CVE-2022-49055: drm/amdkfd: Check for potential null return of kmalloc_array()
Vulnerability summary
CVE-2022-49055 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.4% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 7Timeline
- 26-02-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Check for potential null return of kmalloc_array() As the kmalloc_array() may return null, the 'event_waiters[i].wait' would lead to null-pointer dereference. Therefore, it is better to check the return value of kmalloc_array() to avoid this confusion.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
19%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.27% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu107 products
- linuxAll versions (No fix recorded) | < 4.15.0-189.200 | < 5.4.0-122.138 | < 5.15.0-37.39
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1137.148 | < 5.4.0-1081.88 | < 5.15.0-1011.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ f3a398183f7b9ef78f6b71ee9f7641e046403bcb, < 32cf90a521dcc0f136db7ee5ba32bfe5f79e460e | ≥ f3a398183f7b9ef78f6b71ee9f7641e046403bcb, < 40bf32dbfef866c83a3e74800b81d79e52b6d20b | ≥ f3a398183f7b9ef78f6b71ee9f7641e046403bcb, < 94869bb0de69a812f70231b0eb480bb2f7ae73a6 | ≥ f3a398183f7b9ef78f6b71ee9f7641e046403bcb, < c7a268b33882d5feaafd29c1734456f41ba41396 | ≥ f3a398183f7b9ef78f6b71ee9f7641e046403bcb, < 1d7a5aae884ca727d41c7ed15d4c82fdb67c040c | ≥ f3a398183f7b9ef78f6b71ee9f7641e046403bcb, < f2658d5966bcee8c3eb487875f459756d4f7cdfc | ≥ f3a398183f7b9ef78f6b71ee9f7641e046403bcb, < 0a692c625e373fef692ffbc7fc41f8a025f01cb7 | ≥ f3a398183f7b9ef78f6b71ee9f7641e046403bcb, < ebbb7bb9e80305820dc2328a371c1b35679f2667 | 4.2
- linux_kernel< 4.9.311 | ≥ 4.10, < 4.14.276 | ≥ 4.15, < 4.19.239 | ≥ 4.20, < 5.4.190 | ≥ 5.5, < 5.10.112 | ≥ 5.11, < 5.15.35 | ≥ 5.16, < 5.17.4 | 5.18:rc1
Debian1 product
- linux< 5.17.6-1
3 vendors · 110 products
