CVE-2021-47397

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47397
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

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/77bc7dcf0fcc1519341a91788d7a2914fcfddf6d Patch
https://git.kernel.org/stable/c/8180611c238e11676612eb2a9828b1c7a3a4d77b Patch
https://git.kernel.org/stable/c/8c630a7b4f9dec63f08bd881ab77984a724a5124 Patch
https://git.kernel.org/stable/c/9c6591ae8e63f93c895ad5e2703c36c548aac997 Patch
https://git.kernel.org/stable/c/ec018021cf445abbe8e2f3e2a7f1dcc813cb8ea1 Patch
https://git.kernel.org/stable/c/f7e745f8e94492a8ac0b0a26e25f2b19d342918f Patch
https://git.kernel.org/stable/c/77bc7dcf0fcc1519341a91788d7a2914fcfddf6d Patch
https://git.kernel.org/stable/c/8180611c238e11676612eb2a9828b1c7a3a4d77b Patch
https://git.kernel.org/stable/c/8c630a7b4f9dec63f08bd881ab77984a724a5124 Patch
https://git.kernel.org/stable/c/9c6591ae8e63f93c895ad5e2703c36c548aac997 Patch
https://git.kernel.org/stable/c/ec018021cf445abbe8e2f3e2a7f1dcc813cb8ea1 Patch
https://git.kernel.org/stable/c/f7e745f8e94492a8ac0b0a26e25f2b19d342918f Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
History

24 Dec 2024, 16:06

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
CWE CWE-476
CPE cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/77bc7dcf0fcc1519341a91788d7a2914fcfddf6d - () https://git.kernel.org/stable/c/77bc7dcf0fcc1519341a91788d7a2914fcfddf6d - Patch
References () https://git.kernel.org/stable/c/8180611c238e11676612eb2a9828b1c7a3a4d77b - () https://git.kernel.org/stable/c/8180611c238e11676612eb2a9828b1c7a3a4d77b - Patch
References () https://git.kernel.org/stable/c/8c630a7b4f9dec63f08bd881ab77984a724a5124 - () https://git.kernel.org/stable/c/8c630a7b4f9dec63f08bd881ab77984a724a5124 - Patch
References () https://git.kernel.org/stable/c/9c6591ae8e63f93c895ad5e2703c36c548aac997 - () https://git.kernel.org/stable/c/9c6591ae8e63f93c895ad5e2703c36c548aac997 - Patch
References () https://git.kernel.org/stable/c/ec018021cf445abbe8e2f3e2a7f1dcc813cb8ea1 - () https://git.kernel.org/stable/c/ec018021cf445abbe8e2f3e2a7f1dcc813cb8ea1 - Patch
References () https://git.kernel.org/stable/c/f7e745f8e94492a8ac0b0a26e25f2b19d342918f - () https://git.kernel.org/stable/c/f7e745f8e94492a8ac0b0a26e25f2b19d342918f - Patch
Information

Published : 2024-05-21 15:15

Updated : 2024-12-24 16:06

NVD link : CVE-2021-47397

Mitre link : CVE-2021-47397

CVE.ORG link : CVE-2021-47397

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference