CVE-2023-53669— tcp: fix skb_copy_ubufs() vs BIG TCP
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7c4e983c4f3cf94fcd879730c6caa877e0768a4d< 7fa93e39fbb0566019c388a8038a4d58552e0910 | affected |
7c4e983c4f3cf94fcd879730c6caa877e0768a4d< 3c77a377877acbaf03cd7caa21d3644a5dd16301 | affected | ||
7c4e983c4f3cf94fcd879730c6caa877e0768a4d< 9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f | affected | ||
7c4e983c4f3cf94fcd879730c6caa877e0768a4d< 7e692df3933628d974acb9f5b334d2b3e885e2a6 | affected | ||
5.19 | affected | ||
< 5.19 | unaffected | ||
6.1.29≤ 6.1.* | unaffected | ||
6.2.16≤ 6.2.* | unaffected | ||
| … +2 more rows | |||
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I. Basic Information for CVE-2023-53669
Vulnerability Information
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Vulnerability Title
tcp: fix skb_copy_ubufs() vs BIG TCP
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tcp: fix skb_copy_ubufs() vs BIG TCP David Ahern reported crashes in skb_copy_ubufs() caused by TCP tx zerocopy using hugepages, and skb length bigger than ~68 KB. skb_copy_ubufs() assumed it could copy all payload using up to MAX_SKB_FRAGS order-0 pages. This assumption broke when BIG TCP was able to put up to 512 KB per skb. We did not hit this bug at Google because we use CONFIG_MAX_SKB_FRAGS=45 and limit gso_max_size to 180000. A solution is to use higher order pages if needed. v2: add missing __GFP_COMP, or we leak memory.
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skb_copy_ubufs函数无法处理BIG TCP的大数据包，可能导致内存泄漏。
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
II. Public POCs for CVE-2023-53669
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2023-53669 (4)
Same Patch Batch · Linux · 2025-10-07 · 118 CVEs total
| CVE-2023-53629 | 9.8 CRITICAL | fs: dlm: fix use after free in midcomms commit |
| CVE-2023-53630 | 8.8 HIGH | iommufd: Fix unpinning of pages when an access is present |
| CVE-2023-53676 | 8.8 HIGH | scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() |
| CVE-2023-53675 | 8.8 HIGH | scsi: ses: Fix possible desc_ptr out-of-bounds accesses |
| CVE-2023-53673 | 8.8 HIGH | Bluetooth: hci_event: call disconnect callback before deleting conn |
| CVE-2023-53679 | 8.3 HIGH | wifi: mt7601u: fix an integer underflow |
| CVE-2023-53635 | 8.2 HIGH | netfilter: conntrack: fix wrong ct->timeout value |
| CVE-2023-53659 | 7.8 HIGH | iavf: Fix out-of-bounds when setting channels on remove |
| CVE-2023-53619 | 7.8 HIGH | netfilter: conntrack: Avoid nf_ct_helper_hash uses after free |
| CVE-2023-53660 | 7.8 HIGH | bpf, cpumap: Handle skb as well when clean up ptr_ring |
| CVE-2023-53643 | 7.8 HIGH | nvme-tcp: don't access released socket during error recovery |
| CVE-2023-53645 | 7.8 HIGH | bpf: Make bpf_refcount_acquire fallible for non-owning refs |
| CVE-2023-53646 | 7.8 HIGH | drm/i915/perf: add sentinel to xehp_oa_b_counters |
| CVE-2023-53626 | 7.8 HIGH | ext4: fix possible double unlock when moving a directory |
| CVE-2023-53627 | 7.8 HIGH | scsi: hisi_sas: Grab sas_dev lock when traversing the members of sas_dev.list |
| CVE-2022-50528 | 7.8 HIGH | drm/amdkfd: Fix memory leakage |
| CVE-2023-53674 | 7.8 HIGH | clk: Fix memory leak in devm_clk_notifier_register() |
| CVE-2022-50543 | 7.8 HIGH | RDMA/rxe: Fix mr->map double free |
| CVE-2022-50517 | 7.8 HIGH | mm/huge_memory: do not clobber swp_entry_t during THP split |
| CVE-2023-53683 | 7.8 HIGH | fs: hfsplus: remove WARN_ON() from hfsplus_cat_{read,write}_inode() |
Showing top 20 of 118 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
Same vendor: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
V. Comments for CVE-2023-53669
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