{"api_version":"1","generated_at":"2026-09-10T22:44:51+00:00","cve":"CVE-2026-80851","urls":{"html":"https://cve.report/CVE-2026-80851","api":"https://cve.report/api/cve/CVE-2026-80851.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80851","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80851"},"summary":{"title":"gtp: serialize PDP context updates","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-04 16:18:13","updated_at":"2026-09-04 16:18:13"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6df4f05bc2991467939d7d80b6f7e121559cc3df","name":"https://git.kernel.org/stable/c/6df4f05bc2991467939d7d80b6f7e121559cc3df","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1e995498d29784a06a2b2899370a1926cfc8410d","name":"https://git.kernel.org/stable/c/1e995498d29784a06a2b2899370a1926cfc8410d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/498386b6d402737db1e2eeed4c385acbf0ef9e34","name":"https://git.kernel.org/stable/c/498386b6d402737db1e2eeed4c385acbf0ef9e34","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5f77ddb2756340c1b05381674ca025d52998005e","name":"https://git.kernel.org/stable/c/5f77ddb2756340c1b05381674ca025d52998005e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3d950e98f74af9611925a5226edced02155f6ed1","name":"https://git.kernel.org/stable/c/3d950e98f74af9611925a5226edced02155f6ed1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80851","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80851","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 459aa660eb1d8ce67080da1983bb81d716aa5a69 5f77ddb2756340c1b05381674ca025d52998005e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 459aa660eb1d8ce67080da1983bb81d716aa5a69 3d950e98f74af9611925a5226edced02155f6ed1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 459aa660eb1d8ce67080da1983bb81d716aa5a69 6df4f05bc2991467939d7d80b6f7e121559cc3df git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 459aa660eb1d8ce67080da1983bb81d716aa5a69 1e995498d29784a06a2b2899370a1926cfc8410d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 459aa660eb1d8ce67080da1983bb81d716aa5a69 498386b6d402737db1e2eeed4c385acbf0ef9e34 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.108 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.49 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.13 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.3 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80851","cve":"CVE-2026-80851","epss":"0.001680000","percentile":"0.063360000","score_date":"2026-09-07","updated_at":"2026-09-08 00:05:27"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/gtp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5f77ddb2756340c1b05381674ca025d52998005e","status":"affected","version":"459aa660eb1d8ce67080da1983bb81d716aa5a69","versionType":"git"},{"lessThan":"3d950e98f74af9611925a5226edced02155f6ed1","status":"affected","version":"459aa660eb1d8ce67080da1983bb81d716aa5a69","versionType":"git"},{"lessThan":"6df4f05bc2991467939d7d80b6f7e121559cc3df","status":"affected","version":"459aa660eb1d8ce67080da1983bb81d716aa5a69","versionType":"git"},{"lessThan":"1e995498d29784a06a2b2899370a1926cfc8410d","status":"affected","version":"459aa660eb1d8ce67080da1983bb81d716aa5a69","versionType":"git"},{"lessThan":"498386b6d402737db1e2eeed4c385acbf0ef9e34","status":"affected","version":"459aa660eb1d8ce67080da1983bb81d716aa5a69","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/gtp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.7"},{"lessThan":"4.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.108","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.49","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.13","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.108","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.49","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.13","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.3","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"4.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-09-04T15:55:01.667Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5f77ddb2756340c1b05381674ca025d52998005e"},{"url":"https://git.kernel.org/stable/c/3d950e98f74af9611925a5226edced02155f6ed1"},{"url":"https://git.kernel.org/stable/c/6df4f05bc2991467939d7d80b6f7e121559cc3df"},{"url":"https://git.kernel.org/stable/c/1e995498d29784a06a2b2899370a1926cfc8410d"},{"url":"https://git.kernel.org/stable/c/498386b6d402737db1e2eeed4c385acbf0ef9e34"}],"title":"gtp: serialize PDP context updates","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80851","datePublished":"2026-09-04T15:55:01.667Z","dateReserved":"2026-08-26T14:34:25.797Z","dateUpdated":"2026-09-04T15:55:01.667Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-04 16:18:13","lastModifiedDate":"2026-09-04 16:18:13","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80851","Ordinal":"1","Title":"gtp: serialize PDP context updates","CVE":"CVE-2026-80851","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80851","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"gtp: serialize PDP context updates"}]}}}