{"cve":{"cve_id":"CVE-2026-52998","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_osf: fix potential NULL dereference in ttl check\n\nThe nf_osf_ttl() function accessed skb->dev to perform a local interface\naddress lookup without verifying that the device pointer was valid.\n\nAdditionally, the implementation utilized an in_dev_for_each_ifa_rcu\nloop to match the packet source address against local interface\naddresses. It assumed that packets from the same subnet should not see a\ndecrement on the initial TTL. A packet might appear it is from the same\nsubnet but it actually isn't especially in modern environments with\ncontainers and virtual switching.\n\nRemove the device dereference and interface loop. Replace the logic with\na switch statement that evaluates the TTL according to the ttl_check.","published_at":"2026-06-24T16:29:10.874000Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/f4de0777e4554a7de19c920accde6319dd530782","https://git.kernel.org/stable/c/c996a90f3071cf43683e5423da31aadbe002b8b4","https://git.kernel.org/stable/c/edc806f9122961f0d3819f7c69c14cccde31f277","https://git.kernel.org/stable/c/5d05de2f0928d81309a815ecc76d1a3ad72cbc16","https://git.kernel.org/stable/c/95be653a76793856ff8b2d8bd82c2943c23f5ca8","https://git.kernel.org/stable/c/79b90a96688e521771fa6ed3dc7864b76b8df293","https://git.kernel.org/stable/c/83fc5dd63455a779ea2dd0f7ffee3c920919d80b","https://git.kernel.org/stable/c/711987ba281fd806322a7cd244e98e2a81903114"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:22.518073Z","updated_at":"2026-06-28T23:30:49.890169Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","version_start_inclusive":true,"version_end":"f4de0777e4554a7de19c920accde6319dd530782","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384:f4de0777e4554a7de19c920accde6319dd530782"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","version_start_inclusive":true,"version_end":"c996a90f3071cf43683e5423da31aadbe002b8b4","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384:c996a90f3071cf43683e5423da31aadbe002b8b4"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","version_start_inclusive":true,"version_end":"edc806f9122961f0d3819f7c69c14cccde31f277","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384:edc806f9122961f0d3819f7c69c14cccde31f277"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","version_start_inclusive":true,"version_end":"5d05de2f0928d81309a815ecc76d1a3ad72cbc16","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384:5d05de2f0928d81309a815ecc76d1a3ad72cbc16"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","version_start_inclusive":true,"version_end":"95be653a76793856ff8b2d8bd82c2943c23f5ca8","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384:95be653a76793856ff8b2d8bd82c2943c23f5ca8"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","version_start_inclusive":true,"version_end":"79b90a96688e521771fa6ed3dc7864b76b8df293","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384:79b90a96688e521771fa6ed3dc7864b76b8df293"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","version_start_inclusive":true,"version_end":"83fc5dd63455a779ea2dd0f7ffee3c920919d80b","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384:83fc5dd63455a779ea2dd0f7ffee3c920919d80b"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384","version_start_inclusive":true,"version_end":"711987ba281fd806322a7cd244e98e2a81903114","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384:711987ba281fd806322a7cd244e98e2a81903114"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"2.6.31","version_start_inclusive":true,"version_end":"2.6.31","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:2.6.31:2.6.31"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"2.6.31","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:2.6.31"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.10.258","version_start_inclusive":true,"version_end":"5.10.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.10.258:5.10.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.15.209","version_start_inclusive":true,"version_end":"5.15.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.15.209:5.15.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.175","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.175:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.141","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.141:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.91","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.91:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.33","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.33:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.10","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/f4de0777e4554a7de19c920accde6319dd530782","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/c996a90f3071cf43683e5423da31aadbe002b8b4","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/edc806f9122961f0d3819f7c69c14cccde31f277","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/5d05de2f0928d81309a815ecc76d1a3ad72cbc16","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/95be653a76793856ff8b2d8bd82c2943c23f5ca8","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/79b90a96688e521771fa6ed3dc7864b76b8df293","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/83fc5dd63455a779ea2dd0f7ffee3c920919d80b","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/711987ba281fd806322a7cd244e98e2a81903114","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-24T16:29:10.874000Z","label":"CVE published","source":null}]}