{"api_version":"1","generated_at":"2026-08-12T22:06:55+00:00","cve":"CVE-2026-68426","urls":{"html":"https://cve.report/CVE-2026-68426","api":"https://cve.report/api/cve/CVE-2026-68426.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68426","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68426"},"summary":{"title":"xfrm: fix stale skb->prev after async crypto steals a GSO segment","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix stale skb->prev after async crypto steals a GSO segment\n\nskb_gso_segment() leaves the segment list head with ->prev pointing at\nthe last segment, an invariant validate_xmit_skb_list() relies on when\nit sets its tail pointer (tail = skb->prev).\n\nWhen validate_xmit_xfrm() walks a GSO list and some segments are stolen\nby async crypto (->xmit() returns -EINPROGRESS), those segments are\nunlinked from the list but the head ->prev is never updated.  If the\nlast segment is the one stolen, the returned head still has ->prev\npointing at it, even though it is now owned by the crypto engine and may\nbe freed.  validate_xmit_skb_list() later does tail->next = skb, writing\nthrough that stale pointer -- a use-after-free.\n\nRepoint skb->prev at the last retained segment before returning.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:20:36","updated_at":"2026-08-10 13:20:36"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/bbca7cc3b2b4b10afbfee99b81d9ee78f5423046","name":"https://git.kernel.org/stable/c/bbca7cc3b2b4b10afbfee99b81d9ee78f5423046","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/33e1b0d25ca0d2818c635ff80e6aa0d295e08a98","name":"https://git.kernel.org/stable/c/33e1b0d25ca0d2818c635ff80e6aa0d295e08a98","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3f4c3919baf0944ad96580467c302bc6c7758b00","name":"https://git.kernel.org/stable/c/3f4c3919baf0944ad96580467c302bc6c7758b00","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68426","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68426","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f53c723902d1ac5f0b0a11d7c9dcbff748dde74e 33e1b0d25ca0d2818c635ff80e6aa0d295e08a98 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f53c723902d1ac5f0b0a11d7c9dcbff748dde74e bbca7cc3b2b4b10afbfee99b81d9ee78f5423046 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f53c723902d1ac5f0b0a11d7c9dcbff748dde74e 3f4c3919baf0944ad96580467c302bc6c7758b00 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/xfrm/xfrm_device.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"33e1b0d25ca0d2818c635ff80e6aa0d295e08a98","status":"affected","version":"f53c723902d1ac5f0b0a11d7c9dcbff748dde74e","versionType":"git"},{"lessThan":"bbca7cc3b2b4b10afbfee99b81d9ee78f5423046","status":"affected","version":"f53c723902d1ac5f0b0a11d7c9dcbff748dde74e","versionType":"git"},{"lessThan":"3f4c3919baf0944ad96580467c302bc6c7758b00","status":"affected","version":"f53c723902d1ac5f0b0a11d7c9dcbff748dde74e","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/xfrm/xfrm_device.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.16"},{"lessThan":"4.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"4.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"4.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc4","versionStartIncluding":"4.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix stale skb->prev after async crypto steals a GSO segment\n\nskb_gso_segment() leaves the segment list head with ->prev pointing at\nthe last segment, an invariant validate_xmit_skb_list() relies on when\nit sets its tail pointer (tail = skb->prev).\n\nWhen validate_xmit_xfrm() walks a GSO list and some segments are stolen\nby async crypto (->xmit() returns -EINPROGRESS), those segments are\nunlinked from the list but the head ->prev is never updated.  If the\nlast segment is the one stolen, the returned head still has ->prev\npointing at it, even though it is now owned by the crypto engine and may\nbe freed.  validate_xmit_skb_list() later does tail->next = skb, writing\nthrough that stale pointer -- a use-after-free.\n\nRepoint skb->prev at the last retained segment before returning."}],"providerMetadata":{"dateUpdated":"2026-08-10T12:04:46.945Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/33e1b0d25ca0d2818c635ff80e6aa0d295e08a98"},{"url":"https://git.kernel.org/stable/c/bbca7cc3b2b4b10afbfee99b81d9ee78f5423046"},{"url":"https://git.kernel.org/stable/c/3f4c3919baf0944ad96580467c302bc6c7758b00"}],"title":"xfrm: fix stale skb->prev after async crypto steals a GSO segment","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68426","datePublished":"2026-08-10T12:04:46.945Z","dateReserved":"2026-07-30T09:28:09.392Z","dateUpdated":"2026-08-10T12:04:46.945Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:20:36","lastModifiedDate":"2026-08-10 13:20:36","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68426","Ordinal":"1","Title":"xfrm: fix stale skb->prev after async crypto steals a GSO segmen","CVE":"CVE-2026-68426","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68426","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix stale skb->prev after async crypto steals a GSO segment\n\nskb_gso_segment() leaves the segment list head with ->prev pointing at\nthe last segment, an invariant validate_xmit_skb_list() relies on when\nit sets its tail pointer (tail = skb->prev).\n\nWhen validate_xmit_xfrm() walks a GSO list and some segments are stolen\nby async crypto (->xmit() returns -EINPROGRESS), those segments are\nunlinked from the list but the head ->prev is never updated.  If the\nlast segment is the one stolen, the returned head still has ->prev\npointing at it, even though it is now owned by the crypto engine and may\nbe freed.  validate_xmit_skb_list() later does tail->next = skb, writing\nthrough that stale pointer -- a use-after-free.\n\nRepoint skb->prev at the last retained segment before returning.","Type":"Description","Title":"xfrm: fix stale skb->prev after async crypto steals a GSO segmen"}]}}}