CVE-2026-64006
Estado: Pendiente de análisisSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_tables: fix dst corruption in same register operation
For lshift and rshift, the shift operations are performed in a loop over 32-bit words. The loop calculates the shifted value and write it to dst, and then immediately reads from src to calculate the carry for the next iteration. Because src and dst could point to the same memory location, the carry is incorrectly calculated using the newly modified dst value instead of the original src value.
Adding a temporary local variable to cache the original value before writing to dst and using it for the carry calculation solves the problem.
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In addition, partial overlap is rejected from control plane for all kind of operations including byteorder. This was tested with the following bytecode:
Detalles técnicos trazas, registros y código del informe original
table test_table ip flags 0 use 1 handle 1 ip test_table test_chain use 3 type filter hook input prio 0 policy accept packets 0 bytes 0 flags 1 ip test_table test_chain 2 [ immediate reg 1 0x44332211 0x88776655 ] [ bitwise reg 1 = ( reg 1 << 0x08000000 ) ] [ cmp eq reg 1 0x66443322 0x00887766 ] [ counter pkts 0 bytes 0 ] ip test_table test_chain 4 3 [ immediate reg 1 0x44332211 0x88776655 ] [ bitwise reg 1 = ( reg 1 << 0x08000000 ) ] [ cmp eq reg 1 0x55443322 0x00887766 ] [ counter pkts 21794 bytes 1917798 ]
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.17%
- Percentil entre todas las CVEs puntuadas: 6
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
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{
"id": "CVE-2026-64006",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "567d746b55bc66d3800c9ae91d50f0c5deb2fd93",
"lessThan": "b80ef316e978de2ef81d5bee9c19800b4cf96fb8",
"versionType": "git"
},
{
"status": "affected",
"version": "567d746b55bc66d3800c9ae91d50f0c5deb2fd93",
"lessThan": "96bea2a7baac4a1137c188dc7610184487ab30a7",
"versionType": "git"
},
{
"status": "affected",
"version": "567d746b55bc66d3800c9ae91d50f0c5deb2fd93",
"lessThan": "a391afe74398b70107f111aa731eab608624949d",
"versionType": "git"
},
{
"status": "affected",
"version": "567d746b55bc66d3800c9ae91d50f0c5deb2fd93",
"lessThan": "18014147d3ee7831dce53fe65d7fc8d428b02552",
"versionType": "git"
}
],
"programFiles": [
"include/net/netfilter/nf_tables.h",
"net/netfilter/nft_bitwise.c",
"net/netfilter/nft_byteorder.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.18.35",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.12",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/net/netfilter/nf_tables.h",
"net/netfilter/nft_bitwise.c",
"net/netfilter/nft_byteorder.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-07-19T16:17:40.297",
"references": [
{
"url": "https://git.kernel.org/stable/c/18014147d3ee7831dce53fe65d7fc8d428b02552",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/96bea2a7baac4a1137c188dc7610184487ab30a7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a391afe74398b70107f111aa731eab608624949d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b80ef316e978de2ef81d5bee9c19800b4cf96fb8",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Awaiting Analysis",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: fix dst corruption in same register operation\n\nFor lshift and rshift, the shift operations are performed in a loop over\n32-bit words. The loop calculates the shifted value and write it to dst,\nand then immediately reads from src to calculate the carry for the next\niteration. Because src and dst could point to the same memory location,\nthe carry is incorrectly calculated using the newly modified dst value\ninstead of the original src value.\n\nAdding a temporary local variable to cache the original value before\nwriting to dst and using it for the carry calculation solves the\nproblem. In addition, partial overlap is rejected from control plane for\nall kind of operations including byteorder. This was tested with the\nfollowing bytecode:\n\ntable test_table ip flags 0 use 1 handle 1\nip test_table test_chain use 3 type filter hook input prio 0 policy accept packets 0 bytes 0 flags 1\nip test_table test_chain 2\n [ immediate reg 1 0x44332211 0x88776655 ]\n [ bitwise reg 1 = ( reg 1 << 0x08000000 ) ]\n [ cmp eq reg 1 0x66443322 0x00887766 ]\n [ counter pkts 0 bytes 0 ]\nip test_table test_chain 4 3\n [ immediate reg 1 0x44332211 0x88776655 ]\n [ bitwise reg 1 = ( reg 1 << 0x08000000 ) ]\n [ cmp eq reg 1 0x55443322 0x00887766 ]\n [ counter pkts 21794 bytes 1917798 ]"
}
],
"lastModified": "2026-07-30T14:51:20.077",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}