CVE-2026-68144
Description
In the Linux kernel, the following vulnerability has been resolved: phonet: pep: fix use-after-free in pep_get_sb() pep_get_sb() doesn't consider that pskb_may_pull() might have relocated the skb data, and continue to access the older pointer, causing UAF. Reproduced under KASAN: BUG: KASAN: slab-use-after-free in pep_get_sb+0x234/0x3b0 Read of size 1 at addr ff11000105510f50 by task repro/157 pep_get_sb+0x234/0x3b0 pipe_handler_do_rcv+0x5f7/0xa10 pep_do_rcv+0x203/0x410 __sk_receive_skb+0x471/0x4a0 phonet_rcv+0x5b3/0x6c0 __netif_receive_skb+0xcc/0x1d0 Refetch the header with skb_header_pointer() after pskb_may_pull(), so the possibly stale pointer is no longer dereferenced. There are better ways to solve this, but, this is the less instrusive one.
How to fix
- Linux Linuxc4a52cb4da8d57d060b1d52085d25147a238dac2, df198743859fefba2f824115f8151dd62d7ad6d8, 1d81e19fc57a5ee55b4497d01bc0510d76fb9578, 8d931a75a38b9bb584a4071f5ebbd52755fc35ee, 17f78c0c0d41d738ee236eb6e841e39395188054, a48a889b60f73edb0399a8b08284a2ab0bd0295f, 25e3641beb51333bfbb155af2fd2573a61113af2, 0f71f852a96af9685858ce59fda34ecbf85c283d or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 9641458d3ec42def729fde64669abf07f3220cd5 ≤ v < c4a52cb4da8d57d060b1d52085d25147a238dac2, 9641458d3ec42def729fde64669abf07f3220cd5 ≤ v < df198743859fefba2f824115f8151dd62d7ad6d8, 9641458d3ec42def729fde64669abf07f3220cd5 ≤ v < 1d81e19fc57a5ee55b4497d01bc0510d76fb9578, 9641458d3ec42def729fde64669abf07f3220cd5 ≤ v < 8d931a75a38b9bb584a4071f5ebbd52755fc35ee, 9641458d3ec42def729fde64669abf07f3220cd5 ≤ v < 17f78c0c0d41d738ee236eb6e841e39395188054, 9641458d3ec42def729fde64669abf07f3220cd5 ≤ v < a48a889b60f73edb0399a8b08284a2ab0bd0295f, 9641458d3ec42def729fde64669abf07f3220cd5 ≤ v < 25e3641beb51333bfbb155af2fd2573a61113af2, 9641458d3ec42def729fde64669abf07f3220cd5 ≤ v < 0f71f852a96af9685858ce59fda34ecbf85c283d, 2.6.28 | c4a52cb4da8d57d060b1d52085d25147a238dac2, df198743859fefba2f824115f8151dd62d7ad6d8, 1d81e19fc57a5ee55b4497d01bc0510d76fb9578, 8d931a75a38b9bb584a4071f5ebbd52755fc35ee, 17f78c0c0d41d738ee236eb6e841e39395188054, a48a889b60f73edb0399a8b08284a2ab0bd0295f, 25e3641beb51333bfbb155af2fd2573a61113af2, 0f71f852a96af9685858ce59fda34ecbf85c283d |
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