5.5

CVE-2022-50288: qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure

Analyzed
AliasesUBUNTU-CVE-2022-50288DEBIAN-CVE-2022-50288
Published 15-09-2025Last modified 11-05-2026

Vulnerability summary

CVE-2022-50288 is a medium (CVSS 5.5) Use After Free vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.4% 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
0.16%
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

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
SUSE-SU-2025:03614-1SUSE-SU-2025:03615-1SUSE-SU-2025:3761-1

Timeline

  1. 15-09-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure adapter->dcb would get silently freed inside qlcnic_dcb_enable() in case qlcnic_dcb_attach() would return an error, which always happens under OOM conditions. This would lead to use-after-free because both of the existing callers invoke qlcnic_dcb_get_info() on the obtained pointer, which is potentially freed at that point. Propagate errors from qlcnic_dcb_enable(), and instead free the dcb pointer at callsite using qlcnic_dcb_free(). This also removes the now unused qlcnic_clear_dcb_ops() helper, which was a simple wrapper around kfree() also causing memory leaks for partially initialized dcb. Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.16% 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.

Ubuntu120 products
  • linuxAll versions (No fix recorded) | < 4.15.0-208.220 | < 5.4.0-144.161 | < 5.15.0-69.76
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1153.166 | < 5.4.0-1097.105 | < 5.15.0-1033.37
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 3c44bba1d270cb1620b4fe76786d0968118cb86b, < 36999236f0b12d5de21a6f40e93b570727b9ceb2 | ≥ 3c44bba1d270cb1620b4fe76786d0968118cb86b, < d12a7510293d3370b234b0b7c5eda33e58786768 | ≥ 3c44bba1d270cb1620b4fe76786d0968118cb86b, < 8f97eeb02a553cdc78c83a0596448a370e1518c4 | ≥ 3c44bba1d270cb1620b4fe76786d0968118cb86b, < 513787ff9a331b461115e8a145a983d650a84fcb | ≥ 3c44bba1d270cb1620b4fe76786d0968118cb86b, < 95df720e64a6409d8152827a776c43f615e3321a | ≥ 3c44bba1d270cb1620b4fe76786d0968118cb86b, < 8df1dc04ce0e4c03b51a756749c250a9cb17d707 | ≥ 3c44bba1d270cb1620b4fe76786d0968118cb86b, < a2a694e6edbdb3efb34e1613a31fdcf6cf444a55 | ≥ 3c44bba1d270cb1620b4fe76786d0968118cb86b, < 13a7c8964afcd8ca43c0b6001ebb0127baa95362 | 3.14
  • linux_kernel≥ 3.14, < 4.14.303 | ≥ 4.15, < 4.19.270 | ≥ 4.20, < 5.4.229 | ≥ 5.5, < 5.10.163 | ≥ 5.11, < 5.15.87 | ≥ 5.16, < 6.0.19 | ≥ 6.1, < 6.1.5 | 6.2:rc1 | 6.2:rc2
Debian1 product
  • linux< 6.1.7-1

3 vendors · 123 products

References

12 links
Show all 12 references