Critical severity · published Aug 10, 2026
CVE-2026-68144
phonet: pep: fix use-after-free in pep_get_sb()
9.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
9641458d3ec42def729fde64669abf07f3220cd5 before c4a52cb4da8d57d060b1d52085d25147a238dac2; 9641458d3ec42def729fde64669abf07f3220cd5 before df198743859fefba2f824115f8151dd62d7ad6d8; 9641458d3ec42def729fde64669abf07f3220cd5 before 1d81e19fc57a5ee55b4497d01bc0510d76fb9578; 9641458d3ec42def729fde64669abf07f3220cd5 before 8d931a75a38b9bb584a4071f5ebbd52755fc35ee; 9641458d3ec42def729fde64669abf07f3220cd5 before 17f78c0c0d41d738ee236eb6e841e39395188054; 9641458d3ec42def729fde64669abf07f3220cd5 before a48a889b60f73edb0399a8b08284a2ab0bd0295f; +3 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-68144
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-68144
git.kernel.org
https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d
git.kernel.org
https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054
git.kernel.org
https://git.kernel.org/stable/c/1d81e19fc57a5ee55b4497d01bc0510d76fb9578
git.kernel.org
https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2
git.kernel.org
https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee
git.kernel.org
https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f
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