240 lines
12 KiB
JSON
240 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-68386",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-30T09:28:09.388Z",
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"datePublished": "2026-08-10T12:04:05.306Z",
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"dateUpdated": "2026-11-06T16:55:15.101Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-19T16:34:40.363Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Reject unhashed UDP sockets on sockmap update\n\nUDP sockets get SOCK_RCU_FREE set when (auto-)bound. This means\nsk_is_refcounted(unbound) = true, while sk_is_refcounted(bound) = false.\n\nBecause sockmap accepts unbound UDP sockets, a BPF program can increment a\nsocket's refcount via lookup. If the socket is subsequently bound, the\ntransition from unbound to bound causes bpf_sk_release() to skip the\ndecrement of the refcount, causing a memory leak.\n\nunreferenced object 0xffff88810bc2eb40 (size 1984):\n comm \"test_progs\", pid 2451, jiffies 4295320596\n hex dump (first 32 bytes):\n 7f 00 00 01 7f 00 00 01 d2 04 1b b7 04 d2 00 00 ................\n 02 00 01 40 00 00 00 00 00 00 00 00 00 00 00 00 ...@............\n backtrace (crc bdee079d):\n kmem_cache_alloc_noprof+0x557/0x660\n sk_prot_alloc+0x69/0x240\n sk_alloc+0x30/0x460\n inet_create+0x2ce/0xf80\n __sock_create+0x25b/0x5c0\n __sys_socket+0x119/0x1d0\n __x64_sys_socket+0x72/0xd0\n do_syscall_64+0xa1/0x5f0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nInstead of special-casing for refcounted sockets, reject unhashed UDP\nsockets during sockmap updates, as there is no benefit to supporting those.\nThis effectively reverts the commit under Fixes, with two exceptions:\n\n1. sock_map_sk_state_allowed() maintains a fall-through `return true`.\n2. In the spirit of commit b8b8315e39ff (\"bpf, sockmap: Remove unhash\n handler for BPF sockmap usage\"), the proto::unhash BPF handler is not\n reintroduced.\n\nHistorical note: this issue is related to commit 67312adc96b5 (\"bpf: reject\nunhashed sockets in bpf_sk_assign\")."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/core/sock_map.c"
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],
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"versions": [
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{
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"version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
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"lessThan": "2271276ac5279d2d204be7739a1a28d4ef6cf608",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
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"lessThan": "7ffe529e7127411806c8692fb1490f552c629dc2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
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"lessThan": "17b7ef6b86112a4e61cee1e9009a4b318e3225c5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
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"lessThan": "250474c69bc3fc48a5fc21d7c349f279caad947a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
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"lessThan": "8692655da369961128658cf8539334b6a960ecb0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
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"lessThan": "66efd3368ae10d05e08fbe6425b50fdec7186ac7",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/core/sock_map.c"
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],
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"versions": [
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{
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"version": "5.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.148",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.101",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.42",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.6",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "6.1.183"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2271276ac5279d2d204be7739a1a28d4ef6cf608"
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},
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{
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"url": "https://git.kernel.org/stable/c/7ffe529e7127411806c8692fb1490f552c629dc2"
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},
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{
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"url": "https://git.kernel.org/stable/c/17b7ef6b86112a4e61cee1e9009a4b318e3225c5"
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},
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{
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"url": "https://git.kernel.org/stable/c/250474c69bc3fc48a5fc21d7c349f279caad947a"
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},
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{
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"url": "https://git.kernel.org/stable/c/8692655da369961128658cf8539334b6a960ecb0"
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},
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{
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"url": "https://git.kernel.org/stable/c/66efd3368ae10d05e08fbe6425b50fdec7186ac7"
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}
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],
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"title": "bpf, sockmap: Reject unhashed UDP sockets on sockmap update",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-68386",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-06T16:48:28.442498Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-06T16:55:15.101Z"
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}
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}
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]
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}
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} |