CVE-2026-80744 (GCVE-0-2026-80744)
Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-09-03 08:26
VLAI
EPSS
VEX
Title
netfilter: nf_tables_offload: suppress WARN_ON_ONCE for ENOMEM in abort path
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_tables_offload: suppress WARN_ON_ONCE for ENOMEM in abort path
In nft_flow_rule_offload_abort(), WARN_ON_ONCE(err) is triggered on every
error during rollback, including -ENOMEM. Memory allocation failures are
expected under low-memory conditions and do not indicate a kernel bug.
Trace for example:
nft_flow_offload_chain() // FLOW_BLOCK_BIND
nft_flow_block_chain()
nft_chain_offload_cmd()
nft_block_offload_cmd()
->ndo_setup_tc()
nsim_setup_tc()
flow_block_cb_setup_simple()
flow_block_cb_alloc() // fails to -ENOMEM
The warning was reproduced on the 5.10 stable kernel under memory pressure
via fault injection, but the underlying bug exists in mainline as well,
as demonstrated by the ENOMEM trace above. The following splat was
triggered during nf_tables transaction processing:
WARNING: CPU: 0 PID: 8567 at net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_abort net/netfilter/nf_tables_offload.c:532 [inline]
WARNING: CPU: 0 PID: 8567 at net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_commit+0x971/0xcd0 net/netfilter/nf_tables_offload.c:591
Modules linked in:
CPU: 0 PID: 8567 Comm: syz-executor.0 Not tainted 5.10.260-syzkaller #0
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nft_flow_rule_offload_abort net/netfilter/nf_tables_offload.c:532 [inline]
RIP: 0010:nft_flow_rule_offload_commit+0x971/0xcd0 net/netfilter/nf_tables_offload.c:591
Call Trace:
nf_tables_commit+0x3bd/0x4bd0 net/netfilter/nf_tables_api.c:8604
nfnetlink_rcv_batch+0xb1e/0x1f20 net/netfilter/nfnetlink.c:509
nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:579 [inline]
nfnetlink_rcv+0x3b3/0x420 net/netfilter/nfnetlink.c:597
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x6cd/0xa00 net/netfilter/af_netlink.c:1340
netlink_sendmsg+0x906/0xe10 net/netfilter/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:651 [inline]
__sock_sendmsg+0x155/0x190 net/socket.c:663
____sys_sendmsg+0x705/0x870 net/socket.c:2379
___sys_sendmsg+0x100/0x170 net/socket.c:2433
__sys_sendmsg+0xe9/0x1c0 net/socket.c:2462
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x67/0xd1
Change the condition to WARN_ON_ONCE(err && err != -ENOMEM) so that
warnings are only emitted for unexpected errors. This aligns with the
common kernel practice of not warning on -ENOMEM.
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
63b48c73ff567bbab1f940d6e8f3f48607077a13 , < 2319033c4bf8bdb275a9e4e1f7af9bf8a457ad79
(git)
Affected: 63b48c73ff567bbab1f940d6e8f3f48607077a13 , < 6ee3803c22b72508c5baf1e5aecb21301b714be0 (git) Affected: 63b48c73ff567bbab1f940d6e8f3f48607077a13 , < 09bda4b6df222fd1819e8f188c3a6e90caf546d3 (git) Affected: 63b48c73ff567bbab1f940d6e8f3f48607077a13 , < 17c132e18ca5d1641ddbaed8d0e6ecfd1d38fa0b (git) Affected: 63b48c73ff567bbab1f940d6e8f3f48607077a13 , < 7ce9851be6f2b019e96e105a9de99715aec6deb4 (git) Affected: 63b48c73ff567bbab1f940d6e8f3f48607077a13 , < 4a923fe60939a194777bc605036ce2147ab00c9d (git) Affected: 63b48c73ff567bbab1f940d6e8f3f48607077a13 , < c23620a0fa5b1d80399f894c41a9f78bc29d6235 (git) Affected: 63b48c73ff567bbab1f940d6e8f3f48607077a13 , < d02f592064347e0c1e0d84f24941ad338838cc48 (git) |
guessed | |
| Linux | Linux |
Affected:
5.5
Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.153 , ≤ 6.6.* (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
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{
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"programFiles": [
"net/netfilter/nf_tables_offload.c"
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],
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"vendor": "Linux",
"versions": [
{
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"version": "5.5"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.10.266",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.184",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.153",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.105",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.46",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
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"versionStartIncluding": "5.5",
"vulnerable": true
},
{
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{
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{
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},
{
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},
{
