{"id":"CVE-2026-68127","revision":"600a147c7c2c46579d671383035b9bf9","records":[{"revision":"600a147c7c2c46579d671383035b9bf9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68127","aliases":[],"title":"ila: reload IPv6 header after pskb_may_pull in checksum adjust","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nila: reload IPv6 header after pskb_may_pull in checksum adjust\n\nila_csum_adjust_transport() caches ip6h = ipv6_hdr(skb) before calling\npskb_may_pull(). On a non-linear skb whose transport header sits in a page\nfragment, pskb_may_pull() can call __pskb_pull_tail() / pskb_expand_head()\nand free the old skb head, leaving ip6h dangling; the following\nget_csum_diff(ip6h, p) then reads freed memory. ila_update_ipv6_locator()\nuses ip6h (and the iaddr derived from it) again after the csum-adjust\ncall and additionally writes the new locator through that pointer.\n\nImpact: a remote IPv6 packet routed through a configured ILA\ncsum-adjust-transport route or receive-side mapping triggers a\nslab-use-after-free in ila_update_ipv6_locator() (KASAN). The route or\nmapping requires CAP_NET_ADMIN to configure, but trigger packets are\nunauthenticated once it exists.\n\nReload ip6h after each pskb_may_pull() in ila_csum_adjust_transport()\nbefore the csum-diff read. In ila_update_ipv6_locator() only the\nILA_CSUM_ADJUST_TRANSPORT case pulls the skb, so reload ip6h and iaddr in\nthat case alone before the destination-address write; the neutral-map\nmodes never pull and keep their cached pointers.","state":0,"publishedAt":"2026-08-10T11:58:48.489+00:00","modifiedAt":"2026-10-19T20:58:52.243+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv6/ila/ila_common.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"33f11d16142b06588eedfc1dd8cf93790979a712\",\n                            \"lessThan\": \"e451a904606c571f731ef7a06b3398619dce5300\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33f11d16142b06588eedfc1dd8cf93790979a712\",\n                            \"lessThan\": \"1eadcb43893b897ade85ac5bf5c618054bc3c655\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33f11d16142b06588eedfc1dd8cf93790979a712\",\n                            \"lessThan\": \"ba353caafb06ccee57b78d3254e3cebf1dea4a93\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33f11d16142b06588eedfc1dd8cf93790979a712\",\n                            \"lessThan\": \"896a9512d0d83c2a4b357e5585b7b62a8e3f95c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33f11d16142b06588eedfc1dd8cf93790979a712\",\n                            \"lessThan\": \"7097a0280b178237265681be66d1bef11d15894b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33f11d16142b06588eedfc1dd8cf93790979a712\",\n                            \"lessThan\": \"472aba2603ca74c4f7722cb0c0296942b0776b8d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33f11d16142b06588eedfc1dd8cf93790979a712\",\n                            \"lessThan\": \"c6a13ae00dab3a1a8c7cf2f843f0fc9e8d4b0ccc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33f11d16142b06588eedfc1dd8cf93790979a712\",\n                            \"lessThan\": \"92d3817649df2b0b6a008a686c8275c88d7ef594\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv6/ila/ila_common.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.5\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.5\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.148\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.101\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.42\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.6\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/e451a904606c571f731ef7a06b3398619dce5300","https://git.kernel.org/stable/c/1eadcb43893b897ade85ac5bf5c618054bc3c655","https://git.kernel.org/stable/c/ba353caafb06ccee57b78d3254e3cebf1dea4a93","https://git.kernel.org/stable/c/896a9512d0d83c2a4b357e5585b7b62a8e3f95c1","https://git.kernel.org/stable/c/7097a0280b178237265681be66d1bef11d15894b","https://git.kernel.org/stable/c/472aba2603ca74c4f7722cb0c0296942b0776b8d","https://git.kernel.org/stable/c/c6a13ae00dab3a1a8c7cf2f843f0fc9e8d4b0ccc","https://git.kernel.org/stable/c/92d3817649df2b0b6a008a686c8275c88d7ef594"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68127","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68127","identifiers":["CVE-2026-68127"]},"retained":false,"historicalAffected":[]}],"coverage":[]}