Critical 9.8Published Aug 10, 2026

CVE-2026-68144phonet: pep: fix use-after-free in pep_get_sb()

Updated under an hour ago (Oct 27, 2026, 9:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 9641458d3ec42def729fde64669abf07f3220cd5 before c4a52cb4da8d57d060b1d52085d25147a238dac2; from 9641458d3ec42def729fde64669abf07f3220cd5 before df198743859fefba2f824115f8151dd62d7ad6d8; 9641458d3ec42def729fde64669abf07f3220cd5 builds before 1d81e19fc57a5ee55b4497d01bc0510d76fb9578; 9641458d3ec42def729fde64669abf07f3220cd5 builds before 8d931a75a38b9bb584a4071f5ebbd52755fc35ee; 9641458d3ec42def729fde64669abf07f3220cd5 builds before 17f78c0c0d41d738ee236eb6e841e39395188054; from 9641458d3ec42def729fde64669abf07f3220cd5 before a48a889b60f73edb0399a8b08284a2ab0bd0295f; 9641458d3ec42def729fde64669abf07f3220cd5 builds before 25e3641beb51333bfbb155af2fd2573a61113af2; 9641458d3ec42def729fde64669abf07f3220cd5 builds before 0f71f852a96af9685858ce59fda34ecbf85c283d	CNA record

References

References

https://git.kernel.org/stable/c/c4a52cb4da8d57d060b1d52085d25147a238dac2
https://git.kernel.org/stable/c/df198743859fefba2f824115f8151dd62d7ad6d8
https://git.kernel.org/stable/c/1d81e19fc57a5ee55b4497d01bc0510d76fb9578
https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee
https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054
https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f
https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2
https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.