Description · from the CVE record
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: reject oversized global TT response buffers
batadv_tt_prepare_tvlv_global_data() builds the allocation length for a
global TT response in 16-bit temporaries. When a remote originator
advertises a large enough global TT, the TT payload length plus the VLAN
header offset can exceed 65535 and wrap before kmalloc().
The full-table response path still uses the original TT payload length when
it fills tt_change, so the wrapped allocation is too small and
batadv_tt_prepare_tvlv_global_data() writes past the end of the heap object
before the later packet-size check runs.
Fix this by rejecting TT responses whose TVLV value length cannot fit in
the 16-bit TVLV payload length field.
Affected
ProductAffectedFixed inSource
Linux7ea7b4a142758deaf46c1af0ca9ceca6dd55138b – < 7e5d007e0df946bffb8542fb112e0044014a58977e5d007e0df946bffb8542fb112e0044014a5897CNA
Linux7ea7b4a142758deaf46c1af0ca9ceca6dd55138b – < 2997f4bd1f982e7013709946e00be89b507693fa2997f4bd1f982e7013709946e00be89b507693faCNA
Linux7ea7b4a142758deaf46c1af0ca9ceca6dd55138b – < 95c71365a2222908441b54d6f2c315e0c79fcec395c71365a2222908441b54d6f2c315e0c79fcec3CNA
Linux7ea7b4a142758deaf46c1af0ca9ceca6dd55138b – < 69d61639bc7e963c3b645e570279d731e7c8906269d61639bc7e963c3b645e570279d731e7c89062CNA
Linux7ea7b4a142758deaf46c1af0ca9ceca6dd55138b – < f970646b9a39539d1bac86822ac78b5915455ea9f970646b9a39539d1bac86822ac78b5915455ea9CNA
Linux7ea7b4a142758deaf46c1af0ca9ceca6dd55138b – < de6c1dc3c7d01a152607e6fcecee4d5288283f10de6c1dc3c7d01a152607e6fcecee4d5288283f10CNA
Linux7ea7b4a142758deaf46c1af0ca9ceca6dd55138b – < cf2199171ef799ca7270019125f4a91bd20ad4d9cf2199171ef799ca7270019125f4a91bd20ad4d9CNA
Linux7ea7b4a142758deaf46c1af0ca9ceca6dd55138b – < 3a359bf5c61d52e7f09754108309d637532164a63a359bf5c61d52e7f09754108309d637532164a6CNA
Linux3.13–CNA
by Kastro