381 lines
20 KiB
JSON
381 lines
20 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-53175",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-06-09T07:44:35.389Z",
|
|
"datePublished": "2026-06-25T08:38:52.034Z",
|
|
"dateUpdated": "2026-09-01T12:04:57.559Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T12:33:44.673Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ninet: frags: fix use-after-free caused by the fqdir_pre_exit() flush\n\nOn netns teardown, fqdir_pre_exit() walks the fqdir rhashtable and\nflushes every fragment queue that is not yet complete using\ninet_frag_queue_flush(). That helper frees all the skbs queued on the\nfragment queue but does not set INET_FRAG_COMPLETE, and leaves\nq->fragments_tail and q->last_run_head pointing at the freed skbs.\nThe queue itself stays in the rhashtable.\n\nfqdir_pre_exit() first lowers high_thresh to 0 to stop new queue lookups,\nbut it cannot stop a fragment that already obtained the queue through\ninet_frag_find() earlier and stalled just before taking the queue lock.\nOnce that fragment resumes after the flush and takes the queue lock,\nit passes the INET_FRAG_COMPLETE check and then dereferences the freed\nfragments_tail. inet_frag_queue_insert() reads FRAG_CB() and ->len of\nthat pointer and, on the append path, writes ->next_frag, causing a\nslab use-after-free. IPv6, nf_conntrack_reasm6 and 6lowpan reassembly\nshare the same flush path and are affected as well.\n\nReset rb_fragments, fragments_tail and last_run_head in\ninet_frag_queue_flush() so a flushed queue no longer points at the\nfreed skbs. A fragment that resumes after the flush and takes the\nqueue lock then finds an empty queue and starts a new run instead of\ndereferencing the freed fragments_tail. ip_frag_reinit() already\nperformed this reset after its own flush, so drop the now duplicate\ncode there."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
|
|
"baseScore": 9.8,
|
|
"baseSeverity": "CRITICAL"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:N - IPv4 and IPv6 fragment reassembly is reached by received network packets before transport-layer delivery, and the affected generic inet fragment code is shared by network-facing reassembly paths. A remote peer can supply the crafted fragmented traffic that reaches `inet_frag_queue_insert()`.\nAC:L - The vulnerable window is a race between a fragment that already found the queue and netns teardown flushing that queue. The race can be retried and, in attacker-controlled namespace/container scenarios, both fragmented traffic and namespace teardown/churn are attacker-controlled.\nPR:N - No authentication or capability check gates normal IPv4/IPv6 fragment receive and reassembly before the vulnerable queue insertion path. The packet-processing side is reachable pre-authentication by crafted fragmented traffic.\nUI:N - Exploitation does not require a victim user to open a file, mount anything, or perform another interactive action. Packet delivery and namespace teardown are kernel/system events.\nS:U - The corruption occurs inside the kernel network stack and impacts the same kernel security authority. This is not a guest-to-host, IOMMU, or other explicit security-scope crossing.\nC:H - The bug is a slab use-after-free involving freed `sk_buff` objects and stale queue pointers. Such memory corruption can be shaped into kernel memory disclosure primitives.\nI:H - The append path can write through the stale freed `fragments_tail` object via `next_frag`, producing kernel heap memory corruption. A UAF write primitive is sufficient to support control-flow hijack or arbitrary kernel data modification.\nA:H - Even without full exploitation, dereferencing and writing through freed skb memory can crash or oops the kernel. The fragment path can be triggered repeatedly with crafted traffic."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"net/ipv4/inet_fragment.c",
|
|
"net/ipv4/ip_fragment.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "22ee4010866da81aeee08e1ea3fddbe418feb212",
|
|
"lessThan": "0e823ca0e7391630784ae7dd0981b7ad170a93d9",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "543555954b1ee8d1903a7020324efb41b0c97428",
|
|
"lessThan": "c22599cc90e1cd5f8129c8670bd68a02ff7177b4",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "c70df25214ac9b32b53e18e6ae3b8f073ffa6903",
|
|
"lessThan": "89b909e9704587bfecc1aab1d37e98faee03b9f9",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "006a5035b495dec008805df249f92c22c89c3d2e",
|
|
"lessThan": "010c3313a4d178dc2d3ce958d2e5cb055e2864c1",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "006a5035b495dec008805df249f92c22c89c3d2e",
|
|
"lessThan": "32594b09854970d7ba83eb2dc8c69a2edd158c8e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "6.12.93",
|
|
"lessThan": "6.12.94",
|
|
"status": "affected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.3",
|
|
"lessThan": "6.18.36",
|
|
"status": "affected",
|
|
"versionType": "semver"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"net/ipv4/inet_fragment.c",
|
|
"net/ipv4/ip_fragment.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "6.19",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "6.19",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.94",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.36",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.0.13",
|
|
"lessThanOrEqual": "7.0.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.1",
|
|
"lessThanOrEqual": "*",
|
|
"status": "unaffected",
|
|
"versionType": "original_commit_for_fix"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"cpeApplicability": [
