CVE-2024-56643
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
dccp: Fix memory leak in dccp_feat_change_recv
If dccp_feat_push_confirm() fails after new value for SP feature was accepted without reconciliation ('entry == NULL' branch), memory allocated for that value with dccp_feat_clone_sp_val() is never freed.
Here is the kmemleak stack for this:
Clean up the allocated memory in case of dccp_feat_push_confirm() failure and bail out with an error reset code.
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Detalles técnicos trazas, registros y código del informe original
unreferenced object 0xffff88801d4ab488 (size 8):
comm "syz-executor310", pid 1127, jiffies 4295085598 (age 41.666s)
hex dump (first 8 bytes):
01 b4 4a 1d 80 88 ff ff ..J.....
backtrace:
[<00000000db7cabfe>] kmemdup+0x23/0x50 mm/util.c:128
[<0000000019b38405>] kmemdup include/linux/string.h:465 [inline]
[<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:371 [inline]
[<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:367 [inline]
[<0000000019b38405>] dccp_feat_change_recv net/dccp/feat.c:1145 [inline]
[<0000000019b38405>] dccp_feat_parse_options+0x1196/0x2180 net/dccp/feat.c:1416
[<00000000b1f6d94a>] dccp_parse_options+0xa2a/0x1260 net/dccp/options.c:125
[<0000000030d7b621>] dccp_rcv_state_process+0x197/0x13d0 net/dccp/input.c:650
[<000000001f74c72e>] dccp_v4_do_rcv+0xf9/0x1a0 net/dccp/ipv4.c:688
[<00000000a6c24128>] sk_backlog_rcv include/net/sock.h:1041 [inline]
[<00000000a6c24128>] __release_sock+0x139/0x3b0 net/core/sock.c:2570
[<00000000cf1f3a53>] release_sock+0x54/0x1b0 net/core/sock.c:3111
[<000000008422fa23>] inet_wait_for_connect net/ipv4/af_inet.c:603 [inline]
[<000000008422fa23>] __inet_stream_connect+0x5d0/0xf70 net/ipv4/af_inet.c:696
[<0000000015b6f64d>] inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:735
[<0000000010122488>] __sys_connect_file+0x15c/0x1a0 net/socket.c:1865
[<00000000b4b70023>] __sys_connect+0x165/0x1a0 net/socket.c:1882
[<00000000f4cb3815>] __do_sys_connect net/socket.c:1892 [inline]
[<00000000f4cb3815>] __se_sys_connect net/socket.c:1889 [inline]
[<00000000f4cb3815>] __x64_sys_connect+0x6e/0xb0 net/socket.c:1889
[<00000000e7b1e839>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
[<0000000055e91434>] entry_SYSCALL_64_after_hwframe+0x67/0xd1CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.23%
- Percentil entre todas las CVEs puntuadas: 13
- Fecha de la puntuación: 6/10/2026
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)
CWE
- CWE-401
- CWE-401
Referencias
- https://git.kernel.org/stable/c/22be4727a8f898442066bcac34f8a1ad0bc72e14
- https://git.kernel.org/stable/c/623be080ab3c13d71570bd32f7202a8efa8e2252
- https://git.kernel.org/stable/c/6ff67909ee2ffad911e3122616df41dee23ff4f6
- https://git.kernel.org/stable/c/9ee68b0f23706a77f53c832457b9384178b76421
- https://git.kernel.org/stable/c/bc3d4423def1a9412a0ae454cb4477089ab79276
- https://git.kernel.org/stable/c/c99507fff94b926fc92279c92d80f229c91cb85d
- https://git.kernel.org/stable/c/d3ec686a369fae5034303061f003cd3f94ddfd23
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
JSON original (NVD)
Mostrar
{
"id": "CVE-2024-56643",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-56643",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2025-04-17T20:10:38.316606Z"
}
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 3.3,
"attackVector": "LOCAL",
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "LOW",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 1.4,
"exploitabilityScore": 1.8
}
]
},
"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": "e77b8363b2ea7c0d89919547c1a8b0562f298b57",
"lessThan": "623be080ab3c13d71570bd32f7202a8efa8e2252",
"versionType": "git"
},
{
"status": "affected",
"version": "e77b8363b2ea7c0d89919547c1a8b0562f298b57",
"lessThan": "c99507fff94b926fc92279c92d80f229c91cb85d",
