CVE-2024-49996

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Source
https://cve.org/CVERecord?id=CVE-2024-49996
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49996.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-49996
Downstream
Related
Published
2024-10-21T18:02:37.046Z
Modified
2026-03-20T12:39:30.477913Z
Summary
cifs: Fix buffer overflow when parsing NFS reparse points
Details

In the Linux kernel, the following vulnerability has been resolved:

cifs: Fix buffer overflow when parsing NFS reparse points

ReparseDataLength is sum of the InodeType size and DataBuffer size. So to get DataBuffer size it is needed to subtract InodeType's size from ReparseDataLength.

Function cifsstrndupfrom_utf16() is currentlly accessing buf->DataBuffer at position after the end of the buffer because it does not subtract InodeType size from the length. Fix this problem and correctly subtract variable len.

Member InodeType is present only when reparse buffer is large enough. Check for ReparseDataLength before accessing InodeType to prevent another invalid memory access.

Major and minor rdev values are present also only when reparse buffer is large enough. Check for reparse buffer size before calling reparse_mkdev().

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49996.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
d5ecebc4900df7f6e8dff0717574668885110553
Fixed
7b222d6cb87077faf56a687a72af1951cf78c8a9
Fixed
73b078e3314d4854fd8286f3ba65c860ddd3a3dd
Fixed
01cdddde39b065074fd48f07027757783cbf5b7d
Fixed
ec79e6170bcae8a6036a4b6960f5e7e59a785601
Fixed
c6db81c550cea0c73bd72ef55f579991e0e4ba07
Fixed
803b3a39cb096d8718c0aebc03fd19f11c7dc919
Fixed
c173d47b69f07cd7ca08efb4e458adbd4725d8e9
Fixed
e2a8910af01653c1c268984855629d71fb81f404

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49996.json"