{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2022-48956 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2022-48956 is a high-severity use after free vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2022-48956 and fix it if it is affected.\n\nWhat it is: CVE-2022-48956 is a high-severity use after free vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2022-48956 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2022-48956/ (Markdown: https://insights.sbomify.com/CVE-2022-48956/index.md)","id":"CVE-2022-48956","markdown":"https://insights.sbomify.com/CVE-2022-48956/index.md","name":"CVE-2022-48956","record":{"aliases":["DEBIAN-CVE-2022-48956","GHSA-h52p-rfc4-3rcf","UBUNTU-CVE-2022-48956"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel IPv6 fragmentation code allows attackers to cause a denial of service or potentially execute code.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: avoid use-after-free in ip6_fragment()\n\nBlamed commit claimed rcu_read_lock() was held by ip6_fragment() callers.\n\nIt seems to not be always true, at least for UDP stack.\n\nsyzbot reported:\n\nBUG: KASAN: use-after-free in ip6_dst_idev include/net/ip6_fib.h:245 [inline]\nBUG: KASAN: use-after-free in ip6_fragment+0x2724/0x2770 net/ipv6/ip6_output.c:951\nRead of size 8 at addr ffff88801d403e80 by task syz-executor.3/7618\n\nCPU: 1 PID: 7618 Comm: syz-executor.3 Not tainted 6.1.0-rc6-syzkaller-00012-g4312098baf37 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106\n print_address_description mm/kasan/report.c:284 [inline]\n print_report+0x15e/0x45d mm/kasan/report.c:395\n kasan_report+0xbf/0x1f0 mm/kasan/report.c:495\n ip6_dst_idev include/net/ip6_fib.h:245 [inline]\n ip6_fragment+0x2724/0x2770 net/ipv6/ip6_output.c:951\n __ip6_finish_output net/ipv6/ip6_output.c:193 [inline]\n ip6_finish_output+0x9a3/0x1170 net/ipv6/ip6_output.c:206\n NF_HOOK_COND include/linux/netfilter.h:291 [inline]\n ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227\n dst_output include/net/dst.h:445 [inline]\n ip6_local_out+0xb3/0x1a0 net/ipv6/output_core.c:161\n ip6_send_skb+0xbb/0x340 net/ipv6/ip6_output.c:1966\n udp_v6_send_skb+0x82a/0x18a0 net/ipv6/udp.c:1286\n udp_v6_push_pending_frames+0x140/0x200 net/ipv6/udp.c:1313\n udpv6_sendmsg+0x18da/0x2c80 net/ipv6/udp.c:1606\n inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:665\n sock_sendmsg_nosec net/socket.c:714 [inline]\n sock_sendmsg+0xd3/0x120 net/socket.c:734\n sock_write_iter+0x295/0x3d0 net/socket.c:1108\n call_write_iter include/linux/fs.h:2191 [inline]\n new_sync_write fs/read_write.c:491 [inline]\n vfs_write+0x9ed/0xdd0 fs/read_write.c:584\n ksys_write+0x1ec/0x250 fs/read_write.c:637\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7fde3588c0d9\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fde365b6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 00007fde359ac050 RCX: 00007fde3588c0d9\nRDX: 000000000000ffdc RSI: 00000000200000c0 RDI: 000000000000000a\nRBP: 00007fde358e7ae9 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fde35acfb1f R14: 00007fde365b6300 R15: 0000000000022000\n \u003c/TASK\u003e\n\nAllocated by task 7618:\n kasan_save_stack+0x22/0x40 mm/kasan/common.c:45\n kasan_set_track+0x25/0x30 mm/kasan/common.c:52\n __kasan_slab_alloc+0x82/0x90 mm/kasan/common.c:325\n kasan_slab_alloc include/linux/kasan.h:201 [inline]\n slab_post_alloc_hook mm/slab.h:737 [inline]\n slab_alloc_node mm/slub.c:3398 [inline]\n slab_alloc mm/slub.c:3406 [inline]\n __kmem_cache_alloc_lru mm/slub.c:3413 [inline]\n kmem_cache_alloc+0x2b4/0x3d0 mm/slub.c:3422\n dst_alloc+0x14a/0x1f0 net/core/dst.c:92\n ip6_dst_alloc+0x32/0xa0 net/ipv6/route.c:344\n ip6_rt_pcpu_alloc net/ipv6/route.c:1369 [inline]\n rt6_make_pcpu_route net/ipv6/route.c:1417 [inline]\n ip6_pol_route+0x901/0x1190 net/ipv6/route.c:2254\n pol_lookup_func include/net/ip6_fib.h:582 [inline]\n fib6_rule_lookup+0x52e/0x6f0 net/ipv6/fib6_rules.c:121\n ip6_route_output_flags_noref+0x2e6/0x380 net/ipv6/route.c:2625\n ip6_route_output_flags+0x76/0x320 net/ipv6/route.c:2638\n ip6_route_output include/net/ip6_route.h:98 [inline]\n ip6_dst_lookup_tail+0x5ab/0x1620 net/ipv6/ip6_output.c:1092\n ip6_dst_lookup_flow+0x90/0x1d0 net/ipv6/ip6_output.c:1222\n ip6_sk_dst_lookup_flow+0x553/0x980 net/ipv6/ip6_output.c:1260\n udpv6_sendmsg+0x151d/0x2c80 net/ipv6/udp.c:1554\n inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:665\n sock_sendmsg_nosec n\n---truncated---","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"ipv6: avoid use-after-free in ip6_fragment()","id":"CVE-2022-48956","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2022"},"n_packages":0,"n_references":7,"next":{"headline":"dpaa2-switch: Fix memory leak in dpaa2_switch_acl_entry_add() and dpaa2_switch_acl_entry_remove()","id":"CVE-2022-48957"},"packages":[],"prev":{"headline":"net: thunderbolt: fix memory leak in tbnet_open()","id":"CVE-2022-48955"},"products":["Linux"],"published":"2024-10-21","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel IPv6 fragmentation code allows attackers to cause a denial of service or potentially execute code.","url":"https://insights.sbomify.com/CVE-2022-48956/"}