{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80992", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.811Z", "datePublished": "2026-09-11T19:42:48.855Z", "dateUpdated": "2026-10-19T08:46:16.688Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:46:16.688Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ravb: avoid dereferencing an invalid PTP clock\n\nThe PTP clock is unavailable before the first open, so querying its\nindex can dereference a NULL pointer. Registration failures can also\nleave an error pointer in priv->ptp.clock.\n\nCache the PHC index separately and report -1 while no clock is\nregistered. Normalize registration errors to NULL and preserve the\nstatic timestamping capabilities." } ], "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" }, "scenarios": [ { "lang": "en", "value": "AV:L - ravb_get_ts_info() is reached only via local SIOCETHTOOL ETHTOOL_GET_TS_INFO, ethtool netlink TSINFO_GET, SO_TIMESTAMPING BIND_PHC, or taprio setup on the ravb netdev. Received Ethernet/PTP packets never enter this path.\nAC:L - ethtool timestamp-info on a never-opened ravb interface deterministically calls ptp_clock_index(NULL), and after a normal open/close ravb_ptp_stop() leaves a dangling priv->ptp.clock that the same query dereferences. The attacker does not need a race or a rare config.\nPR:L - ETHTOOL_GET_TS_INFO is on the ethtool ioctl allow-list that skips CAP_NET_ADMIN, and ETHTOOL_MSG_TSINFO_GET has no GENL admin flag, so an unprivileged local user can trigger it. Interface cycling is privileged, but the down/never-opened state exists after normal system management.\nUI:N - The attacker issues the ethtool ioctl/netlink query (or SO_TIMESTAMPING BIND_PHC) directly against the existing ravb netdev. No separate victim action is required.\nS:U - The defect is in the ravb kernel Ethernet/PTP driver and impacts the same kernel. It is not a guest-to-host, IOMMU, or other cross-authority boundary bypass.\nC:H - After ndo_stop, ravb_ptp_stop() unregisters and kfree's struct ptp_clock via ptp_clock_release() but leaves priv->ptp.clock set, so a later ptp_clock_index() is a kernel heap UAF read. Kernel scoring treats UAFs as high confidentiality because freed-object reuse can yield disclosure primitives.\nI:H - The get_ts_info hit is a stale read of ptp_clock.index, but after close the object is a freed heap ptp_clock. Kernel scoring treats that UAF as high integrity impact because heap reuse can be leveraged toward write or control-flow primitives.\nA:H - Before first open, ptp_clock_index(NULL) oopses; a failed ptp_clock_register() leaves an ERR_PTR that is also dereferenced; and the post-close dangling pointer is a UAF that can panic. Any of these kernel crashes is high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/renesas/ravb.h", "drivers/net/ethernet/renesas/ravb_main.c", "drivers/net/ethernet/renesas/ravb_ptp.c" ], "versions": [ { "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c", "lessThan": "29ffd972531f8e6e0edf4ea3496190acff9fc9c2", "status": "affected", "versionType": "git" }, { "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c", "lessThan": "bf3308416a2be85dcc9965b614a745b40beeff14", "status": "affected", "versionType": "git" }, { "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c", "lessThan": "fc710f89a644e030a7ca15343176ca862fd61b9d", "status": "affected", "versionType": "git" }, { "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c", "lessThan": "8d4d06d6e2b501cb8e30ed3b1924c470358e8052", "status": "affected", "versionType": "git" }, { "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c", "lessThan": "0aaa53936419cf0c19c670387fc6d431e042a1b6", "status": "affected", "versionType": "git" }, { "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c", "lessThan": "1f77af0aaf277413ff32f6ff8c2c4282bd64c897", "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/renesas/ravb.h", "drivers/net/ethernet/renesas/ravb_main.c", "drivers/net/ethernet/renesas/ravb_ptp.c" ], "versions": [ { "version": "4.2", "status": "affected" }, { "version": "0", "lessThan": "4.2", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.4", "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": "4.2", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.12.109" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.18.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.2.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/29ffd972531f8e6e0edf4ea3496190acff9fc9c2" }, { "url": "https://git.kernel.org/stable/c/bf3308416a2be85dcc9965b614a745b40beeff14" }, { "url": "https://git.kernel.org/stable/c/fc710f89a644e030a7ca15343176ca862fd61b9d" }, { "url": "https://git.kernel.org/stable/c/8d4d06d6e2b501cb8e30ed3b1924c470358e8052" }, { "url": "https://git.kernel.org/stable/c/0aaa53936419cf0c19c670387fc6d431e042a1b6" }, { "url": "https://git.kernel.org/stable/c/1f77af0aaf277413ff32f6ff8c2c4282bd64c897" } ], "title": "net: ravb: avoid dereferencing an invalid PTP clock", "x_generator": { "engine": "bippy-1.2.0" } } } }