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vuln-cve/data/2025/22xxx/CVE-2025-22057.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-22057",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-12-29T08:45:45.812Z",
"datePublished": "2025-04-16T14:12:14.234Z",
"dateUpdated": "2026-10-30T12:21:11.424Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-30T12:21:11.424Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: decrease cached dst counters in dst_release\n\nUpstream fix ac888d58869b (\"net: do not delay dst_entries_add() in\ndst_release()\") moved decrementing the dst count from dst_destroy to\ndst_release to avoid accessing already freed data in case of netns\ndismantle. However in case CONFIG_DST_CACHE is enabled and OvS+tunnels\nare used, this fix is incomplete as the same issue will be seen for\ncached dsts:\n\n Unable to handle kernel paging request at virtual address ffff5aabf6b5c000\n Call trace:\n percpu_counter_add_batch+0x3c/0x160 (P)\n dst_release+0xec/0x108\n dst_cache_destroy+0x68/0xd8\n dst_destroy+0x13c/0x168\n dst_destroy_rcu+0x1c/0xb0\n rcu_do_batch+0x18c/0x7d0\n rcu_core+0x174/0x378\n rcu_core_si+0x18/0x30\n\nFix this by invalidating the cache, and thus decrementing cached dst\ncounters, in dst_release too."
}
],
"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 - Triggering requires local configuration of a metadata tunnel (tc `action tunnel_key set`, nft tunnel object, or OVS set_tunnel) via netlink plus a network-namespace dismantle; received packets alone cannot populate the dst_cache since RX-allocated tun_dsts have no cache initialized.\nAC:L - The attacker controls both sides — they configure the cached tunnel dst and they trigger the netns teardown that frees the percpu counter — and `cleanup_net()` performs no rcu_barrier() between device-op exit (which queues dst_destroy_rcu) and ip6_route_net_exit(), so the window is wide and the whole sequence can be repeated in a loop until it lands.\nPR:L - tc actions, nftables tunnel objects, tunnel device creation and netns teardown are all gated by `netlink_net_capable(skb, CAP_NET_ADMIN)`, which checks against `sock_net(sk)->user_ns`, so an unprivileged local user obtains everything needed via `unshare -Urn`.\nUI:N - The attacker performs the entire sequence — namespace creation, tunnel/action setup, traffic generation, and namespace destruction — with no action by any other user.\nS:U - The use-after-free corrupts kernel memory within the same kernel security authority; no VM, IOMMU, or hypervisor boundary is crossed.\nC:H - `percpu_counter_add_batch()` reads freed percpu memory through the dangling `fbc->counters` pointer and folds that value into a kernel counter; per use-after-free scoring this yields potential disclosure of reclaimed kernel heap contents.\nI:H - The stale `this_cpu_write()` performs a use-after-free write into a freed percpu chunk that other percpu allocations can reclaim, corrupting unrelated kernel state (e.g. counters/refcounts) in an attacker-groomable way.\nA:H - The reported failure is a fatal kernel paging fault in `percpu_counter_add_batch()` from an RCU softirq callback, which panics or oopses the machine in unrecoverable context."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/core/dst.c"
],
"versions": [
{
"version": "d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8",
"lessThan": "973bb0bc6240b55e313248ef3c6aa551ab7bb735",
"status": "affected",
"versionType": "git"
},
{
"version": "d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8",
"lessThan": "ccc331fd5bcae131d2627d5ef099d4a1f6540aea",
"status": "affected",
"versionType": "git"
},
{
"version": "d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8",
"lessThan": "92a5c18513117be69bc00419dd1724c1940f8fcd",
"status": "affected",
"versionType": "git"
},
{
"version": "d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8",
"lessThan": "836415a8405c9665ae55352fc5ba865c242f5e4f",
"status": "affected",
"versionType": "git"
},
{
"version": "d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8",
"lessThan": "e833e7ad64eb2f63867f65303be49ca30ee8819e",
"status": "affected",
"versionType": "git"
},
{
"version": "d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8",
"lessThan": "3a0a3ff6593d670af2451ec363ccb7b18aec0c0a",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/core/dst.c"
],
"versions": [
{
"version": "4.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.6",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.87",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.23",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.13.11",
"lessThanOrEqual": "6.13.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.14.2",
"lessThanOrEqual": "6.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.15",
"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": "4.6",
"versionEndExcluding": "6.1.191"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "6.6.87"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "6.12.23"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "6.13.11"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "6.14.2"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "6.15"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/973bb0bc6240b55e313248ef3c6aa551ab7bb735"
},
{
"url": "https://git.kernel.org/stable/c/ccc331fd5bcae131d2627d5ef099d4a1f6540aea"
},
{
"url": "https://git.kernel.org/stable/c/92a5c18513117be69bc00419dd1724c1940f8fcd"
},
{
"url": "https://git.kernel.org/stable/c/836415a8405c9665ae55352fc5ba865c242f5e4f"
},
{
"url": "https://git.kernel.org/stable/c/e833e7ad64eb2f63867f65303be49ca30ee8819e"
},
{
"url": "https://git.kernel.org/stable/c/3a0a3ff6593d670af2451ec363ccb7b18aec0c0a"
}
],
"title": "net: decrease cached dst counters in dst_release",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2025-22057",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-10-15T21:44:18.222733Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-15T21:51:57.256Z"
}
}
]
}
}
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