CVE-2026-53016: crypto: ccp - copy IV using skcipher ivsize
Vulnerability summary
CVE-2026-53016 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.4% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 1 · Downstream 76 · Related 65Timeline
- 24-06-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - copy IV using skcipher ivsize AF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver. ccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV buffer while RFC3686 skciphers expose an 8-byte IV, so the restore overruns the provided buffer. Use crypto_skcipher_ivsize() to copy only the algorithm's IV length.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · Red hatEcosystem advisory · calculated8.7HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.14%
Chance of exploitation in the next 30 days
Percentile
3%
Versus all other CVEs
30-day change
Decrease -0.05 pp
From 0.19% 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 cause- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
- CWE-805Buffer Access with Incorrect Length ValueThe product uses a sequential operation to read or write a buffer, but it uses an incorrect length value that causes it to access memory that is outside of the bounds of the buffer.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu166 products
- linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-28.28
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Redhat31 products
- bpftool< 0:7.3.0-427.146.1.el9_4
- bpftool-debuginfo< 0:7.3.0-427.146.1.el9_4
- kernel< 0:5.14.0-427.146.1.el9_4
- kernel-64k< 0:5.14.0-427.146.1.el9_4
- kernel-64k-core< 0:5.14.0-427.146.1.el9_4
Linux2 products
- linux≥ 2b789435d7f36ed918d92db647f3a2f3fec9bb1f, < 939061b2d0f7f15114e34b4ce878ef50ff4089c3 | ≥ 2b789435d7f36ed918d92db647f3a2f3fec9bb1f, < 798d409a8949f3f495f238549b86de2886b129bd | ≥ 2b789435d7f36ed918d92db647f3a2f3fec9bb1f, < dfb2cf434829819268fe50f41542aad318ad62b2 | ≥ 2b789435d7f36ed918d92db647f3a2f3fec9bb1f, < eecee15e263ccb8cd77170a56ab6c969cb54dd6a | ≥ 2b789435d7f36ed918d92db647f3a2f3fec9bb1f, < bb01d8f1f385bc9034ca114d3508c7fdea24fc9a | ≥ 2b789435d7f36ed918d92db647f3a2f3fec9bb1f, < df9784bb5b637ac80f4a2768a58ca9a50bef28a9 | ≥ 2b789435d7f36ed918d92db647f3a2f3fec9bb1f, < 227c1e1d9e2aa4cfc65ba446d5690da1f546cda4 | ≥ 2b789435d7f36ed918d92db647f3a2f3fec9bb1f, < a7a1f3cdd64d8a165d9b8c9e9ad7fb46ac19dfc4 | 3.14
- linux_kernel≥ 3.14, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.141 | ≥ 6.7, < 6.12.91 | ≥ 6.13, < 6.18.33 | ≥ 6.19, < 7.0.10
Debian1 product
- linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.10-1
4 vendors · 200 products · Showing 200 of 245
References
73 links- bugzilla.redhat.com/show_bug.cgi?id=2492269Issue TrackingX Refsource REDHATREPORTThird Party Advisory
Show all 73 references
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53016.jsonX Sadp Csaf VexThird Party Advisory