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"versionEndExcluding": "6.18.46",
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"vulnerable": true
},
{
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},
{
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"versionEndExcluding": "7.2",
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"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables_offload: suppress WARN_ON_ONCE for ENOMEM in abort path\n\nIn nft_flow_rule_offload_abort(), WARN_ON_ONCE(err) is triggered on every\nerror during rollback, including -ENOMEM. Memory allocation failures are\nexpected under low-memory conditions and do not indicate a kernel bug.\n\nTrace for example:\nnft_flow_offload_chain() // FLOW_BLOCK_BIND\n nft_flow_block_chain()\n nft_chain_offload_cmd()\n nft_block_offload_cmd()\n -\u003endo_setup_tc()\n nsim_setup_tc()\n flow_block_cb_setup_simple()\n flow_block_cb_alloc() // fails to -ENOMEM\n\nThe warning was reproduced on the 5.10 stable kernel under memory pressure\nvia fault injection, but the underlying bug exists in mainline as well,\nas demonstrated by the ENOMEM trace above. The following splat was\ntriggered during nf_tables transaction processing:\n\nWARNING: CPU: 0 PID: 8567 at net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_abort net/netfilter/nf_tables_offload.c:532 [inline]\nWARNING: CPU: 0 PID: 8567 at net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_commit+0x971/0xcd0 net/netfilter/nf_tables_offload.c:591\nModules linked in:\nCPU: 0 PID: 8567 Comm: syz-executor.0 Not tainted 5.10.260-syzkaller #0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\nRIP: 0010:nft_flow_rule_offload_abort net/netfilter/nf_tables_offload.c:532 [inline]\nRIP: 0010:nft_flow_rule_offload_commit+0x971/0xcd0 net/netfilter/nf_tables_offload.c:591\nCall Trace:\n nf_tables_commit+0x3bd/0x4bd0 net/netfilter/nf_tables_api.c:8604\n nfnetlink_rcv_batch+0xb1e/0x1f20 net/netfilter/nfnetlink.c:509\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:579 [inline]\n nfnetlink_rcv+0x3b3/0x420 net/netfilter/nfnetlink.c:597\n netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]\n netlink_unicast+0x6cd/0xa00 net/netfilter/af_netlink.c:1340\n netlink_sendmsg+0x906/0xe10 net/netfilter/af_netlink.c:1919\n sock_sendmsg_nosec net/socket.c:651 [inline]\n __sock_sendmsg+0x155/0x190 net/socket.c:663\n ____sys_sendmsg+0x705/0x870 net/socket.c:2379\n ___sys_sendmsg+0x100/0x170 net/socket.c:2433\n __sys_sendmsg+0xe9/0x1c0 net/socket.c:2462\n do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46\n entry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nChange the condition to WARN_ON_ONCE(err \u0026\u0026 err != -ENOMEM) so that\nwarnings are only emitted for unexpected errors. This aligns with the\ncommon kernel practice of not warning on -ENOMEM.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-03T08:26:27.137Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/2319033c4bf8bdb275a9e4e1f7af9bf8a457ad79"
},
{
"url": "https://git.kernel.org/stable/c/6ee3803c22b72508c5baf1e5aecb21301b714be0"
},
{
"url": "https://git.kernel.org/stable/c/09bda4b6df222fd1819e8f188c3a6e90caf546d3"
},
{
"url": "https://git.kernel.org/stable/c/17c132e18ca5d1641ddbaed8d0e6ecfd1d38fa0b"
},
{
"url": "https://git.kernel.org/stable/c/7ce9851be6f2b019e96e105a9de99715aec6deb4"
},
{
"url": "https://git.kernel.org/stable/c/4a923fe60939a194777bc605036ce2147ab00c9d"
},
{
"url": "https://git.kernel.org/stable/c/c23620a0fa5b1d80399f894c41a9f78bc29d6235"
},
{
"url": "https://git.kernel.org/stable/c/d02f592064347e0c1e0d84f24941ad338838cc48"
}
],
"title": "netfilter: nf_tables_offload: suppress WARN_ON_ONCE for ENOMEM in abort path",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80744",
"datePublished": "2026-09-03T08:26:27.137Z",
"dateReserved": "2026-08-26T14:34:25.790Z",
"dateUpdated": "2026-09-03T08:26:27.137Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-80744",
"date": "2026-09-03",
"epss": "0.00226",
