5.5

CVE-2021-46949: sfc: farch: fix TX queue lookup in TX flush done handling

Modified
AliasesUBUNTU-CVE-2021-46949DEBIAN-CVE-2021-46949
Published 27-02-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-46949 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 27-02-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: sfc: farch: fix TX queue lookup in TX flush done handling We're starting from a TXQ instance number ('qid'), not a TXQ type, so efx_get_tx_queue() is inappropriate (and could return NULL, leading to panics).

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.22% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu62 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 12804793b17c0e19115a90d98f2f3df0cb79e233, < fb791572d6747ef385f628450f8d57cd132e6e5a | ≥ 12804793b17c0e19115a90d98f2f3df0cb79e233, < a1570985ec04116cc665b760faf666a104154170 | ≥ 12804793b17c0e19115a90d98f2f3df0cb79e233, < 98d91180748986bfb6dfb3e72765f3225719a647 | ≥ 12804793b17c0e19115a90d98f2f3df0cb79e233, < 5b1faa92289b53cad654123ed2bc8e10f6ddd4ac | 5.10
  • linux_kernel≥ 5.10.0, < 5.10.36 | ≥ 5.11.0, < 5.11.20 | ≥ 5.12.0, < 5.12.3
Debian1 product
  • linux< 5.10.38-1

3 vendors · 65 products

References

8 links