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CVE-2026-68144

phonet: pep: fix use-after-free in pep_get_sb()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 9641458d3ec42def729fde64669abf07f3220cd5 · fixed in c4a52cb4da8d57d060b1d52085d25147a238dac2; From 9641458d3ec42def729fde64669abf07f3220cd5 · fixed in df198743859fefba2f824115f8151dd62d7ad6d8; From 9641458d3ec42def729fde64669abf07f3220cd5 · fixed in 1d81e19fc57a5ee55b4497d01bc0510d76fb9578; From 9641458d3ec42def729fde64669abf07f3220cd5 · fixed in 8d931a75a38b9bb584a4071f5ebbd52755fc35ee; From 9641458d3ec42def729fde64669abf07f3220cd5 · fixed in 17f78c0c0d41d738ee236eb6e841e39395188054; From 9641458d3ec42def729fde64669abf07f3220cd5 · fixed in a48a889b60f73edb0399a8b08284a2ab0bd0295f; From 9641458d3ec42def729fde64669abf07f3220cd5 · fixed in 25e3641beb51333bfbb155af2fd2573a61113af2; From 9641458d3ec42def729fde64669abf07f3220cd5 · fixed in 0f71f852a96af9685858ce59fda34ecbf85c283d

  • Linux Linux

    2.6.28

  • KernelLinux

    From 2.6.28 · fixed in 5.10.265; From 5.11.0 · fixed in 5.15.216; From 5.16.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.148; From 6.7.0 · fixed in 6.12.101; From 6.13.0 · fixed in 6.18.42; From 6.19.0 · fixed in 7.1.6

References 8

git.kernel.org