CVE-2026-80851
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: gtp: serialize PDP context updates PDP contexts can be deleted through GTP_CMD_DELPDP or while the GTP network device is being unregistered. The latter is serialized by RTNL, but the generic-netlink delete path only holds RCU. Running both paths concurrently can therefore make both paths delete the same PDP context. The issue was found through static analysis and reproduced on a KASAN-enabled kernel by a simple two-thread program racing GTP_CMD_DELPDP against RTM_DELLINK: Oops: general protection fault, probably for non-canonical address KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127] RIP: gtp_genl_del_pdp+0x1c1/0x420 [gtp] RBP: dead000000000122 The second deletion dereferenced the poisoned hlist pprev pointer. Serialize gtp_pdp_add(), gtp_genl_del_pdp(), and gtp_dellink() with a shared mutex. Keep the mutex held until the final use of a PDP context in the NEWPDP path, and keep the RCU read-side section around the complete PDP context use in the DELPDP path.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-04 16:18:13.950000
Last modified
2026-10-30 13:20:12.387000
View original CVE JSON
{
"id": "CVE-2026-80851",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-04T16:18:13.950",
"lastModified": "2026-10-30T13:20:12.387",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: serialize PDP context updates\n\nPDP contexts can be deleted through GTP_CMD_DELPDP or while the GTP\nnetwork device is being unregistered. The latter is serialized by RTNL,\nbut the generic-netlink delete path only holds RCU.\n\nRunning both paths concurrently can therefore make both paths delete the\nsame PDP context. The issue was found through static analysis and\nreproduced on a KASAN-enabled kernel by a simple two-thread program\nracing GTP_CMD_DELPDP against RTM_DELLINK:\n\n Oops: general protection fault, probably for non-canonical address\n KASAN: maybe wild-memory-access in range\n [0xdead000000000120-0xdead000000000127]\n RIP: gtp_genl_del_pdp+0x1c1/0x420 [gtp]\n RBP: dead000000000122\n\nThe second deletion dereferenced the poisoned hlist pprev pointer.\n\nSerialize gtp_pdp_add(), gtp_genl_del_pdp(), and gtp_dellink() with a\nshared mutex. Keep the mutex held until the final use of a PDP context in\nthe NEWPDP path, and keep the RCU read-side section around the complete\nPDP context use in the DELPDP path."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/net/gtp.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
"lessThan": "d8ebf8875fb97b3e39aa226af78f9c619e96ee31",
"versionType": "git",
"status": "affected"
},
{
"version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
"lessThan": "6e5472c1c1619793cbadb02bccf7d2d9f826052f",
"versionType": "git",
"status": "affected"
},
{
"version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
"lessThan": "d9a83492ffc99f228d91873473e3820300525f00",
"versionType": "git",
"status": "affected"
},
{
"version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
"lessThan": "b4ac2a5ce5a96ec21ed48f60d30b52b1fb22c62a",
"versionType": "git",
"status": "affected"
},
{
"version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
"lessThan": "5f77ddb2756340c1b05381674ca025d52998005e",
"versionType": "git",
"status": "affected"
},
{
"version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
"lessThan": "3d950e98f74af9611925a5226edced02155f6ed1",
"versionType": "git",
"status": "affected"
},
{
"version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
"lessThan": "6df4f05bc2991467939d7d80b6f7e121559cc3df",
"versionType": "git",
"status": "affected"
},
{
"version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
"lessThan": "1e995498d29784a06a2b2899370a1926cfc8410d",
"versionType": "git",
"status": "affected"
},
{
"version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
"lessThan": "498386b6d402737db1e2eeed4c385acbf0ef9e34",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/net/gtp.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.7",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.7",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.273",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.224",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.158",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.108",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.49",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.13",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.3",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/1e995498d29784a06a2b2899370a1926cfc8410d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3d950e98f74af9611925a5226edced02155f6ed1",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/498386b6d402737db1e2eeed4c385acbf0ef9e34",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5f77ddb2756340c1b05381674ca025d52998005e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6df4f05bc2991467939d7d80b6f7e121559cc3df",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6e5472c1c1619793cbadb02bccf7d2d9f826052f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b4ac2a5ce5a96ec21ed48f60d30b52b1fb22c62a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d8ebf8875fb97b3e39aa226af78f9c619e96ee31",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d9a83492ffc99f228d91873473e3820300525f00",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}