CVE-2024-49936 (GCVE-0-2024-49936)
Vulnerability from cvelistv5 – Published: 2024-10-21 18:01 – Updated: 2026-08-05 11:40
VLAI
EPSS
VEX
Title
net/xen-netback: prevent UAF in xenvif_flush_hash()
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/xen-netback: prevent UAF in xenvif_flush_hash()
During the list_for_each_entry_rcu iteration call of xenvif_flush_hash,
kfree_rcu does not exist inside the rcu read critical section, so if
kfree_rcu is called when the rcu grace period ends during the iteration,
UAF occurs when accessing head->next after the entry becomes free.
Therefore, to solve this, you need to change it to list_for_each_entry_safe.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 13:38 UTC
Assigner
References
10 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
40d8abdee806d496a60ee607a6d01b1cd7fabaf0 , < 3c4423b0c4b98213b3438e15061e1d08220e6982
(git)
Affected: 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 , < a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c (git) Affected: 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 , < a0465723b8581cad27164c9073fd780904cd22d4 (git) Affected: 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 , < efcff6ce7467f01f0753609f420333f3f2ceceda (git) Affected: 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 , < 143edf098b80669d05245b2f2367dd156a83a2c5 (git) Affected: 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 , < d408889d4b54f5501e4becc4dbbb9065143fbf4e (git) Affected: 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 , < 54d8639af5568fc41c0e274fc3ec9cf86c59fcbb (git) Affected: 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 , < 0fa5e94a1811d68fbffa0725efe6d4ca62c03d12 (git) |
guessed | |
| Linux | Linux |
Affected:
4.7
Unaffected: 0 , < 4.7 (semver) Unaffected: 5.4.290 , ≤ 5.4.* (semver) Unaffected: 5.10.227 , ≤ 5.10.* (semver) Unaffected: 5.15.168 , ≤ 5.15.* (semver) Unaffected: 6.1.113 , ≤ 6.1.* (semver) Unaffected: 6.6.55 , ≤ 6.6.* (semver) Unaffected: 6.10.14 , ≤ 6.10.* (semver) Unaffected: 6.11.3 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2024-49936",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-10-22T13:38:23.774447Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-10-22T13:38:51.250Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-03T22:23:20.627Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/xen-netback/hash.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "3c4423b0c4b98213b3438e15061e1d08220e6982",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "a0465723b8581cad27164c9073fd780904cd22d4",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "efcff6ce7467f01f0753609f420333f3f2ceceda",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "143edf098b80669d05245b2f2367dd156a83a2c5",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "d408889d4b54f5501e4becc4dbbb9065143fbf4e",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "54d8639af5568fc41c0e274fc3ec9cf86c59fcbb",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "0fa5e94a1811d68fbffa0725efe6d4ca62c03d12",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/xen-netback/hash.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"lessThan": "4.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.290",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.227",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.168",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.113",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.55",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.10.*",
"status": "unaffected",
"version": "6.10.14",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.11.*",
"status": "unaffected",
"version": "6.11.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.12",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.290",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.227",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.168",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.113",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.55",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.10.14",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.11.3",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12",
"versionStartIncluding": "4.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/xen-netback: prevent UAF in xenvif_flush_hash()\n\nDuring the list_for_each_entry_rcu iteration call of xenvif_flush_hash,\nkfree_rcu does not exist inside the rcu read critical section, so if\nkfree_rcu is called when the rcu grace period ends during the iteration,\nUAF occurs when accessing head-\u003enext after the entry becomes free.\n\nTherefore, to solve this, you need to change it to list_for_each_entry_safe."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The trigger is a `XEN_NETIF_CTRL_TYPE_SET_HASH_KEY` request written into the Xen shared-memory control ring by the guest frontend, or control-ring teardown \u2014 a local shared-memory interface from a guest VM, not a network protocol. No remote packet path reaches `xenvif_flush_hash()`.\nAC:L - A malicious guest fully controls both sides: it can keep the 64-entry cache populated with distinct flows and issue SET_HASH_KEY control requests in an unbounded tight loop, retrying the RCU-timing window arbitrarily many times per second with no host-side rate limit.\nPR:L - The attacker needs kernel/root control of a guest domU that has been granted a vif by the host toolstack, i.e. a low, host-conferred privilege relative to the vulnerable dom0 component \u2014 matching this repo\u0027s convention for guest-to-host issues such as CVE-2025-22012.\nUI:N - The guest drives the control ring entirely on its own; no dom0 administrator or user action is required at any point in the path.