|
|
{
|
|
"nodes": [
|
|
{
|
|
"operator": "OR",
|
|
"negate": false,
|
|
"cpeMatch": [
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.12.93",
|
|
"versionEndExcluding": "6.12.94"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.18.3",
|
|
"versionEndExcluding": "6.18.36"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.19",
|
|
"versionEndExcluding": "7.0.13"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.19",
|
|
"versionEndExcluding": "7.1"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/0e823ca0e7391630784ae7dd0981b7ad170a93d9"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c22599cc90e1cd5f8129c8670bd68a02ff7177b4"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/89b909e9704587bfecc1aab1d37e98faee03b9f9"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/010c3313a4d178dc2d3ce958d2e5cb055e2864c1"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/32594b09854970d7ba83eb2dc8c69a2edd158c8e"
|
|
}
|
|
],
|
|
"title": "inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"affected": [
|
|
{
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"cpes": [
|
|
"cpe:/o:redhat:enterprise_linux:10"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"packageName": "kernel",
|
|
"product": "Red Hat Enterprise Linux 10",
|
|
"vendor": "Red Hat"
|
|
},
|
|
{
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"cpes": [
|
|
"cpe:/o:redhat:enterprise_linux:6"
|
|
],
|
|
"defaultStatus": "unknown",
|
|
"packageName": "kernel",
|
|
"product": "Red Hat Enterprise Linux 6",
|
|
"vendor": "Red Hat"
|
|
},
|
|
{
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"cpes": [
|
|
"cpe:/o:redhat:enterprise_linux:7"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"packageName": "kernel",
|
|
"product": "Red Hat Enterprise Linux 7",
|
|
"vendor": "Red Hat"
|
|
},
|
|
{
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"cpes": [
|
|
"cpe:/o:redhat:enterprise_linux:7"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"packageName": "kernel-rt",
|
|
"product": "Red Hat Enterprise Linux 7",
|
|
"vendor": "Red Hat"
|
|
},
|
|
{
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"cpes": [
|
|
"cpe:/o:redhat:enterprise_linux:8"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"packageName": "kernel",
|
|
"product": "Red Hat Enterprise Linux 8",
|
|
"vendor": "Red Hat"
|
|
},
|
|
{
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"cpes": [
|
|
"cpe:/o:redhat:enterprise_linux:8"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"packageName": "kernel-rt",
|
|
"product": "Red Hat Enterprise Linux 8",
|
|
"vendor": "Red Hat"
|
|
},
|
|
{
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"cpes": [
|
|
"cpe:/o:redhat:enterprise_linux:9"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"packageName": "kernel",
|
|
"product": "Red Hat Enterprise Linux 9",
|
|
"vendor": "Red Hat"
|
|
},
|
|
{
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"cpes": [
|
|
"cpe:/o:redhat:enterprise_linux:9"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"packageName": "kernel-rt",
|
|
"product": "Red Hat Enterprise Linux 9",
|
|
"vendor": "Red Hat"
|
|
}
|
|
],
|
|
"datePublic": "2026-06-25T00:00:00.000Z",
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "A flaw was found in the Linux kernel's internet fragmentation code. This vulnerability, a use-after-free, occurs due to a timing issue during the shutdown of network namespaces. A local attacker could exploit this by manipulating network namespace operations, potentially leading to memory corruption. This could result in a system crash, causing a denial of service, or in some cases, allow for an increase in their access privileges."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"content": {
|
|
"namespace": "https://access.redhat.com/security/updates/classification/",
|
|
"value": "Important"
|
|
},
|
|
"type": "Red Hat severity rating"
|
|
}
|
|
},
|
|
{
|
|
"cvssV3_1": {
|
|
"attackComplexity": "HIGH",
|
|
"attackVector": "LOCAL",
|
|
"availabilityImpact": "HIGH",
|
|
"baseScore": 7,
|
|
"baseSeverity": "HIGH",
|
|
"confidentialityImpact": "HIGH",
|
|
"integrityImpact": "HIGH",
|
|
"privilegesRequired": "LOW",
|
|
"scope": "UNCHANGED",
|
|
"userInteraction": "NONE",
|
|
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
|
|
"version": "3.1"
|
|
},
|
|
"format": "CVSS"
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"cweId": "CWE-825",
|
|
"description": "Expired Pointer Dereference",
|
|
"lang": "en",
|
|
"type": "CWE"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"tags": [
|
|
"vdb-entry",
|
|
"x_refsource_REDHAT"
|
|
],
|
|
"url": "https://access.redhat.com/security/cve/CVE-2026-53175"
|
|
},
|
|
{
|
|
"name": "RHBZ#2492840",
|
|
"tags": [
|
|
"issue-tracking",
|
|
"x_refsource_REDHAT"
|
|
],
|
|
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492840"
|
|
},
|
|
{
|
|
"tags": [
|
|
"x_sadp-csaf-vex"
|
|
],
|
|
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53175.json"
|
|
}
|
|
],
|
|
"timeline": [
|
|
{
|
|
"lang": "en",
|
|
"time": "2026-06-25T00:00:00.000Z",
|
|
"value": "Reported to Red Hat."
|
|
},
|
|
{
|
|
"lang": "en",
|
|
"time": "2026-06-25T00:00:00.000Z",
|
|
"value": "Made public."
|
|
}
|
|
],
|
|
"title": "kernel: Linux kernel: Memory corruption via use-after-free in internet fragmentation",
|
|
"x_adpType": "supplier",
|
|
"x_generator": {
|
|
"engine": "sadp-cli 1.0.0"
|
|
},
|
|
"providerMetadata": {
|
|
"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
|
|
"shortName": "redhat-SADP",
|
|
"dateUpdated": "2026-09-01T12:04:57.559Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |