CVE-2026-68450 (GCVE-0-2026-68450)
Vulnerability from cvelistv5
Published
2026-08-12 00:51
Modified
2026-08-19 16:35
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
btrfs: free mapping node on duplicate reloc root insert
__add_reloc_root() allocates a mapping_node before inserting it into
rc->reloc_root_tree. If rb_simple_insert() finds an existing entry, it
returns the existing rb_node and leaves the newly allocated node unlinked.
The error path then returns -EEXIST without freeing the new node. Since
the node was never inserted into reloc_root_tree, the later cleanup in
put_reloc_control() cannot find it either.
Free the newly allocated node before returning -EEXIST.
The callers currently assert that -EEXIST should not happen, so this is a
defensive cleanup for an unexpected duplicate insert path. If the path is
ever reached, the local allocation should still be released.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 Version: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 Version: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 Version: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 Version: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 Version: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 Version: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/btrfs/relocation.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "29d9746812d8b7c37d594f484e994fd552c3ec33",
"status": "affected",
"version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
"versionType": "git"
},
{
"lessThan": "b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8",
"status": "affected",
"version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
"versionType": "git"
},
{
"lessThan": "92bedc0455552b42ada1a1f42b0e3a8593cdfccc",
"status": "affected",
"version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
"versionType": "git"
},
{
"lessThan": "14a8be9428435ee17f17fae7991215c246b7fd43",
"status": "affected",
"version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
"versionType": "git"
},
{
"lessThan": "797dc567146c7e3c4f8d9680e4fbc76e0a6d9151",
"status": "affected",
"version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
"versionType": "git"
},
{
"lessThan": "ae0629ff9ccb836416ada129f4edc7efea6eaaad",
"status": "affected",
"version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
"versionType": "git"
},
{
"lessThan": "6a8269b6459ed870a8156c106a0f597383907872",
"status": "affected",
"version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/btrfs/relocation.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.13"
},
{
"lessThan": "5.13",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.216",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.148",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
"versionStartIncluding": "5.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.13",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: free mapping node on duplicate reloc root insert\n\n__add_reloc_root() allocates a mapping_node before inserting it into\nrc-\u003ereloc_root_tree. If rb_simple_insert() finds an existing entry, it\nreturns the existing rb_node and leaves the newly allocated node unlinked.\n\nThe error path then returns -EEXIST without freeing the new node. Since\nthe node was never inserted into reloc_root_tree, the later cleanup in\nput_reloc_control() cannot find it either.\n\nFree the newly allocated node before returning -EEXIST.\n\nThe callers currently assert that -EEXIST should not happen, so this is a\ndefensive cleanup for an unexpected duplicate insert path. If the path is\never reached, the local allocation should still be released."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:35:45.490Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/29d9746812d8b7c37d594f484e994fd552c3ec33"
},
{
"url": "https://git.kernel.org/stable/c/b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8"
},
{
"url": "https://git.kernel.org/stable/c/92bedc0455552b42ada1a1f42b0e3a8593cdfccc"
},
{
"url": "https://git.kernel.org/stable/c/14a8be9428435ee17f17fae7991215c246b7fd43"
},
{
"url": "https://git.kernel.org/stable/c/797dc567146c7e3c4f8d9680e4fbc76e0a6d9151"
},
{
"url": "https://git.kernel.org/stable/c/ae0629ff9ccb836416ada129f4edc7efea6eaaad"
},
{
"url": "https://git.kernel.org/stable/c/6a8269b6459ed870a8156c106a0f597383907872"
}
],
"title": "btrfs: free mapping node on duplicate reloc root insert",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68450",
"datePublished": "2026-08-12T00:51:48.970Z",
"dateReserved": "2026-07-30T09:28:09.395Z",
"dateUpdated": "2026-08-19T16:35:45.490Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…