\nS:C - The vulnerable code executes in the dom0/driver-domain kernel while the attacker resides in an untrusted guest, so successful exploitation crosses the Xen VM/host security boundary.\nC:H - Use-after-free traversal reads `link.next` and entry fields out of freed, reclaimable heap memory in the host kernel, which an attacker who reallocates the slab can leverage into disclosure of host kernel data.\nI:H - After following a stale pointer, `list_del_rcu()` writes through attacker-influenceable `prev-\u003enext`/`next-\u003eprev` and `kfree_rcu()` is invoked on a bogus pointer, yielding a host-kernel write primitive suitable for control-flow hijacking.\nA:H - Dereferencing freed list memory in a dom0 IRQ-thread context with the cache spinlock held causes an oops or panic of the host kernel, taking down every VM on the machine."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T11:40:33.247Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/3c4423b0c4b98213b3438e15061e1d08220e6982"
},
{
"url": "https://git.kernel.org/stable/c/a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c"
},
{
"url": "https://git.kernel.org/stable/c/a0465723b8581cad27164c9073fd780904cd22d4"
},
{
"url": "https://git.kernel.org/stable/c/efcff6ce7467f01f0753609f420333f3f2ceceda"
},
{
"url": "https://git.kernel.org/stable/c/143edf098b80669d05245b2f2367dd156a83a2c5"
},
{
"url": "https://git.kernel.org/stable/c/d408889d4b54f5501e4becc4dbbb9065143fbf4e"
},
{
"url": "https://git.kernel.org/stable/c/54d8639af5568fc41c0e274fc3ec9cf86c59fcbb"
},
{
"url": "https://git.kernel.org/stable/c/0fa5e94a1811d68fbffa0725efe6d4ca62c03d12"
}
],
"title": "net/xen-netback: prevent UAF in xenvif_flush_hash()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-49936",
"datePublished": "2024-10-21T18:01:57.066Z",
"dateReserved": "2024-10-21T12:17:06.042Z",
"dateUpdated": "2026-08-05T11:40:33.247Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2024-49936",
"date": "2026-11-14",
"epss": "0.00273",
"percentile": "0.19924"
},
"microsoft_vex": {
"current_release_date": "2026-02-18T02:31:25.000Z",
"cve": "CVE-2024-49936",
"id": "msrc_CVE-2024-49936",
"initial_release_date": "2024-10-01T07:00:00.000Z",
"product_status:fixed": "5",
"product_status:known_affected": "5",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "net/xen-netback: prevent UAF in xenvif_flush_hash()",
"url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-49936.json",
"version": "3"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/xen-netback/hash.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "3c4423b0c4b98213b3438e15061e1d08220e6982",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "a0465723b8581cad27164c9073fd780904cd22d4",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "efcff6ce7467f01f0753609f420333f3f2ceceda",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "143edf098b80669d05245b2f2367dd156a83a2c5",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "d408889d4b54f5501e4becc4dbbb9065143fbf4e",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "54d8639af5568fc41c0e274fc3ec9cf86c59fcbb",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "0fa5e94a1811d68fbffa0725efe6d4ca62c03d12",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/xen-netback/hash.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"lessThan": "4.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.290",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.227",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.168",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.113",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.55",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.10.*",
"status": "unaffected",
"version": "6.10.14",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.11.*",
"status": "unaffected",
"version": "6.11.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.12",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "EB525A44-6338-4857-AD90-EA2860D1AD1F",
"versionEndExcluding": "5.10.227",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4D51C05D-455B-4D8D-89E7-A58E140B864C",
"versionEndExcluding": "5.15.168",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "D01BD22E-ACD1-4618-9D01-6116570BE1EE",
"versionEndExcluding": "6.1.113",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E90B9576-56C4-47BC-AAB0-C5B2D438F5D0",
"versionEndExcluding": "6.6.55",
"versionStartIncluding": "6.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4C16BCE0-FFA0-4599-BE0A-1FD65101C021",
"versionEndExcluding": "6.10.14",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "54D9C704-D679-41A7-9C40-10A6B1E7FFE9",
"versionEndExcluding": "6.11.3",
"versionStartIncluding": "6.11",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/xen-netback: prevent UAF in xenvif_flush_hash()\n\nDuring the list_for_each_entry_rcu iteration call of xenvif_flush_hash,\nkfree_rcu does not exist inside the rcu read critical section, so if\nkfree_rcu is called when the rcu grace period ends during the iteration,\nUAF occurs when accessing head-\u003enext after the entry becomes free.\n\nTherefore, to solve this, you need to change it to list_for_each_entry_safe."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/xen-netback: evitar UAF en xenvif_flush_hash() Durante la llamada de iteraci\u00f3n list_for_each_entry_rcu de xenvif_flush_hash, kfree_rcu no existe dentro de la secci\u00f3n cr\u00edtica de lectura de rcu, por lo que si se llama a kfree_rcu cuando finaliza el per\u00edodo de gracia de rcu durante la iteraci\u00f3n, se produce UAF al acceder a head-\u0026gt;next despu\u00e9s de que la entrada se libera. Por lo tanto, para resolver esto, debe cambiarlo a list_for_each_entry_safe."
