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CVE-2025-38718— sctp: linearize cloned gso packets in sctp_rcv

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于克隆的gso数据包未线性化，可能导致未初始化内存访问。

CVSS 7.8 · High EPSS 0.17% · P6

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 90017accff61ae89283ad9a51f9ac46ca01633fb< d0194e391bb493aa6cec56d177b14df6b29188d5 affected
90017accff61ae89283ad9a51f9ac46ca01633fb< 03d0cc6889e02420125510b5444b570f4bbf53d5 affected
90017accff61ae89283ad9a51f9ac46ca01633fb< cd0e92bb2b7542fb96397ffac639b4f5b099d0cb affected
90017accff61ae89283ad9a51f9ac46ca01633fb< 4506bcaabe004d07be8ff09116a3024fbd6aa965 affected
90017accff61ae89283ad9a51f9ac46ca01633fb< ea094f38d387d1b0ded5dee4a3e5720aa4ce0139 affected
90017accff61ae89283ad9a51f9ac46ca01633fb< 7d757f17bc2ef2727994ffa6d5d6e4bc4789a770 affected
90017accff61ae89283ad9a51f9ac46ca01633fb< fc66772607101bd2030a4332b3bd0ea3b3605250 affected
90017accff61ae89283ad9a51f9ac46ca01633fb< 1bd5214ea681584c5886fea3ba03e49f93a43c0e affected
… +12 more rows
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I. Basic Information for CVE-2025-38718

Vulnerability Information
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Vulnerability Title
sctp: linearize cloned gso packets in sctp_rcv
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sctp: linearize cloned gso packets in sctp_rcv A cloned head skb still shares these frag skbs in fraglist with the original head skb. It's not safe to access these frag skbs. syzbot reported two use-of-uninitialized-memory bugs caused by this: BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211 sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211 sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:998 sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331 sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1122 __release_sock+0x1da/0x330 net/core/sock.c:3106 release_sock+0x6b/0x250 net/core/sock.c:3660 sctp_wait_for_connect+0x487/0x820 net/sctp/socket.c:9360 sctp_sendmsg_to_asoc+0x1ec1/0x1f00 net/sctp/socket.c:1885 sctp_sendmsg+0x32b9/0x4a80 net/sctp/socket.c:2031 inet_sendmsg+0x25a/0x280 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:718 [inline] and BUG: KMSAN: uninit-value in sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987 sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987 sctp_inq_push+0x2a3/0x350 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x3c7/0xda0 net/sctp/input.c:331 sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148 __release_sock+0x1d3/0x330 net/core/sock.c:3213 release_sock+0x6b/0x270 net/core/sock.c:3767 sctp_wait_for_connect+0x458/0x820 net/sctp/socket.c:9367 sctp_sendmsg_to_asoc+0x223a/0x2260 net/sctp/socket.c:1886 sctp_sendmsg+0x3910/0x49f0 net/sctp/socket.c:2032 inet_sendmsg+0x269/0x2a0 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:712 [inline] This patch fixes it by linearizing cloned gso packets in sctp_rcv().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于克隆的gso数据包未线性化，可能导致未初始化内存访问。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 90017accff61ae89283ad9a51f9ac46ca01633fb ~ d0194e391bb493aa6cec56d177b14df6b29188d5 -
Linux Linux 4.8 -

II. Public POCs for CVE-2025-38718

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III. Intelligence Information for CVE-2025-38718

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Patches & Fixes for CVE-2025-38718 (1)

Same Patch Batch · Linux · 2025-09-04 · 52 CVEs total

CVE-2025-38708 9.8 CRITICAL drbd: add missing kref_get in handle_write_conflicts
CVE-2025-38724 9.8 CRITICAL nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm()
CVE-2025-38728 9.1 CRITICAL smb3: fix for slab out of bounds on mount to ksmbd
CVE-2025-38688 8.8 HIGH iommufd: Prevent ALIGN() overflow
CVE-2025-38697 7.8 HIGH jfs: upper bound check of tree index in dbAllocAG
CVE-2025-38715 7.8 HIGH hfs: fix slab-out-of-bounds in hfs_bnode_read()
CVE-2025-38717 7.8 HIGH net: kcm: Fix race condition in kcm_unattach()
CVE-2025-38714 7.8 HIGH hfsplus: fix slab-out-of-bounds in hfsplus_bnode_read()
CVE-2025-38685 7.8 HIGH fbdev: Fix vmalloc out-of-bounds write in fast_imageblit
CVE-2025-38722 7.8 HIGH habanalabs: fix UAF in export_dmabuf()
CVE-2025-38710 7.8 HIGH gfs2: Validate i_depth for exhash directories
CVE-2025-38730 7.8 HIGH io_uring/net: commit partial buffers on retry
CVE-2025-38703 7.8 HIGH drm/xe: Make dma-fences compliant with the safe access rules
CVE-2025-38679 7.3 HIGH media: venus: Fix OOB read due to missing payload bound check
CVE-2025-38687 7.3 HIGH comedi: fix race between polling and detaching
CVE-2025-38713 7.1 HIGH hfsplus: fix slab-out-of-bounds read in hfsplus_uni2asc()
CVE-2025-38707 7.1 HIGH fs/ntfs3: Add sanity check for file name
CVE-2025-38680 media: uvcvideo: Fix 1-byte out-of-bounds read in uvc_parse_format()
CVE-2025-38693 media: dvb-frontends: w7090p: fix null-ptr-deref in w7090p_tuner_write_serpar and w7090p_t
CVE-2025-38681 mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()

Showing top 20 of 52 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38718

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