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CVE-2021-3744A memory leak flaw was found in the Linux kernel in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c, which allows…
- 5.5MediumCVSS base score
- 0.53%Exploitation in 30 daysEPSS · top 54% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A memory leak flaw was found in the Linux kernel in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c, which allows attackers to cause a denial of service (memory consumption). This vulnerability is similar with the older CVE-2019-18808.
Timeline
ID reserved
By redhat
- 6 months later
· 6 months later
Published
- 2 years later
· 2 years 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 |
|---|---|---|---|
| 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)
- 0.53% · top 54% of all CVEs (14 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
kernel
- affected Fixed in v5.15-rc4 and above.
References
References11
- [oss-security] 20210914 Disclosure: CVE-2021-3744: crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd() (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- FEDORA-2021-79cbbefebe (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2021-ffda3d6fa1 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2021-9dd76a1ed0 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=2000627 (opens in a new tab)x_refsource_MISCx_transferred
- https://seclists.org/oss-sec/2021/q3/164 (opens in a new tab)x_refsource_MISCx_transferred
- https://kernel.googlesource.com/pub/scm/linux/kernel/git/herbert/crypto-2.6/+/505d9dcb0f7ddf9d075e729523a33d38642ae680%5E%21/#F0 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/torvalds/linux/commit/505d9dcb0f7ddf9d075e729523a33d38642ae680 (opens in a new tab)x_refsource_MISCx_transferred
- [debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- DSA-5096 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://www.oracle.com/security-alerts/cpujul2022.html (opens in a new tab)x_refsource_MISCx_transferred
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-2021-27020 (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-2021-3744)Record last updated .