}
],
"id": "CVE-2024-49936",
"lastModified": "2026-08-04T11:20:59.487",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.0,
"impactScore": 6.0,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-49936",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-10-22T13:38:23.774447Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-10-21T18:15:15.413",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/0fa5e94a1811d68fbffa0725efe6d4ca62c03d12"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/143edf098b80669d05245b2f2367dd156a83a2c5"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3c4423b0c4b98213b3438e15061e1d08220e6982"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/54d8639af5568fc41c0e274fc3ec9cf86c59fcbb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/a0465723b8581cad27164c9073fd780904cd22d4"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/d408889d4b54f5501e4becc4dbbb9065143fbf4e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/efcff6ce7467f01f0753609f420333f3f2ceceda"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-416"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-11-07T04:20:14+00:00",
"cve": "CVE-2024-49936",
"id": "CVE-2024-49936",
"initial_release_date": "2024-10-21T00:00:00+00:00",
"product_status:known_not_affected": "199",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net/xen-netback: prevent UAF in xenvif_flush_hash()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-49936.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2025-11-03T22:23:20.627Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2024-49936",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-10-22T13:38:23.774447Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-10-22T13:38:26.869Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/xen-netback/hash.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "3c4423b0c4b98213b3438e15061e1d08220e6982",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "a0465723b8581cad27164c9073fd780904cd22d4",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "efcff6ce7467f01f0753609f420333f3f2ceceda",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "143edf098b80669d05245b2f2367dd156a83a2c5",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "d408889d4b54f5501e4becc4dbbb9065143fbf4e",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "54d8639af5568fc41c0e274fc3ec9cf86c59fcbb",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
},
{
"lessThan": "0fa5e94a1811d68fbffa0725efe6d4ca62c03d12",
"status": "affected",
"version": "40d8abdee806d496a60ee607a6d01b1cd7fabaf0",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/xen-netback/hash.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"lessThan": "4.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.290",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.227",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.168",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.113",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.55",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.10.*",
"status": "unaffected",
"version": "6.10.14",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.11.*",
"status": "unaffected",
"version": "6.11.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.12",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.290",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.227",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.168",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.113",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.55",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.10.14",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.11.3",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12",
"versionStartIncluding": "4.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/xen-netback: prevent UAF in xenvif_flush_hash()\n\nDuring the list_for_each_entry_rcu iteration call of xenvif_flush_hash,\nkfree_rcu does not exist inside the rcu read critical section, so if\nkfree_rcu is called when the rcu grace period ends during the iteration,\nUAF occurs when accessing head-\u003enext after the entry becomes free.\n\nTherefore, to solve this, you need to change it to list_for_each_entry_safe."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T20:42:17.479Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/3c4423b0c4b98213b3438e15061e1d08220e6982"
},
{
"url": "https://git.kernel.org/stable/c/a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c"
},
{
"url": "https://git.kernel.org/stable/c/a0465723b8581cad27164c9073fd780904cd22d4"
},
{
"url": "https://git.kernel.org/stable/c/efcff6ce7467f01f0753609f420333f3f2ceceda"
},
{
"url": "https://git.kernel.org/stable/c/143edf098b80669d05245b2f2367dd156a83a2c5"
},
{
"url": "https://git.kernel.org/stable/c/d408889d4b54f5501e4becc4dbbb9065143fbf4e"
},
{
"url": "https://git.kernel.org/stable/c/54d8639af5568fc41c0e274fc3ec9cf86c59fcbb"
},
{
"url": "https://git.kernel.org/stable/c/0fa5e94a1811d68fbffa0725efe6d4ca62c03d12"
}
],
"title": "net/xen-netback: prevent UAF in xenvif_flush_hash()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-49936",
"datePublished": "2024-10-21T18:01:57.066Z",
"dateReserved": "2024-10-21T12:17:06.042Z",
"dateUpdated": "2026-05-11T20:42:17.479Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
Loading timeline…
Loading…
Loading…
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.