{"api_version":"1","generated_at":"2026-07-23T13:23:21+00:00","cve":"CVE-2026-23326","urls":{"html":"https://cve.report/CVE-2026-23326","api":"https://cve.report/api/cve/CVE-2026-23326.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23326","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23326"},"summary":{"title":"xsk: Fix fragment node deletion to prevent buffer leak","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Fix fragment node deletion to prevent buffer leak\n\nAfter commit b692bf9a7543 (\"xsk: Get rid of xdp_buff_xsk::xskb_list_node\"),\nthe list_node field is reused for both the xskb pool list and the buffer\nfree list, this causes a buffer leak as described below.\n\nxp_free() checks if a buffer is already on the free list using\nlist_empty(&xskb->list_node). When list_del() is used to remove a node\nfrom the xskb pool list, it doesn't reinitialize the node pointers.\nThis means list_empty() will return false even after the node has been\nremoved, causing xp_free() to incorrectly skip adding the buffer to the\nfree list.\n\nFix this by using list_del_init() instead of list_del() in all fragment\nhandling paths, this ensures the list node is reinitialized after removal,\nallowing the list_empty() to work correctly.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-03-25 11:16:29","updated_at":"2026-04-23 21:11:17"},"problem_types":["CWE-787"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/60abb0ac11dccd6b98fd9182bc5f85b621688861","name":"https://git.kernel.org/stable/c/60abb0ac11dccd6b98fd9182bc5f85b621688861","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b38cbd4af5034635cff109e08788c63f956f3a69","name":"https://git.kernel.org/stable/c/b38cbd4af5034635cff109e08788c63f956f3a69","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a9ea988465ece5b6896b1bdc144170a64e84c35","name":"https://git.kernel.org/stable/c/2a9ea988465ece5b6896b1bdc144170a64e84c35","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/645c6d8376ad4913cbffe0e0c2cca0c4febbe596","name":"https://git.kernel.org/stable/c/645c6d8376ad4913cbffe0e0c2cca0c4febbe596","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d","name":"https://git.kernel.org/stable/c/5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23326","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23326","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 560c974b7ccd95bb9ff20df77f6654283e45c9c6 5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fd5614763805d6f386bd07cc53558f88b1b1eb62 2a9ea988465ece5b6896b1bdc144170a64e84c35 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b692bf9a7543af7ad11a59d182a3757578f0ba53 645c6d8376ad4913cbffe0e0c2cca0c4febbe596 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b692bf9a7543af7ad11a59d182a3757578f0ba53 b38cbd4af5034635cff109e08788c63f956f3a69 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"23326","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/xdp_sock_drv.h","net/xdp/xsk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d","status":"affected","version":"560c974b7ccd95bb9ff20df77f6654283e45c9c6","versionType":"git"},{"lessThan":"2a9ea988465ece5b6896b1bdc144170a64e84c35","status":"affected","version":"fd5614763805d6f386bd07cc53558f88b1b1eb62","versionType":"git"},{"lessThan":"645c6d8376ad4913cbffe0e0c2cca0c4febbe596","status":"affected","version":"b692bf9a7543af7ad11a59d182a3757578f0ba53","versionType":"git"},{"lessThan":"b38cbd4af5034635cff109e08788c63f956f3a69","status":"affected","version":"b692bf9a7543af7ad11a59d182a3757578f0ba53","versionType":"git"},{"lessThan":"60abb0ac11dccd6b98fd9182bc5f85b621688861","status":"affected","version":"b692bf9a7543af7ad11a59d182a3757578f0ba53","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["include/net/xdp_sock_drv.h","net/xdp/xsk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.13"},{"lessThan":"6.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.17","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.17","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.7","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Fix fragment node deletion to prevent buffer leak\n\nAfter commit b692bf9a7543 (\"xsk: Get rid of xdp_buff_xsk::xskb_list_node\"),\nthe list_node field is reused for both the xskb pool list and the buffer\nfree list, this causes a buffer leak as described below.\n\nxp_free() checks if a buffer is already on the free list using\nlist_empty(&xskb->list_node). When list_del() is used to remove a node\nfrom the xskb pool list, it doesn't reinitialize the node pointers.\nThis means list_empty() will return false even after the node has been\nremoved, causing xp_free() to incorrectly skip adding the buffer to the\nfree list.\n\nFix this by using list_del_init() instead of list_del() in all fragment\nhandling paths, this ensures the list node is reinitialized after removal,\nallowing the list_empty() to work correctly."}],"providerMetadata":{"dateUpdated":"2026-04-13T06:05:01.188Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d"},{"url":"https://git.kernel.org/stable/c/2a9ea988465ece5b6896b1bdc144170a64e84c35"},{"url":"https://git.kernel.org/stable/c/645c6d8376ad4913cbffe0e0c2cca0c4febbe596"},{"url":"https://git.kernel.org/stable/c/b38cbd4af5034635cff109e08788c63f956f3a69"},{"url":"https://git.kernel.org/stable/c/60abb0ac11dccd6b98fd9182bc5f85b621688861"}],"title":"xsk: Fix fragment node deletion to prevent buffer leak","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23326","datePublished":"2026-03-25T10:27:19.021Z","dateReserved":"2026-01-13T15:37:45.996Z","dateUpdated":"2026-04-13T06:05:01.188Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-25 11:16:29","lastModifiedDate":"2026-04-23 21:11:17","problem_types":["CWE-787"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13.1","versionEndExcluding":"6.18.17","matchCriteriaId":"40E7536C-DA22-4B7D-9953-0343B4D9A3E6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.7","matchCriteriaId":"69245D10-0B71-485E-80C3-A64F077004D3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*","matchCriteriaId":"5A3F9505-6B98-4269-8B81-127E55A1BF00"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*","matchCriteriaId":"F253B622-8837-4245-BCE5-A7BF8FC76A16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*","matchCriteriaId":"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*","matchCriteriaId":"F666C8D8-6538-46D4-B318-87610DE64C34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*","matchCriteriaId":"02259FDA-961B-47BC-AE7F-93D7EC6E90C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*","matchCriteriaId":"58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*","matchCriteriaId":"1D2315C0-D46F-4F85-9754-F9E5E11374A6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*","matchCriteriaId":"512EE3A8-A590-4501-9A94-5D4B268D6138"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23326","Ordinal":"1","Title":"xsk: Fix fragment node deletion to prevent buffer leak","CVE":"CVE-2026-23326","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23326","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Fix fragment node deletion to prevent buffer leak\n\nAfter commit b692bf9a7543 (\"xsk: Get rid of xdp_buff_xsk::xskb_list_node\"),\nthe list_node field is reused for both the xskb pool list and the buffer\nfree list, this causes a buffer leak as described below.\n\nxp_free() checks if a buffer is already on the free list using\nlist_empty(&xskb->list_node). When list_del() is used to remove a node\nfrom the xskb pool list, it doesn't reinitialize the node pointers.\nThis means list_empty() will return false even after the node has been\nremoved, causing xp_free() to incorrectly skip adding the buffer to the\nfree list.\n\nFix this by using list_del_init() instead of list_del() in all fragment\nhandling paths, this ensures the list node is reinitialized after removal,\nallowing the list_empty() to work correctly.","Type":"Description","Title":"xsk: Fix fragment node deletion to prevent buffer leak"}]}}}