CVE-2021-47203: scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()
Vulnerability summary
CVE-2021-47203 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 28.2% of scored vulnerabilities.
Not severe (CVSS 8.8, adjacent network); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 12 · Related 11Timeline
- 10-04-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() When parsing the txq list in lpfc_drain_txq(), the driver attempts to pass the requests to the adapter. If such an attempt fails, a local "fail_msg" string is set and a log message output. The job is then added to a completions list for cancellation. Processing of any further jobs from the txq list continues, but since "fail_msg" remains set, jobs are added to the completions list regardless of whether a wqe was passed to the adapter. If successfully added to txcmplq, jobs are added to both lists resulting in list corruption. Fix by clearing the fail_msg string after adding a job to the completions list. This stops the subsequent jobs from being added to the completions list unless they had an appropriate failure.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.35%
Chance of exploitation in the next 30 days
Percentile
28%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.35% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu89 products
- linuxAll versions (No fix recorded) | < 4.15.0-167.175 | < 5.4.0-97.110
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1119.127 | < 5.4.0-1064.67
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984, < ad4776b5eb2e58af1226847fcd3b4f6d051674dd | ≥ 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984, < ec70d80a8642900086447ba0cdc79e3f44d42e8f | ≥ 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984, < f05a0191b90156e539cccc189b9d87ca2a4d9305 | ≥ 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984, < b291d147d0268e93ad866f8bc820ea14497abc9b | ≥ 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984, < 16bcbfb56d759c25665f786e33ec633b9508a08f | ≥ 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984, < c097bd5a59162156d9c2077a2f58732ffbaa9fca | ≥ 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984, < 814d3610c4ce86e8cf285b2cdac0057a42e82de5 | ≥ 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984, < 99154581b05c8fb22607afb7c3d66c1bace6aa5d | 2.6.36
- linux_kernel< 4.4.293 | ≥ 4.5, < 4.9.291 | ≥ 4.10, < 4.14.256 | ≥ 4.15, < 4.19.218 | ≥ 4.20, < 5.4.162 | ≥ 5.5, < 5.10.82 | ≥ 5.11, < 5.15.5
Debian1 product
- linux< 5.15.5-1
3 vendors · 92 products
