Answer in brief
CVE-2023-53669 records a High severity (CVSS 7.8) vulnerability in tcp: fix skb_copy_ubufs() vs BIG TCP. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=7c4e983c4f3cf94fcd879730c6caa877e0768a4d <7fa93e39fbb0566019c388a8038a4d58552e0910 || >=7c4e983c4f3cf94fcd879730c6caa877e0768a4d <3c77a377877acbaf03cd7caa21d3644a5dd16301 || >=7c4e983c4f3cf94fcd879730c6caa877e0768a4d <9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f || >=7c4e983c4f3cf94fcd879730c6caa877e0768a4d <7e692df3933628d974acb9f5b334d2b3e885e2a6 | 7fa93e39fbb0566019c388a8038a4d58552e0910, 3c77a377877acbaf03cd7caa21d3644a5dd16301, 9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f, 7e692df3933628d974acb9f5b334d2b3e885e2a6 |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Oct 7, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2023-53669 records a High severity (CVSS 7.8) vulnerability in tcp: fix skb_copy_ubufs() vs BIG TCP. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=7c4e983c4f3cf94fcd879730c6caa877e0768a4d <7fa93e39fbb0566019c388a8038a4d58552e0910 || >=7c4e983c4f3cf94fcd879730c6caa877e0768a4d <3c77a377877acbaf03cd7caa21d3644a5dd16301 || >=7c4e983c4f3cf94fcd879730c6caa877e0768a4d <9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f || >=7c4e983c4f3cf94fcd879730c6caa877e0768a4d <7e692df3933628d974acb9f5b334d2b3e885e2a6 | 7fa93e39fbb0566019c388a8038a4d58552e0910, 3c77a377877acbaf03cd7caa21d3644a5dd16301, 9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f, 7e692df3933628d974acb9f5b334d2b3e885e2a6 |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Oct 7, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.