[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2026-46099":6},{"stargazers_count":4,"fetched_at":5},8,"2026-09-19T04:32:17.889Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":17,"related":18,"reserved_at":9,"published_at":19,"modified_at":20,"state":9,"summary":21,"references_raw":23,"kevs":30,"epss":9,"epss_history":31,"metrics":32,"affected":39},"DEBIAN-CVE-2026-46099","In the Linux kernel, the following vulnerability has been resolved:  net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels  seg6_input_core() and rpl_input() call ip6_route_input() which sets a NOREF dst on the skb, then pass it to dst_cache_set_ip6() invoking dst_hold() unconditionally. On PREEMPT_RT, ksoftirqd is preemptible and a higher-priority task can release the underlying pcpu_rt between the lookup and the caching through a concurrent FIB lookup on a shared nexthop. Simplified race sequence:    ksoftirqd/X                       higher-prio task (same CPU X)   -----------                       --------------------------------   seg6_input_core(,skb)/rpl_input(skb)     dst_cache_get()       -> miss     ip6_route_input(skb)       -> ip6_pol_route(,skb,flags)          [RT6_LOOKUP_F_DST_NOREF in flags]         -> FIB lookup resolves fib6_nh            [nhid=N route]         -> rt6_make_pcpu_route()            [creates pcpu_rt, refcount=1]              pcpu_rt->sernum = fib6_sernum              [fib6_sernum=W]            -> cmpxchg(fib6_nh.rt6i_pcpu,                       NULL, pcpu_rt)               [slot was empty, store succeeds]       -> skb_dst_set_noref(skb, dst)          [dst is pcpu_rt, refcount still 1]                                      rt_genid_bump_ipv6()                                       -> bumps fib6_sernum                                          [fib6_sernum from W to Z]                                     ip6_route_output()                                       -> ip6_pol_route()                                         -> FIB lookup resolves fib6_nh                                            [nhid=N]                                         -> rt6_get_pcpu_route()                                              pcpu_rt->sernum != fib6_sernum                                              [W \u003C> Z, stale]                                           -> prev = xchg(rt6i_pcpu, NULL)                                           -> dst_release(prev)                                              [prev is pcpu_rt,                                               refcount 1->0, dead]      dst = skb_dst(skb)     [dst is the dead pcpu_rt]     dst_cache_set_ip6(dst)       -> dst_hold() on dead dst       -> WARN / use-after-free  For the race to occur, ksoftirqd must be preemptible (PREEMPT_RT without PREEMPT_RT_NEEDS_BH_LOCK) and a concurrent task must be able to release the pcpu_rt. Shared nexthop objects provide such a path, as two routes pointing to the same nhid share the same fib6_nh and its rt6i_pcpu entry.  Fix seg6_input_core() and rpl_input() by calling skb_dst_force() after ip6_route_input() to force the NOREF dst into a refcounted one before caching. The output path is not affected as ip6_route_output() already returns a refcounted dst.",null,[],[],[],[14],{"_key":15},"CVE-2026-46099",[],[],[],"2026-05-27T14:17:31.557Z","2026-07-05T20:00:45.544224478Z",{"cisa_kev":22,"cisa_ransomware":22,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[24],{"url":25,"sources":26,"tags":28},"https://security-tracker.debian.org/tracker/CVE-2026-46099",[27],"osv_debian",[29],"Advisory",[],[],[33],{"source":27,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":34,"cvss_v4_0":9},{"baseScore":35,"baseSeverity":9,"vectorString":36,"impactScore":37,"exploitabilityScore":38},8.1,"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",9.8,5.6,[40,61],{"ecosystem":41,"name":42,"vendor":43,"product":42,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":42,"source":9,"versions":45},"Debian","linux","debian","deb",[46,50,51,55,58],{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":52,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":53,"version_end_type":54,"fixed_in":9},"lt6_1_176_1","6.1.176-1","excluding",{"version":56,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":57,"version_end_type":54,"fixed_in":9},"lt6_12_86_1","6.12.86-1",{"version":59,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":60,"version_end_type":54,"fixed_in":9},"lt7_0_4_1","7.0.4-1",{"ecosystem":41,"name":62,"vendor":43,"product":62,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":62,"source":9,"versions":63},"linux-6.1",[64],{"version":65,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":66,"version_end_type":54,"fixed_in":9},"lt6_1_176_1~deb11u1","6.1.176-1~deb11u1"]