"versionType": "git"
},
{
"status": "affected",
"version": "e77b8363b2ea7c0d89919547c1a8b0562f298b57",
"lessThan": "bc3d4423def1a9412a0ae454cb4477089ab79276",
"versionType": "git"
},
{
"status": "affected",
"version": "e77b8363b2ea7c0d89919547c1a8b0562f298b57",
"lessThan": "6ff67909ee2ffad911e3122616df41dee23ff4f6",
"versionType": "git"
},
{
"status": "affected",
"version": "e77b8363b2ea7c0d89919547c1a8b0562f298b57",
"lessThan": "d3ec686a369fae5034303061f003cd3f94ddfd23",
"versionType": "git"
},
{
"status": "affected",
"version": "e77b8363b2ea7c0d89919547c1a8b0562f298b57",
"lessThan": "9ee68b0f23706a77f53c832457b9384178b76421",
"versionType": "git"
},
{
"status": "affected",
"version": "e77b8363b2ea7c0d89919547c1a8b0562f298b57",
"lessThan": "22be4727a8f898442066bcac34f8a1ad0bc72e14",
"versionType": "git"
}
],
"programFiles": [
"net/dccp/feat.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.29"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.29",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.287",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.231",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.174",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.120",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.66",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.5",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/dccp/feat.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2024-12-27T15:15:24.040",
"references": [
{
"url": "https://git.kernel.org/stable/c/22be4727a8f898442066bcac34f8a1ad0bc72e14",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/623be080ab3c13d71570bd32f7202a8efa8e2252",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6ff67909ee2ffad911e3122616df41dee23ff4f6",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9ee68b0f23706a77f53c832457b9384178b76421",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bc3d4423def1a9412a0ae454cb4477089ab79276",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c99507fff94b926fc92279c92d80f229c91cb85d",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d3ec686a369fae5034303061f003cd3f94ddfd23",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-401"
}
]
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-401"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndccp: Fix memory leak in dccp_feat_change_recv\n\nIf dccp_feat_push_confirm() fails after new value for SP feature was accepted\nwithout reconciliation ('entry == NULL' branch), memory allocated for that value\nwith dccp_feat_clone_sp_val() is never freed.\n\nHere is the kmemleak stack for this:\n\nunreferenced object 0xffff88801d4ab488 (size 8):\n comm \"syz-executor310\", pid 1127, jiffies 4295085598 (age 41.666s)\n hex dump (first 8 bytes):\n 01 b4 4a 1d 80 88 ff ff ..J.....\n backtrace:\n [<00000000db7cabfe>] kmemdup+0x23/0x50 mm/util.c:128\n [<0000000019b38405>] kmemdup include/linux/string.h:465 [inline]\n [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:371 [inline]\n [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:367 [inline]\n [<0000000019b38405>] dccp_feat_change_recv net/dccp/feat.c:1145 [inline]\n [<0000000019b38405>] dccp_feat_parse_options+0x1196/0x2180 net/dccp/feat.c:1416\n [<00000000b1f6d94a>] dccp_parse_options+0xa2a/0x1260 net/dccp/options.c:125\n [<0000000030d7b621>] dccp_rcv_state_process+0x197/0x13d0 net/dccp/input.c:650\n [<000000001f74c72e>] dccp_v4_do_rcv+0xf9/0x1a0 net/dccp/ipv4.c:688\n [<00000000a6c24128>] sk_backlog_rcv include/net/sock.h:1041 [inline]\n [<00000000a6c24128>] __release_sock+0x139/0x3b0 net/core/sock.c:2570\n [<00000000cf1f3a53>] release_sock+0x54/0x1b0 net/core/sock.c:3111\n [<000000008422fa23>] inet_wait_for_connect net/ipv4/af_inet.c:603 [inline]\n [<000000008422fa23>] __inet_stream_connect+0x5d0/0xf70 net/ipv4/af_inet.c:696\n [<0000000015b6f64d>] inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:735\n [<0000000010122488>] __sys_connect_file+0x15c/0x1a0 net/socket.c:1865\n [<00000000b4b70023>] __sys_connect+0x165/0x1a0 net/socket.c:1882\n [<00000000f4cb3815>] __do_sys_connect net/socket.c:1892 [inline]\n [<00000000f4cb3815>] __se_sys_connect net/socket.c:1889 [inline]\n [<00000000f4cb3815>] __x64_sys_connect+0x6e/0xb0 net/socket.c:1889\n [<00000000e7b1e839>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46\n [<0000000055e91434>] entry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nClean up the allocated memory in case of dccp_feat_push_confirm() failure\nand bail out with an error reset code.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dccp: Se corrige la pérdida de memoria en dccp_feat_change_recv Si dccp_feat_push_confirm() falla después de que se aceptó un nuevo valor para la característica SP sin conciliación (rama 'entry == NULL'), la memoria asignada para ese valor con dccp_feat_clone_sp_val() nunca se libera. Aquí está la pila kmemleak para esto: objeto sin referencia 0xffff88801d4ab488 (tamaño 8): comm \"syz-executor310\", pid 1127, jiffies 4295085598 (edad 41.666s) volcado hexadecimal (primeros 8 bytes): 01 b4 4a 1d 80 88 ff ff ..J..... backtrace: [<00000000db7cabfe>] kmemdup+0x23/0x50 mm/util.c:128 [<0000000019b38405>] kmemdup include/linux/string.h:465 [en línea] [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:371 [en línea] [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:367 [en línea] [<0000000019b38405>] dccp_feat_change_recv net/dccp/feat.c:1145 [en línea] [<0000000019b38405>] dccp_feat_parse_options+0x1196/0x2180 net/dccp/feat.c:1416 [<00000000b1f6d94a>] dccp_parse_options+0xa2a/0x1260 net/dccp/options.c:125 [<0000000030d7b621>] dccp_rcv_state_process+0x197/0x13d0 red/dccp/input.c:650 [<000000001f74c72e>] dccp_v4_do_rcv+0xf9/0x1a0 red/dccp/ipv4.c:688 [<00000000a6c24128>] sk_backlog_rcv incluir/net/sock.h:1041 [en línea] [<00000000a6c24128>] __release_sock+0x139/0x3b0 red/core/sock.c:2570 [<00000000cf1f3a53>] release_sock+0x54/0x1b0 net/core/sock.c:3111 [<000000008422fa23>] espera_de_conexión inet net/ipv4/af_inet.c:603 [en línea] [<000000008422fa23>] __inet_stream_connect+0x5d0/0xf70 net/ipv4/af_inet.c:696 [<0000000015b6f64d>] inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:735 [<0000000010122488>] archivo_de_conexión_sys+0x15c/0x1a0 net/socket.c:1865 [<00000000b4b70023>] __sys_connect+0x165/0x1a0 red/socket.c:1882 [<00000000f4cb3815>] __do_sys_connect red/socket.c:1892 [en línea] [<00000000f4cb3815>] __se_sys_connect red/socket.c:1889 [en línea] [<00000000f4cb3815>] __x64_sys_connect+0x6e/0xb0 red/socket.c:1889 [<00000000e7b1e839>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<0000000055e91434>] entry_SYSCALL_64_after_hwframe+0x67/0xd1 Limpia la memoria asignada en caso de que dccp_feat_push_confirm() falle y se resuelve con un código de reinicio de error. Encontrado por Linux Verification Center (linuxtesting.org) con Syzkaller."
}
],
"lastModified": "2026-06-17T08:12:37.623",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1298C84F-E296-4E2D-8B96-829D4E94588D",
"versionEndExcluding": "5.4.287",
"versionStartIncluding": "2.6.29"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B5C644CC-2BD7-4E32-BC54-8DCC7ABE9935",
"versionEndExcluding": "5.10.231",
"versionStartIncluding": "5.5"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "419FD073-1517-4FD5-8158-F94BC68A1E89",
"versionEndExcluding": "5.15.174",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "09AC6122-E2A4-40FE-9D33-268A1B2EC265",
"versionEndExcluding": "6.1.120",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "29A976AD-B9AB-4A95-9F08-7669F8847EB9",
"versionEndExcluding": "6.6.66",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9501D045-7A94-42CA-8B03-821BE94A65B7",
"versionEndExcluding": "6.12.5",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}