{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64577", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.798Z", "datePublished": "2026-08-05T08:09:33.135Z", "dateUpdated": "2026-08-05T08:09:33.135Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:09:33.135Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: check skb_pull_data() return in gtp1u_send_echo_resp()\n\ngtp1u_send_echo_resp() ignores skb_pull_data()'s return value. Its\ncaller gtp1u_udp_encap_recv() only guarantees 16 bytes (udphdr +\ngtp1_header), but the pull requests 20 (gtp1_header_long + udphdr). For\na 16-19 byte echo request the pull fails and returns NULL without\nadvancing skb->data; execution continues, and the following skb_push()\nplus the IP header pushed by iptunnel_xmit() move skb->data below\nskb->head, tripping skb_under_panic().\n\nFix it by dropping the packet when skb_pull_data() fails.\n\n skbuff: skb_under_panic: ...\n kernel BUG at net/core/skbuff.c:214!\n Call Trace:\n skb_push (net/core/skbuff.c:2648)\n iptunnel_xmit (net/ipv4/ip_tunnel_core.c:82)\n gtp_encap_recv (drivers/net/gtp.c:701 drivers/net/gtp.c:808 drivers/net/gtp.c:920)\n udp_queue_rcv_one_skb (net/ipv4/udp.c:2388)\n ...\n Kernel panic - not syncing: Fatal exception in interrupt"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/gtp.c"], "versions": [{"version": "9af41cc33471ea1efa6f77e188f055cc77d0a5c5", "lessThan": "b3c733eaae7f362601c28ac1533d47a961cd3e1c", "status": "affected", "versionType": "git"}, {"version": "9af41cc33471ea1efa6f77e188f055cc77d0a5c5", "lessThan": "4fc7923871d176ce0e5fecf4a9b7bb915af790ed", "status": "affected", "versionType": "git"}, {"version": "9af41cc33471ea1efa6f77e188f055cc77d0a5c5", "lessThan": "961e9b1e33445f8e42859ecc020c9f60d8b69a8b", "status": "affected", "versionType": "git"}, {"version": "9af41cc33471ea1efa6f77e188f055cc77d0a5c5", "lessThan": "cf45d748e437b8dd2dd987f27ee79c8c86f95c88", "status": "affected", "versionType": "git"}, {"version": "9af41cc33471ea1efa6f77e188f055cc77d0a5c5", "lessThan": "cd170f051dba9ac146fabcd1b91726487c0cb9fa", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/gtp.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.2-rc5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b3c733eaae7f362601c28ac1533d47a961cd3e1c"}, {"url": "https://git.kernel.org/stable/c/4fc7923871d176ce0e5fecf4a9b7bb915af790ed"}, {"url": "https://git.kernel.org/stable/c/961e9b1e33445f8e42859ecc020c9f60d8b69a8b"}, {"url": "https://git.kernel.org/stable/c/cf45d748e437b8dd2dd987f27ee79c8c86f95c88"}, {"url": "https://git.kernel.org/stable/c/cd170f051dba9ac146fabcd1b91726487c0cb9fa"}], "title": "gtp: check skb_pull_data() return in gtp1u_send_echo_resp()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9af41cc33471ea1efa6f77e188f055cc77d0a5c5,b3c733eaae7f362601c28ac1533d47a961cd3e1c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9af41cc33471ea1efa6f77e188f055cc77d0a5c5,4fc7923871d176ce0e5fecf4a9b7bb915af790ed)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9af41cc33471ea1efa6f77e188f055cc77d0a5c5,961e9b1e33445f8e42859ecc020c9f60d8b69a8b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9af41cc33471ea1efa6f77e188f055cc77d0a5c5,cf45d748e437b8dd2dd987f27ee79c8c86f95c88)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9af41cc33471ea1efa6f77e188f055cc77d0a5c5,cd170f051dba9ac146fabcd1b91726487c0cb9fa)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-05T10:00:03.602758+00:00", "updated": "2026-08-05T10:20:53.414190+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-690"]}