GHSA-362P-G3RP-MXCH
Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-19 18:32In 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.
{
"affected": [],
"aliases": [
"CVE-2026-68144"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-10T13:20:00Z",
"severity": "CRITICAL"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nphonet: pep: fix use-after-free in pep_get_sb()\n\npep_get_sb() doesn\u0027t consider that pskb_may_pull() might have relocated\nthe skb data, and continue to access the older pointer, causing UAF.\n\nReproduced under KASAN:\n\n BUG: KASAN: slab-use-after-free in pep_get_sb+0x234/0x3b0\n Read of size 1 at addr ff11000105510f50 by task repro/157\n pep_get_sb+0x234/0x3b0\n pipe_handler_do_rcv+0x5f7/0xa10\n pep_do_rcv+0x203/0x410\n __sk_receive_skb+0x471/0x4a0\n phonet_rcv+0x5b3/0x6c0\n __netif_receive_skb+0xcc/0x1d0\n\nRefetch the header with skb_header_pointer() after pskb_may_pull(), so\nthe possibly stale pointer is no longer dereferenced. There are better\nways to solve this, but, this is the less instrusive one.",
"id": "GHSA-362p-g3rp-mxch",
"modified": "2026-08-19T18:32:07Z",
"published": "2026-08-10T15:33:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68144"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1d81e19fc57a5ee55b4497d01bc0510d76fb9578"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c4a52cb4da8d57d060b1d52085d25147a238dac2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/df198743859fefba2f824115f8151dd62d7ad6d8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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