{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-26950", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.198Z", "datePublished": "2024-05-01T05:18:29.902Z", "dateUpdated": "2026-08-05T11:28:30.984Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:28:30.984Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: netlink: access device through ctx instead of peer\n\nThe previous commit fixed a bug that led to a NULL peer->device being\ndereferenced. It's actually easier and faster performance-wise to\ninstead get the device from ctx->wg. This semantically makes more sense\ntoo, since ctx->wg->peer_allowedips.seq is compared with\nctx->allowedips_seq, basing them both in ctx. This also acts as a\ndefence in depth provision against freed peers." } ], "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 - The vulnerable code is reached only through the WireGuard generic-netlink family (`WG_CMD_GET_DEVICE` dump plus `WG_CMD_SET_DEVICE`), which requires a local netlink socket. Per kernel scoring guidance, netlink-driven configuration paths are Local.\nAC:L - The attacker controls both halves of the sequence — partially draining a multi-message dump, then replacing all peers to free the cursor peer, then resuming the same dump socket — so no uncontrolled timing window is involved and the upstream reproducer triggers it reliably.\nPR:L - The op is gated by `GENL_UNS_ADMIN_PERM`, i.e. `netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)`, which an unprivileged user obtains inside `unshare -Urn` where they can also create the wireguard interface. That is low privilege, not real root.\nUI:N - The entire sequence is performed by the attacker's own processes via netlink; no victim action, mount, or file open is required.\nS:U - The freed `wg_peer` and the corrupted/leaked data all live in the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `get_peer()` on a dangling peer copies freed slab contents — including `handshake.remote_static`, `preshared_key`, and endpoint data — straight into the netlink reply delivered to userspace, and a reallocated peer makes `peer->device` an attacker-influenced pointer that is then dereferenced, yielding an arbitrary read primitive.\nI:H - The same path performs `down_read()`/`up_read()` on the freed object, executing atomic read-modify-write operations into reclaimed slab memory; a use-after-free of this shape is exploitable via heap grooming for controlled writes and control-flow influence.\nA:H - In the common case the freed peer is zeroed by `memzero_explicit()`, making `peer->device->peer_allowedips.seq` a NULL pointer dereference and an immediate kernel oops, with the sibling report showing a KASAN slab-use-after-free on the same path." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireguard/netlink.c" ], "versions": [ { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "493aa6bdcffd90a4f82aa614fe4f4db0641b4068", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "4be453271a882c8ebc28df3dbf9e4d95e6ac42f5", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "09c3fa70f65175861ca948cb2f0f791e666c90e5", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "c991567e6c638079304cc15dff28748e4a3c4a37", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "93bcc1752c69bb309f4d8cfaf960ef1faeb34996", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "d44bd323d8bb8031eef4bdc44547925998a11e47", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "71cbd32e3db82ea4a74e3ef9aeeaa6971969c86f", "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/wireguard/netlink.c" ], "versions": [ { "version": "5.6", "status": "affected" }, { "version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.215", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.154", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.84", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.24", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.12", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.3", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "5.6", "versionEndExcluding": "5.10.215" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.15.154" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.1.84" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.6.24" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.7.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.8.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/493aa6bdcffd90a4f82aa614fe4f4db0641b4068" }, { "url": "https://git.kernel.org/stable/c/4be453271a882c8ebc28df3dbf9e4d95e6ac42f5" }, { "url": "https://git.kernel.org/stable/c/09c3fa70f65175861ca948cb2f0f791e666c90e5" }, { "url": "https://git.kernel.org/stable/c/c991567e6c638079304cc15dff28748e4a3c4a37" }, { "url": "https://git.kernel.org/stable/c/93bcc1752c69bb309f4d8cfaf960ef1faeb34996" }, { "url": "https://git.kernel.org/stable/c/d44bd323d8bb8031eef4bdc44547925998a11e47" }, { "url": "https://git.kernel.org/stable/c/71cbd32e3db82ea4a74e3ef9aeeaa6971969c86f" } ], "title": "wireguard: netlink: access device through ctx instead of peer", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-06T18:55:56.220490Z", "id": "CVE-2024-26950", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-11-07T15:00:58.528Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:21:05.839Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/493aa6bdcffd90a4f82aa614fe4f4db0641b4068", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/4be453271a882c8ebc28df3dbf9e4d95e6ac42f5", "tags": [ "x_transferred" ] }, { "url": 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