Answer in brief
CVE-2023-52775 records a High severity (CVSS 8.2) vulnerability in net/smc: avoid data corruption caused by decline. 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 8.2. 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 |
| cpe:2.3:o:linux:linux_kernel:6.7:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.7:rc2:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 <5ada292b5c504720a0acef8cae9acc62a694d19c || >=0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 <90072af9efe8c7bd7d086709014ddd44cebd5e7c || >=0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 <94a0ae698b4d5d5bb598e23228002a1491c50add || >=0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 <7234d2b5dffa5af77fd4e0deaebab509e130c6b1 || >=0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 <e6d71b437abc2f249e3b6a1ae1a7228e09c6e563 | 5ada292b5c504720a0acef8cae9acc62a694d19c, 90072af9efe8c7bd7d086709014ddd44cebd5e7c, 94a0ae698b4d5d5bb598e23228002a1491c50add, 7234d2b5dffa5af77fd4e0deaebab509e130c6b1, e6d71b437abc2f249e3b6a1ae1a7228e09c6e563 |
| Linux/Linuxgeneric | 5.8 | Not reported |
Published upstream
May 21, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: net/smc: avoid data corruption caused by decline We found a data corruption issue during testing of SMC-R on Redis applications. The benchmark has a low probability of reporting a strange error as shown below. "Error: Protocol error, got "\xe2" as reply type byte" Finally, we found that the retrieved error data was as follows: 0xE2 0xD4 0xC3 0xD9 0x04 0x00 0x2C 0x20 0xA6 0x56 0x00 0x16 0x3E 0x0C 0xCB 0x04 0x02 0x01 0x00 0x00 0x20 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xE2 It is quite obvious that this is a SMC DECLINE message, which means that the applications received SMC protocol message. We found that this was caused by the following situations: client server ¦ clc proposal -------------> ¦ clc accept <------------- ¦ clc confirm -------------> wait llc confirm send llc confirm ¦failed llc confirm ¦ x------ (after 2s)timeout wait llc confirm rsp wait decline (after 1s) timeout (after 2s) timeout ¦ decline --------------> ¦ decline <-------------- As a result, a decline message was sent in the implementation, and this message was read from TCP by the already-fallback connection. This patch double the client timeout as 2x of the server value, With this simple change, the Decline messages should never cross or collide (during Confirm link timeout). This issue requires an immediate solution, since the protocol updates involve a more long-term solution.
Quoted source text, attributed separately from HOL analysis.