CVE-2021-47397 (GCVE-0-2021-47397)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2025-05-04 07:10
VLAI?
Title
sctp: break out if skb_header_pointer returns NULL in sctp_rcv_ootb
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: break out if skb_header_pointer returns NULL in sctp_rcv_ootb We should always check if skb_header_pointer's return is NULL before using it, otherwise it may cause null-ptr-deref, as syzbot reported: KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:sctp_rcv_ootb net/sctp/input.c:705 [inline] RIP: 0010:sctp_rcv+0x1d84/0x3220 net/sctp/input.c:196 Call Trace: <IRQ> sctp6_rcv+0x38/0x60 net/sctp/ipv6.c:1109 ip6_protocol_deliver_rcu+0x2e9/0x1ca0 net/ipv6/ip6_input.c:422 ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472 dst_input include/net/dst.h:460 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3acb50c18d8d6650f10919464ade4dcdaf41d62f , < 77bc7dcf0fcc1519341a91788d7a2914fcfddf6d (git)
Affected: 3acb50c18d8d6650f10919464ade4dcdaf41d62f , < 8c630a7b4f9dec63f08bd881ab77984a724a5124 (git)
Affected: 3acb50c18d8d6650f10919464ade4dcdaf41d62f , < ec018021cf445abbe8e2f3e2a7f1dcc813cb8ea1 (git)
Affected: 3acb50c18d8d6650f10919464ade4dcdaf41d62f , < 9c6591ae8e63f93c895ad5e2703c36c548aac997 (git)
Affected: 3acb50c18d8d6650f10919464ade4dcdaf41d62f , < 8180611c238e11676612eb2a9828b1c7a3a4d77b (git)
Affected: 3acb50c18d8d6650f10919464ade4dcdaf41d62f , < f7e745f8e94492a8ac0b0a26e25f2b19d342918f (git)
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    Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 4.14.249 , ≤ 4.14.* (semver)
Unaffected: 4.19.209 , ≤ 4.19.* (semver)
Unaffected: 5.4.151 , ≤ 5.4.* (semver)
Unaffected: 5.10.71 , ≤ 5.10.* (semver)
Unaffected: 5.14.10 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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