{"cve_id":"CVE-2026-43500","published":"2026-05-11T08:16:16.077000+00:00","last_modified":"2026-08-24T13:18:47.007000+00:00","vuln_status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Also unshare DATA/RESPONSE packets when paged frags are present\n\nThe DATA-packet handler in rxrpc_input_call_event() and the RESPONSE\nhandler in rxrpc_verify_response() copy the skb to a linear one before\ncalling into the security ops only when skb_cloned() is true.  An skb\nthat is not cloned but still carries externally-owned paged fragments\n(e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via\n__ip_append_data, or a chained skb_has_frag_list()) falls through to\nthe in-place decryption path, which binds the frag pages directly into\nthe AEAD/skcipher SGL via skb_to_sgvec().\n\nExtend the gate to also unshare when skb_has_frag_list() or\nskb_has_shared_frag() is true.  This catches the splice-loopback vector\nand other externally-shared frag sources while preserving the\nzero-copy fast path for skbs whose frags are kernel-private (e.g. NIC\npage_pool RX, GRO).  The OOM/trace handling already in place is reused.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","base_score":7.8,"base_severity":"HIGH","attack_vector":"LOCAL","privileges_req":"LOW","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-787","CWE-123"],"in_kev":false,"kev_date_added":null,"kev_ransomware":false,"epss_score":0.94118,"epss_percentile":0.99848,"cap_rule_version":"0.1.1","stage":"EXECUTION","req_access":"USER","req_vector":"LOCAL","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T12:10:49.948747+00:00","first_seen":"2026-05-11T08:16:16.077000+00:00","kev_first_seen":null,"novelty_score":61.22,"novelty_reasons":["EPSS_SPIKE","HIGH_LEVERAGE_STEPPING_STONE","REACHES_TERMINAL","RAISES_REACH_COMMON_PRODUCT"],"novelty_at":"2026-11-02T03:21:44.260683+00:00","vendors":["linux"],"products":["linux_kernel"],"affected":[{"vendor":"linux","product":"linux_kernel","ranges":["> 5.3 and < 6.18.29","≥ 6.19 and < 7.0.6","5.3","7.1"]}]}