"percentile": "0.13193"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-80744\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-03T13:06:13.730\",\"lastModified\":\"2026-09-03T13:06:13.730\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_tables_offload: suppress WARN_ON_ONCE for ENOMEM in abort path\\n\\nIn nft_flow_rule_offload_abort(), WARN_ON_ONCE(err) is triggered on every\\nerror during rollback, including -ENOMEM. Memory allocation failures are\\nexpected under low-memory conditions and do not indicate a kernel bug.\\n\\nTrace for example:\\nnft_flow_offload_chain() // FLOW_BLOCK_BIND\\n nft_flow_block_chain()\\n nft_chain_offload_cmd()\\n nft_block_offload_cmd()\\n -\u003endo_setup_tc()\\n nsim_setup_tc()\\n flow_block_cb_setup_simple()\\n flow_block_cb_alloc() // fails to -ENOMEM\\n\\nThe warning was reproduced on the 5.10 stable kernel under memory pressure\\nvia fault injection, but the underlying bug exists in mainline as well,\\nas demonstrated by the ENOMEM trace above. The following splat was\\ntriggered during nf_tables transaction processing:\\n\\nWARNING: CPU: 0 PID: 8567 at net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_abort net/netfilter/nf_tables_offload.c:532 [inline]\\nWARNING: CPU: 0 PID: 8567 at net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_commit+0x971/0xcd0 net/netfilter/nf_tables_offload.c:591\\nModules linked in:\\nCPU: 0 PID: 8567 Comm: syz-executor.0 Not tainted 5.10.260-syzkaller #0\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\\nRIP: 0010:nft_flow_rule_offload_abort net/netfilter/nf_tables_offload.c:532 [inline]\\nRIP: 0010:nft_flow_rule_offload_commit+0x971/0xcd0 net/netfilter/nf_tables_offload.c:591\\nCall Trace:\\n nf_tables_commit+0x3bd/0x4bd0 net/netfilter/nf_tables_api.c:8604\\n nfnetlink_rcv_batch+0xb1e/0x1f20 net/netfilter/nfnetlink.c:509\\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:579 [inline]\\n nfnetlink_rcv+0x3b3/0x420 net/netfilter/nfnetlink.c:597\\n netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]\\n netlink_unicast+0x6cd/0xa00 net/netfilter/af_netlink.c:1340\\n netlink_sendmsg+0x906/0xe10 net/netfilter/af_netlink.c:1919\\n sock_sendmsg_nosec net/socket.c:651 [inline]\\n __sock_sendmsg+0x155/0x190 net/socket.c:663\\n ____sys_sendmsg+0x705/0x870 net/socket.c:2379\\n ___sys_sendmsg+0x100/0x170 net/socket.c:2433\\n __sys_sendmsg+0xe9/0x1c0 net/socket.c:2462\\n do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46\\n entry_SYSCALL_64_after_hwframe+0x67/0xd1\\n\\nChange the condition to WARN_ON_ONCE(err \u0026\u0026 err != -ENOMEM) so that\\nwarnings are only emitted for unexpected errors. This aligns with the\\ncommon kernel practice of not warning on -ENOMEM.\\n\\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/netfilter/nf_tables_offload.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"63b48c73ff567bbab1f940d6e8f3f48607077a13\",\"lessThan\":\"2319033c4bf8bdb275a9e4e1f7af9bf8a457ad79\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"63b48c73ff567bbab1f940d6e8f3f48607077a13\",\"lessThan\":\"6ee3803c22b72508c5baf1e5aecb21301b714be0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"63b48c73ff567bbab1f940d6e8f3f48607077a13\",\"lessThan\":\"09bda4b6df222fd1819e8f188c3a6e90caf546d3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"63b48c73ff567bbab1f940d6e8f3f48607077a13\",\"lessThan\":\"17c132e18ca5d1641ddbaed8d0e6ecfd1d38fa0b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"63b48c73ff567bbab1f940d6e8f3f48607077a13\",\"lessThan\":\"7ce9851be6f2b019e96e105a9de99715aec6deb4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"63b48c73ff567bbab1f940d6e8f3f48607077a13\",\"lessThan\":\"4a923fe60939a194777bc605036ce2147ab00c9d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"63b48c73ff567bbab1f940d6e8f3f48607077a13\",\"lessThan\":\"c23620a0fa5b1d80399f894c41a9f78bc29d6235\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"63b48c73ff567bbab1f940d6e8f3f48607077a13\",\"lessThan\":\"d02f592064347e0c1e0d84f24941ad338838cc48\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/netfilter/nf_tables_offload.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.266\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.217\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.153\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.105\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.46\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.10\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/09bda4b6df222fd1819e8f188c3a6e90caf546d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/17c132e18ca5d1641ddbaed8d0e6ecfd1d38fa0b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2319033c4bf8bdb275a9e4e1f7af9bf8a457ad79\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4a923fe60939a194777bc605036ce2147ab00c9d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6ee3803c22b72508c5baf1e5aecb21301b714be0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7ce9851be6f2b019e96e105a9de99715aec6deb4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c23620a0fa5b1d80399f894c41a9f78bc29d6235\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d02f592064347e0c1e0d84f24941ad338838cc48\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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