Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: batman-adv: frag: disallow unicast fragment in fragment batadv_frag_skb_buffer() is called by batadv_batman_skb_recv() when a BATADV_UNICAST_FRAG packet is received. Once all fragments are collected and the packet is reassembled, batadv_recv_frag_packet() calls batadv_batman_skb_recv() again to process the defragmented payload. A malicious sender can craft a BATADV_UNICAST_FRAG packet whose reassembled payload is itself a BATADV_UNICAST_FRAG packet (matryoshka-style nesting). Each nesting level recurses through batadv_batman_skb_recv() without bound, growing the kernel stack until it is exhausted. Since refragmentation or fragments in fragments are not actually allowed, discard all packets which are still BATADV_UNICAST_FRAG packets after the defragmentation process.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 before 0c208fa3859e3a33a1c38bebc41d021166e94ac8; affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 before bcda4814dc6524283c0b958882cb963d75fe411d; affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 before aea54d0bbe156d5ab7d00d68f66149ff41f4612a; affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 before b54e459cf86943583c1aa2ee3081874e7ab1f5f3; affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 before 5418be6c2e117bf8a316582795a8e3ff90f45e5d; affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 before 5895ad21c7059a652da83fb817510f7a1e962abf; affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 before 7138c35c9ad39a2fca6264af6b87466471f04ffc; affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 before bc62216dc8e221e3781afa14430f45208bfa9af9 |
| Linux / Linux | affected 3.13; unaffected 0 before 3.13; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.142 through 6.6.*; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0c208fa3859e3a33a1c38bebc41d021166e94ac8
- https://git.kernel.org/stable/c/bcda4814dc6524283c0b958882cb963d75fe411d
- https://git.kernel.org/stable/c/aea54d0bbe156d5ab7d00d68f66149ff41f4612a
- https://git.kernel.org/stable/c/b54e459cf86943583c1aa2ee3081874e7ab1f5f3
- https://git.kernel.org/stable/c/5418be6c2e117bf8a316582795a8e3ff90f45e5d
- https://git.kernel.org/stable/c/5895ad21c7059a652da83fb817510f7a1e962abf
- https://git.kernel.org/stable/c/7138c35c9ad39a2fca6264af6b87466471f04ffc
- https://git.kernel.org/stable/c/bc62216dc8e221e3781afa14430f45208bfa9af9