CVE-2024-56627: ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read
Vulnerability summary
CVE-2024-56627 is a high (CVSS 8.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 50.1% of scored vulnerabilities.
Not severe (CVSS 8.1, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 26 · Related 25Timeline
- 27-12-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read An offset from client could be a negative value, It could lead to an out-of-bounds read from the stream_buf. Note that this issue is coming when setting 'vfs objects = streams_xattr parameter' in ksmbd.conf.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/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:HDiffers
- NVDNIST7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HDiffers
EPSS trend
Probability
0.63%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.63% 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: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu123 products
- linux< 5.15.0-135.146 | < 6.8.0-58.60
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1080.87 | < 6.8.0-1027.29
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 6bd1bf0e8c42f10a9a9679a4c103a9032d30594d | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < de4d790dcf53be41736239d7ee63849a16ff5d10 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 27de4295522e9a33e4a3fc72f7b8193df9eebe41 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 81eed631935f2c52cdaf6691c6d48e0b06e8ad73 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < fc342cf86e2dc4d2edb0fc2ff5e28b6c7845adb9 | 5.15
- linux_kernel≥ 5.15, < 5.15.176 | ≥ 5.16, < 6.1.120 | ≥ 6.2, < 6.6.66 | ≥ 6.7, < 6.12.5 | 6.13:rc1
Debian1 product
- linux< 6.1.123-1 | < 6.12.5-1
3 vendors · 126 products
