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CVE-2021-47397— sctp: break out if skb_header_pointer returns NULL in sctp_rcv_ootb

EPSS 0.01% · P2

Affected Version Matrix 14

VendorProductVersion RangeStatus
LinuxLinux3acb50c18d8d6650f10919464ade4dcdaf41d62f< 77bc7dcf0fcc1519341a91788d7a2914fcfddf6daffected
3acb50c18d8d6650f10919464ade4dcdaf41d62f< 8c630a7b4f9dec63f08bd881ab77984a724a5124affected
3acb50c18d8d6650f10919464ade4dcdaf41d62f< ec018021cf445abbe8e2f3e2a7f1dcc813cb8ea1affected
3acb50c18d8d6650f10919464ade4dcdaf41d62f< 9c6591ae8e63f93c895ad5e2703c36c548aac997affected
3acb50c18d8d6650f10919464ade4dcdaf41d62f< 8180611c238e11676612eb2a9828b1c7a3a4d77baffected
3acb50c18d8d6650f10919464ade4dcdaf41d62f< f7e745f8e94492a8ac0b0a26e25f2b19d342918faffected
4.8affected
< 4.8unaffected
… +6 more rows
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I. Basic Information for CVE-2021-47397

Vulnerability Information
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Vulnerability Title
sctp: break out if skb_header_pointer returns NULL in sctp_rcv_ootb
Source: NVD (National Vulnerability Database)
Vulnerability Description
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
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于sctp模块在某些时候会中断。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 3acb50c18d8d6650f10919464ade4dcdaf41d62f ~ 77bc7dcf0fcc1519341a91788d7a2914fcfddf6d -
LinuxLinux 4.8 -

II. Public POCs for CVE-2021-47397

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III. Intelligence Information for CVE-2021-47397

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Same Patch Batch · Linux · 2024-05-21 · 361 CVEs total

CVE-2021-47432lib/generic-radix-tree.c: Don't overflow in peek()
CVE-2023-52760gfs2: Fix slab-use-after-free in gfs2_qd_dealloc
CVE-2023-52757smb: client: fix potential deadlock when releasing mids
CVE-2023-52755ksmbd: fix slab out of bounds write in smb_inherit_dacl()
CVE-2023-52754media: imon: fix access to invalid resource for the second interface
CVE-2023-52753drm/amd/display: Avoid NULL dereference of timing generator
CVE-2023-52752smb: client: fix use-after-free bug in cifs_debug_data_proc_show()
CVE-2023-52751smb: client: fix use-after-free in smb2_query_info_compound()
CVE-2023-52750arm64: Restrict CPU_BIG_ENDIAN to GNU as or LLVM IAS 15.x or newer
CVE-2023-52749spi: Fix null dereference on suspend
CVE-2023-52748f2fs: avoid format-overflow warning
CVE-2022-48710drm/radeon: fix a possible null pointer dereference
CVE-2023-52742net: USB: Fix wrong-direction WARNING in plusb.c
CVE-2023-52738drm/amdgpu/fence: Fix oops due to non-matching drm_sched init/fini
CVE-2023-52740powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch
CVE-2023-52739Fix page corruption caused by racy check in __free_pages
CVE-2023-52741cifs: Fix use-after-free in rdata->read_into_pages()
CVE-2023-52743ice: Do not use WQ_MEM_RECLAIM flag for workqueue
CVE-2023-52746xfrm/compat: prevent potential spectre v1 gadget in xfrm_xlate32_attr()
CVE-2023-52747IB/hfi1: Restore allocated resources on failed copyout

Showing top 20 of 361 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47397

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