CVE-2023-54062 (GCVE-0-2023-54062)
Vulnerability from cvelistv5
Published
2025-12-24 12:23
Modified
2026-10-15 21:41
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix invalid free tracking in ext4_xattr_move_to_block()
In ext4_xattr_move_to_block(), the value of the extended attribute
which we need to move to an external block may be allocated by
kvmalloc() if the value is stored in an external inode. So at the end
of the function the code tried to check if this was the case by
testing entry->e_value_inum.
However, at this point, the pointer to the xattr entry is no longer
valid, because it was removed from the original location where it had
been stored. So we could end up calling kvfree() on a pointer which
was not allocated by kvmalloc(); or we could also potentially leak
memory by not freeing the buffer when it should be freed. Fix this by
storing whether it should be freed in a separate variable.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: c7851208abffe5ae4deb01cf48763911dc14fc67 Version: f5cdc6a7339f250d44d4d469ed7a474ac0d6c7a7 Version: 3b28c799a1334adb5a19f42f03abe0d8cbb05938 Version: d738789ae9ec47d3458a008788f3cdc862ebf0cb Version: a6744e14ce7045ab1a728bde9595f62fbd39f1d2 Version: 8b6d06b3be7648b3b0f428558293ddf6e2cb94bf Version: d2efaf8c870c7067b8d1779773134f3481cd8f68 Version: 1e9d62d252812575ded7c620d8fc67c32ff06c16 Version: 1e9d62d252812575ded7c620d8fc67c32ff06c16 Version: 4.14.308 ≤ Version: 4.19.276 ≤ Version: 5.4.235 ≤ Version: 5.10.173 ≤ Version: 5.15.99 ≤ Version: 6.1.16 ≤ Version: 6.2.3 ≤ |
||
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attribute\\nwhich we need to move to an external block may be allocated by\\nkvmalloc() if the value is stored in an external inode. So at the end\\nof the function the code tried to check if this was the case by\\ntesting entry-\u003ee_value_inum.\\n\\nHowever, at this point, the pointer to the xattr entry is no longer\\nvalid, because it was removed from the original location where it had\\nbeen stored. So we could end up calling kvfree() on a pointer which\\nwas not allocated by kvmalloc(); or we could also potentially leak\\nmemory by not freeing the buffer when it should be freed. Fix this by\\nstoring whether it should be freed in a separate variable.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.315\", \"versionStartIncluding\": \"4.14.308\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.283\", \"versionStartIncluding\": \"4.19.276\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.243\", \"versionStartIncluding\": \"5.4.235\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.180\", \"versionStartIncluding\": \"5.10.173\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.112\", \"versionStartIncluding\": \"5.15.99\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.29\", \"versionStartIncluding\": \"6.1.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2.16\", \"versionStartIncluding\": \"6.2.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.3.3\", \"versionStartIncluding\": \"6.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4\", \"versionStartIncluding\": \"6.3\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T09:16:50.491Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-54062\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-15T21:41:38.822Z\", \"dateReserved\": \"2025-12-24T12:21:05.092Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-12-24T12:23:08.649Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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.
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