CVE-2026-23385 (GCVE-0-2026-23385)
Vulnerability from cvelistv5 – Published: 2026-03-25 10:28 – Updated: 2026-03-25 10:28
VLAI?
Title
netfilter: nf_tables: clone set on flush only
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_tables: clone set on flush only
Syzbot with fault injection triggered a failing memory allocation with
GFP_KERNEL which results in a WARN splat:
iter.err
WARNING: net/netfilter/nf_tables_api.c:845 at nft_map_deactivate+0x34e/0x3c0 net/netfilter/nf_tables_api.c:845, CPU#0: syz.0.17/5992
Modules linked in:
CPU: 0 UID: 0 PID: 5992 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:nft_map_deactivate+0x34e/0x3c0 net/netfilter/nf_tables_api.c:845
Code: 8b 05 86 5a 4e 09 48 3b 84 24 a0 00 00 00 75 62 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 63 6d fa f7 90 <0f> 0b 90 43
+80 7c 35 00 00 0f 85 23 fe ff ff e9 26 fe ff ff 89 d9
RSP: 0018:ffffc900045af780 EFLAGS: 00010293
RAX: ffffffff89ca45bd RBX: 00000000fffffff4 RCX: ffff888028111e40
RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000
RBP: ffffc900045af870 R08: 0000000000400dc0 R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff1d141db R12: ffffc900045af7e0
R13: 1ffff920008b5f24 R14: dffffc0000000000 R15: ffffc900045af920
FS: 000055557a6a5500(0000) GS:ffff888125496000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5ea271fc0 CR3: 000000003269e000 CR4: 00000000003526f0
Call Trace:
<TASK>
__nft_release_table+0xceb/0x11f0 net/netfilter/nf_tables_api.c:12115
nft_rcv_nl_event+0xc25/0xdb0 net/netfilter/nf_tables_api.c:12187
notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85
blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:380
netlink_release+0x123b/0x1ad0 net/netlink/af_netlink.c:761
__sock_release net/socket.c:662 [inline]
sock_close+0xc3/0x240 net/socket.c:1455
Restrict set clone to the flush set command in the preparation phase.
Add NFT_ITER_UPDATE_CLONE and use it for this purpose, update the rbtree
and pipapo backends to only clone the set when this iteration type is
used.
As for the existing NFT_ITER_UPDATE type, update the pipapo backend to
use the existing set clone if available, otherwise use the existing set
representation. After this update, there is no need to clone a set that
is being deleted, this includes bound anonymous set.
An alternative approach to NFT_ITER_UPDATE_CLONE is to add a .clone
interface and call it from the flush set path.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
3f1d886cc7c3525d4dbeee24bfa9bb3fe0d48ddc , < 9154945a6394029822bd08c24cef5a3f86d0424a
(git)
Affected: 3f1d886cc7c3525d4dbeee24bfa9bb3fe0d48ddc , < b7f67282ca2be14b727dd698b50e10cf5d8c66f9 (git) Affected: 3f1d886cc7c3525d4dbeee24bfa9bb3fe0d48ddc , < fb7fb4016300ac622c964069e286dc83166a5d52 (git) |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"include/net/netfilter/nf_tables.h",
"net/netfilter/nf_tables_api.c",
"net/netfilter/nft_set_hash.c",
"net/netfilter/nft_set_pipapo.c",
"net/netfilter/nft_set_rbtree.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "9154945a6394029822bd08c24cef5a3f86d0424a",
"status": "affected",
"version": "3f1d886cc7c3525d4dbeee24bfa9bb3fe0d48ddc",
"versionType": "git"
},
{
"lessThan": "b7f67282ca2be14b727dd698b50e10cf5d8c66f9",
"status": "affected",
"version": "3f1d886cc7c3525d4dbeee24bfa9bb3fe0d48ddc",
"versionType": "git"
},
{
"lessThan": "fb7fb4016300ac622c964069e286dc83166a5d52",
"status": "affected",
"version": "3f1d886cc7c3525d4dbeee24bfa9bb3fe0d48ddc",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"include/net/netfilter/nf_tables.h",
"net/netfilter/nf_tables_api.c",
"net/netfilter/nft_set_hash.c",
"net/netfilter/nft_set_pipapo.c",
"net/netfilter/nft_set_rbtree.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.10"
},
{
"lessThan": "6.10",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.17",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.7",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0-rc3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.17",
"versionStartIncluding": "6.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19.7",
"versionStartIncluding": "6.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0-rc3",
"versionStartIncluding": "6.10",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: clone set on flush only\n\nSyzbot with fault injection triggered a failing memory allocation with\nGFP_KERNEL which results in a WARN splat:\n\niter.err\nWARNING: net/netfilter/nf_tables_api.c:845 at nft_map_deactivate+0x34e/0x3c0 net/netfilter/nf_tables_api.c:845, CPU#0: syz.0.17/5992\nModules linked in:\nCPU: 0 UID: 0 PID: 5992 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026\nRIP: 0010:nft_map_deactivate+0x34e/0x3c0 net/netfilter/nf_tables_api.c:845\nCode: 8b 05 86 5a 4e 09 48 3b 84 24 a0 00 00 00 75 62 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 63 6d fa f7 90 \u003c0f\u003e 0b 90 43\n+80 7c 35 00 00 0f 85 23 fe ff ff e9 26 fe ff ff 89 d9\nRSP: 0018:ffffc900045af780 EFLAGS: 00010293\nRAX: ffffffff89ca45bd RBX: 00000000fffffff4 RCX: