CVE-2022-49674: dm raid: fix accesses beyond end of raid member array
Vulnerability summary
CVE-2022-49674 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.5% of scored vulnerabilities.
Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 11 · Related 7Timeline
- 26-02-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: dm raid: fix accesses beyond end of raid member array On dm-raid table load (using raid_ctr), dm-raid allocates an array rs->devs[rs->raid_disks] for the raid device members. rs->raid_disks is defined by the number of raid metadata and image tupples passed into the target's constructor. In the case of RAID layout changes being requested, that number can be different from the current number of members for existing raid sets as defined in their superblocks. Example RAID layout changes include: - raid1 legs being added/removed - raid4/5/6/10 number of stripes changed (stripe reshaping) - takeover to higher raid level (e.g. raid5 -> raid6) When accessing array members, rs->raid_disks must be used in control loops instead of the potentially larger value in rs->md.raid_disks. Otherwise it will cause memory access beyond the end of the rs->devs array. Fix this by changing code that is prone to out-of-bounds access. Also fix validate_raid_redundancy() to validate all devices that are added. Also, use braces to help clean up raid_iterate_devices(). The out-of-bounds memory accesses was discovered using KASAN. This commit was verified to pass all LVM2 RAID tests (with KASAN enabled).
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
22%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.29% 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.
Ubuntu112 products
- linuxAll versions (No fix recorded) | < 4.15.0-194.205 | < 5.4.0-128.144 | < 5.15.0-48.54
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1142.154 | < 5.4.0-1086.93 | < 5.15.0-1020.24
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 33e53f06850f44ec9722e08a993ecf8816e447a5, < 5e161a8826b63c0b8b43e4a7fad1f956780f42ab | ≥ 33e53f06850f44ec9722e08a993ecf8816e447a5, < df1a5ab0dd0775f2ea101c71f2addbc4c0ea0f85 | ≥ 33e53f06850f44ec9722e08a993ecf8816e447a5, < 90de15357504c8097ab29769dc6852e16281e9e8 | ≥ 33e53f06850f44ec9722e08a993ecf8816e447a5, < 9bf2b0757b04c78dc5d6e3a198acca98457b32a1 | ≥ 33e53f06850f44ec9722e08a993ecf8816e447a5, < 6352b2f4d8e95ec0ae576d7705435d64cfa29503 | ≥ 33e53f06850f44ec9722e08a993ecf8816e447a5, < bcff98500ea3b4e7615ec31d2bdd326bc1ef5134 | ≥ 33e53f06850f44ec9722e08a993ecf8816e447a5, < 332bd0778775d0cf105c4b9e03e460b590749916 | 4.8
- linux_kernel< 4.14.287 | ≥ 4.15, < 4.19.251 | ≥ 4.20, < 5.4.204 | ≥ 5.5, < 5.10.129 | ≥ 5.11, < 5.15.53 | ≥ 5.16, < 5.18.10 | 5.19:rc1 | 5.19:rc2 | 5.19:rc3 | 5.19:rc4
Debian1 product
- linux< 5.18.14-1
3 vendors · 115 products
