CVE-2024-26936: ksmbd: validate request buffer size in smb2_allocate_rsp_buf()
Vulnerability summary
CVE-2024-26936 is a high (CVSS 8.2) vulnerability in linux. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 49% of scored vulnerabilities.
Severe, CVSS 8.2 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 11Timeline
- 01-05-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate request buffer size in smb2_allocate_rsp_buf() The response buffer should be allocated in smb2_allocate_rsp_buf before validating request. But the fields in payload as well as smb2 header is used in smb2_allocate_rsp_buf(). This patch add simple buffer size validation to avoid potencial out-of-bounds in request buffer.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.2HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
EPSS trend
Probability
0.60%
Chance of exploitation in the next 30 days
Percentile
49%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.60% 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, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu123 products
- linuxAll versions (No fix recorded) | < 5.15.0-118.128 | < 6.8.0-38.38
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1067.73 | < 6.8.0-1011.12
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 8f3d0bf1d0c62b539d54c5b9108a845cff619b99 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 21ff9d7d223c5c19cb4334009e4c0c83a2f4d674 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 5c20b242d4fed73a93591e48bfd9772e2322fb11 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 2c27a64a2bc47d9bfc7c3cf8be14be53b1ee7cb6 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 17cf0c2794bdb6f39671265aa18aea5c22ee8c4a | 5.15
- linux_kernel≥ 5.15, < 5.15.159 | ≥ 5.16, < 6.1.88 | ≥ 6.2, < 6.6.29 | ≥ 6.7, < 6.8.8 | 6.9:rc1 | 6.9:rc2 | 6.9:rc3 | 6.9:rc4 | 6.9:rc5
Debian1 product
- linux< 6.1.90-1 | < 6.8.9-1
3 vendors · 126 products