ffff888028111e40\nRDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000\nRBP: ffffc900045af870 R08: 0000000000400dc0 R09: 00000000ffffffff\nR10: dffffc0000000000 R11: fffffbfff1d141db R12: ffffc900045af7e0\nR13: 1ffff920008b5f24 R14: dffffc0000000000 R15: ffffc900045af920\nFS: 000055557a6a5500(0000) GS:ffff888125496000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fb5ea271fc0 CR3: 000000003269e000 CR4: 00000000003526f0\nCall Trace:\n \u003cTASK\u003e\n __nft_release_table+0xceb/0x11f0 net/netfilter/nf_tables_api.c:12115\n nft_rcv_nl_event+0xc25/0xdb0 net/netfilter/nf_tables_api.c:12187\n notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85\n blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:380\n netlink_release+0x123b/0x1ad0 net/netlink/af_netlink.c:761\n __sock_release net/socket.c:662 [inline]\n sock_close+0xc3/0x240 net/socket.c:1455\n\nRestrict set clone to the flush set command in the preparation phase.\nAdd NFT_ITER_UPDATE_CLONE and use it for this purpose, update the rbtree\nand pipapo backends to only clone the set when this iteration type is\nused.\n\nAs for the existing NFT_ITER_UPDATE type, update the pipapo backend to\nuse the existing set clone if available, otherwise use the existing set\nrepresentation. After this update, there is no need to clone a set that\nis being deleted, this includes bound anonymous set.\n\nAn alternative approach to NFT_ITER_UPDATE_CLONE is to add a .clone\ninterface and call it from the flush set path."
}
],
"providerMetadata": {
"dateUpdated": "2026-03-25T10:28:03.460Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/9154945a6394029822bd08c24cef5a3f86d0424a"
},
{
"url": "https://git.kernel.org/stable/c/b7f67282ca2be14b727dd698b50e10cf5d8c66f9"
},
{
"url": "https://git.kernel.org/stable/c/fb7fb4016300ac622c964069e286dc83166a5d52"
}
],
"title": "netfilter: nf_tables: clone set on flush only",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-23385",
"datePublished": "2026-03-25T10:28:03.460Z",
"dateReserved": "2026-01-13T15:37:46.008Z",
"dateUpdated": "2026-03-25T10:28:03.460Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-23385\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-03-25T11:16:38.773\",\"lastModified\":\"2026-03-25T15:41:33.977\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_tables: clone set on flush only\\n\\nSyzbot with fault injection triggered a failing memory allocation with\\nGFP_KERNEL which results in a WARN splat:\\n\\niter.err\\nWARNING: net/netfilter/nf_tables_api.c:845 at nft_map_deactivate+0x34e/0x3c0 net/netfilter/nf_tables_api.c:845, CPU#0: syz.0.17/5992\\nModules linked in:\\nCPU: 0 UID: 0 PID: 5992 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026\\nRIP: 0010:nft_map_deactivate+0x34e/0x3c0 net/netfilter/nf_tables_api.c:845\\nCode: 8b 05 86 5a 4e 09 48 3b 84 24 a0 00 00 00 75 62 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 63 6d fa f7 90 \u003c0f\u003e 0b 90 43\\n+80 7c 35 00 00 0f 85 23 fe ff ff e9 26 fe ff ff 89 d9\\nRSP: 0018:ffffc900045af780 EFLAGS: 00010293\\nRAX: ffffffff89ca45bd RBX: 00000000fffffff4 RCX: ffff888028111e40\\nRDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000\\nRBP: ffffc900045af870 R08: 0000000000400dc0 R09: 00000000ffffffff\\nR10: dffffc0000000000 R11: fffffbfff1d141db R12: ffffc900045af7e0\\nR13: 1ffff920008b5f24 R14: dffffc0000000000 R15: ffffc900045af920\\nFS: 000055557a6a5500(0000) GS:ffff888125496000(0000) knlGS:0000000000000000\\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 00007fb5ea271fc0 CR3: 000000003269e000 CR4: 00000000003526f0\\nCall Trace:\\n \u003cTASK\u003e\\n __nft_release_table+0xceb/0x11f0 net/netfilter/nf_tables_api.c:12115\\n nft_rcv_nl_event+0xc25/0xdb0 net/netfilter/nf_tables_api.c:12187\\n notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85\\n blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:380\\n netlink_release+0x123b/0x1ad0 net/netlink/af_netlink.c:761\\n __sock_release net/socket.c:662 [inline]\\n sock_close+0xc3/0x240 net/socket.c:1455\\n\\nRestrict set clone to the flush set command in the preparation phase.\\nAdd NFT_ITER_UPDATE_CLONE and use it for this purpose, update the rbtree\\nand pipapo backends to only clone the set when this iteration type is\\nused.\\n\\nAs for the existing NFT_ITER_UPDATE type, update the pipapo backend to\\nuse the existing set clone if available, otherwise use the existing set\\nrepresentation. After this update, there is no need to clone a set that\\nis being deleted, this includes bound anonymous set.\\n\\nAn alternative approach to NFT_ITER_UPDATE_CLONE is to add a .clone\\ninterface and call it from the flush set path.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/9154945a6394029822bd08c24cef5a3f86d0424a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b7f67282ca2be14b727dd698b50e10cf5d8c66f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fb7fb4016300ac622c964069e286dc83166a5d52\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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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