906f46", "status": "affected", "versionType": "git"}, {"version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba", "lessThan": "0f17d2e3dd9cda3ee6d94033d5e5489af168920d", "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/pfcp.c"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.10", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1"}, {"url": "https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1"}, {"url": "https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46"}, {"url": "https://git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d"}], "title": "pfcp: fix socket lifetime on netdevice registration failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/pfcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "dcb8f6a79c3360a440c399d85df465a6e59351f1", "status": "affected", "version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba", "versionType": "git"}, {"lessThan": "4b8ce1686dea1a10805a0807bf492409b0300ee1", "status": "affected", "version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba", "versionType": "git"}, {"lessThan": "2cee3603ec1d9b5ec7f2121ea3efe9488e906f46", "status": "affected", "version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba", "versionType": "git"}, {"lessThan": "0f17d2e3dd9cda3ee6d94033d5e5489af168920d", "status": "affected", "version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/pfcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"lessThan": "6.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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\npfcp: fix socket lifetime on netdevice registration failure\n\npfcp_newlink() creates the UDP socket before register_netdevice().\nIf registration fails after pfcp_dev_init() succeeds, the core calls\npfcp_dev_uninit(), which releases the socket and clears pfcp->sk.\nThe newlink error path then releases it again, causing a NULL pointer\ndereference. This was observed with failslab fault injection:\n\n FAULT_INJECTION: forcing a failure.\n kobject: kobject_add_internal failed for pfcp0 (error: -12 parent: net)\n BUG: KASAN: null-ptr-deref in udp_tunnel_sock_release+0x1c/0x50\n Read of size 8 at addr 0000000000000120 by task ip/1037\n Call trace:\n show_stack+0x18/0x24 (C)\n dump_stack_lvl+0x78/0x90\n print_report+0x468/0x5cc\n kasan_report+0xa4/0xf0\n __asan_load8+0x7c/0xd0\n udp_tunnel_sock_release+0x1c/0x50\n pfcp_newlink+0x128/0x184\n rtnl_newlink+0x848/0xe44\n rtnetlink_rcv_msg+0x468/0x514\n netlink_rcv_skb+0xc0/0x1f0\n rtnetlink_rcv+0x18/0x24\n netlink_unicast+0x4b8/0x558\n netlink_sendmsg+0x2b8/0x584\n ...\n\nReturn from pfcp_del_sock() if pfcp->sk is NULL."}], "id": "CVE-2026-98849", "lastModified": "2026-10-19T10:19:49.007", "metrics": {}, "published": "2026-10-18T16:17:39.283", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: pfcp: fix socket lifetime on netdevice registration failure", "id": "2555251", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555251"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\npfcp: fix socket lifetime on netdevice registration failure\npfcp_newlink() creates the UDP socket before register_netdevice().\nIf registration fails after pfcp_dev_init() succeeds, the core calls\npfcp_dev_uninit(), which releases the socket and clears pfcp->sk.\nThe newlink error path then releases it again, causing a NULL pointer\ndereference. This was observed with failslab fault injection:\nFAULT_INJECTION: forcing a failure.\nkobject: kobject_add_internal failed for pfcp0 (error: -12 parent: net)\nBUG: KASAN: null-ptr-deref in udp_tunnel_sock_release+0x1c/0x50\nRead of size 8 at addr 0000000000000120 by task ip/1037\nCall trace:\nshow_stack+0x18/0x24 (C)\ndump_stack_lvl+0x78/0x90\nprint_report+0x468/0x5cc\nkasan_report+0xa4/0xf0\n__asan_load8+0x7c/0xd0\nudp_tunnel_sock_release+0x1c/0x50\npfcp_newlink+0x128/0x184\nrtnl_newlink+0x848/0xe44\nrtnetlink_rcv_msg+0x468/0x514\nnetlink_rcv_skb+0xc0/0x1f0\nrtnetlink_rcv+0x18/0x24\nnetlink_unicast+0x4b8/0x558\nnetlink_sendmsg+0x2b8/0x584\n...\nReturn from pfcp_del_sock() if pfcp->sk is NULL.", "A flaw was found in the Linux kernel's Packet Forwarding Control Protocol (PFCP) driver. When creating a PFCP network interface, a failure during device registration triggers error handling that attempts to release an internal network socket twice. This improper cleanup results in a null pointer dereference, allowing a local user with network administration privileges to crash the system and cause a Denial of Service (DoS)."], "name": "CVE-2026-98849", "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:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98849\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98849\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98849.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[76c8764ef36a5d37ea2e551bda28ac7f028383ba,dcb8f6a79c3360a440c399d85df465a6e59351f1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[76c8764ef36a5d37ea2e551bda28ac7f028383ba,4b8ce1686dea1a10805a0807bf492409b0300ee1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[76c8764ef36a5d37ea2e551bda28ac7f028383ba,2cee3603ec1d9b5ec7f2121ea3efe9488e906f46)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[76c8764ef36a5d37ea2e551bda28ac7f028383ba,0f17d2e3dd9cda3ee6d94033d5e5489af168920d)"}}], "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": "[6.10,6.10]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.113,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.56,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.10,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "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": "2026-10-18T21:15:14.282855+00:00", "updated": "2026-10-24T03:00:11.729501+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}