CVE-2026-68144

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 v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-10 13:20

Updated : 2026-08-19 17:20

NVD link : CVE-2026-68144

Mitre link : CVE-2026-68144

CVE.ORG link : CVE-2026-68144

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-68144", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "9641458d3ec42def729fde64669abf07f3220cd5", "lessThan": "c4a52cb4da8d57d060b1d52085d25147a238dac2", "versionType": "git"}, {"status": "affected", "version": "9641458d3ec42def729fde64669abf07f3220cd5", "lessThan": "df198743859fefba2f824115f8151dd62d7ad6d8", "versionType": "git"}, {"status": "affected", "version": "9641458d3ec42def729fde64669abf07f3220cd5", "lessThan": "1d81e19fc57a5ee55b4497d01bc0510d76fb9578", "versionType": "git"}, {"status": "affected", "version": "9641458d3ec42def729fde64669abf07f3220cd5", "lessThan": "8d931a75a38b9bb584a4071f5ebbd52755fc35ee", "versionType": "git"}, {"status": "affected", "version": "9641458d3ec42def729fde64669abf07f3220cd5", "lessThan": "17f78c0c0d41d738ee236eb6e841e39395188054", "versionType": "git"}, {"status": "affected", "version": "9641458d3ec42def729fde64669abf07f3220cd5", "lessThan": "a48a889b60f73edb0399a8b08284a2ab0bd0295f", "versionType": "git"}, {"status": "affected", "version": "9641458d3ec42def729fde64669abf07f3220cd5", "lessThan": "25e3641beb51333bfbb155af2fd2573a61113af2", "versionType": "git"}, {"status": "affected", "version": "9641458d3ec42def729fde64669abf07f3220cd5", "lessThan": "0f71f852a96af9685858ce59fda34ecbf85c283d", "versionType": "git"}], "programFiles": ["net/phonet/pep.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.28"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.28", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.265", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.216", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.183", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.148", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.101", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.42", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.6", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/phonet/pep.c"], "defaultStatus": "affected"}]}], "published": "2026-08-10T13:20:00.217", "references": [{"url": "https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1d81e19fc57a5ee55b4497d01bc0510d76fb9578", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c4a52cb4da8d57d060b1d52085d25147a238dac2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/df198743859fefba2f824115f8151dd62d7ad6d8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "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't 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."}], "lastModified": "2026-08-19T17:20:31.653", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}