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CVE-2025-21844smb: client: Add check for next_buffer in receive_encrypted_standard()
- 7.5HighCVSS base score
- 0.62%Exploitation in 30 daysEPSS · top 50% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: Add check for next_buffer in receive_encrypted_standard() Add check for the return value of cifs_buf_get() and cifs_small_buf_get() in receive_encrypted_standard() to prevent null pointer dereference.
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 19 months later
· 19 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.62% · top 50% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected b03c8099a738a04d2343547ae6a04e5f0f63d3fa – < f277e479eea3d1aa18bc712abe1d2bf3dece2e30
- affected 858e73ff25639a0cc1f6f8d2587b62c045867e41 – < f618aeb6cad2307e48a641379db610abcf593edf
- affected 9f528a8e68327117837b5e28b096f52af4c26a05 – < 24e8e4523d3071bc5143b0db9127d511489f7b3b
- affected 534733397da26de0303057ce0b93a22bda150365 – < 9e5d99a4cf2e23c716b44862975548415fae5391
- affected eec04ea119691e65227a97ce53c0da6b9b74b0b7 – < a9b0b4b29877cb4dc5d0842b59b5ccbacddb85bd
- affected eec04ea119691e65227a97ce53c0da6b9b74b0b7 – < 554736b583f529ee159aa95af9a0cbc12b5ffc96
- affected eec04ea119691e65227a97ce53c0da6b9b74b0b7 – < 860ca5e50f73c2a1cef7eefc9d39d04e275417f7
- affected 5.10.211 – < 5.10.235
- affected 5.15.150 – < 5.15.179
- affected 6.1.69 – < 6.1.130
- affected 6.6.8 – < 6.6.80
- affected 6.7
- unaffected < 6.7
- unaffected 5.10.235 – ≤ 5.10.*
- unaffected 5.15.179 – ≤ 5.15.*
- unaffected 6.1.130 – ≤ 6.1.*
- unaffected 6.6.80 – ≤ 6.6.*
- unaffected 6.12.17 – ≤ 6.12.*
- unaffected 6.13.5 – ≤ 6.13.*
- unaffected 6.14 – ≤ *
References
References11
- https://git.kernel.org/stable/c/f277e479eea3d1aa18bc712abe1d2bf3dece2e30 (opens in a new tab)
- https://git.kernel.org/stable/c/f618aeb6cad2307e48a641379db610abcf593edf (opens in a new tab)
- https://git.kernel.org/stable/c/24e8e4523d3071bc5143b0db9127d511489f7b3b (opens in a new tab)
- https://git.kernel.org/stable/c/9e5d99a4cf2e23c716b44862975548415fae5391 (opens in a new tab)
- https://git.kernel.org/stable/c/a9b0b4b29877cb4dc5d0842b59b5ccbacddb85bd (opens in a new tab)
- https://git.kernel.org/stable/c/554736b583f529ee159aa95af9a0cbc12b5ffc96 (opens in a new tab)
- https://git.kernel.org/stable/c/860ca5e50f73c2a1cef7eefc9d39d04e275417f7 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-6293 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-21844)Record last updated .