Description
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 cifs_strndup_from_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().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d5ecebc4900df7f6e8dff0717574668885110553 to < 7b222d6cb87077faf56a687a72af1951cf78c8a9affectedd5ecebc4900df7f6e8dff0717574668885110553 to < 73b078e3314d4854fd8286f3ba65c860ddd3a3ddaffectedd5ecebc4900df7f6e8dff0717574668885110553 to < 01cdddde39b065074fd48f07027757783cbf5b7daffectedd5ecebc4900df7f6e8dff0717574668885110553 to < ec79e6170bcae8a6036a4b6960f5e7e59a785601affectedd5ecebc4900df7f6e8dff0717574668885110553 to < c6db81c550cea0c73bd72ef55f579991e0e4ba07affectedd5ecebc4900df7f6e8dff0717574668885110553 to < 803b3a39cb096d8718c0aebc03fd19f11c7dc919affectedd5ecebc4900df7f6e8dff0717574668885110553 to < c173d47b69f07cd7ca08efb4e458adbd4725d8e9affectedd5ecebc4900df7f6e8dff0717574668885110553 to < e2a8910af01653c1c268984855629d71fb81f404affected
Linux Linux
Default version status: affected
5.3affected0 to < 5.3unaffected5.4.287 to ≤ 5.4.*unaffected5.10.231 to ≤ 5.10.*unaffected5.15.174 to ≤ 5.15.*unaffected6.1.120 to ≤ 6.1.*unaffected6.6.55 to ≤ 6.6.*unaffected6.10.14 to ≤ 6.10.*unaffected6.11.3 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/7b222d6cb87077faf56a687a72af1951cf78c8a9 ↗
- https://git.kernel.org/stable/c/73b078e3314d4854fd8286f3ba65c860ddd3a3dd ↗
- https://git.kernel.org/stable/c/01cdddde39b065074fd48f07027757783cbf5b7d ↗
- https://git.kernel.org/stable/c/ec79e6170bcae8a6036a4b6960f5e7e59a785601 ↗
- https://git.kernel.org/stable/c/c6db81c550cea0c73bd72ef55f579991e0e4ba07 ↗
- https://git.kernel.org/stable/c/803b3a39cb096d8718c0aebc03fd19f11c7dc919 ↗
- https://git.kernel.org/stable/c/c173d47b69f07cd7ca08efb4e458adbd4725d8e9 ↗
- https://git.kernel.org/stable/c/e2a8910af01653c1c268984855629d71fb81f404 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