7.8

CVE-2026-43078: linux Out-of-bounds Write

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-43078DEBIAN-CVE-2026-43078
Published 06-05-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-43078 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.6% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.18%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 31
USN-8278-1USN-8278-2USN-8279-1USN-8289-1USN-8289-2USN-8374-1

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Fix page reassignment overflow in af_alg_pull_tsgl When page reassignment was added to af_alg_pull_tsgl the original loop wasn't updated so it may try to reassign one more page than necessary. Add the check to the reassignment so that this does not happen. Also update the comment which still refers to the obsolete offset argument.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

+0.05 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu155 products
  • linux< 4.15.0-250.262 | < 5.4.0-230.250 | < 5.15.0-179.189 | < 6.8.0-117.117 | < 6.17.0-29.29
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.15.0-1192.205 | < 5.4.0-1159.169 | < 5.15.0-1108.115 | < 6.8.0-1055.58 | < 6.17.0-1015.15
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < fa48d3ea9cdbfb28c1fd6756c6c5cd01351aa51e | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < 2b781d1d4f933990318bcc5c68fb75a717379e42 | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < f7826bc0b39928a4a22f6b815dd9940b22a63503 | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < 710a4ce5d7afd9fe082c75dec282ab4a11c0fe71 | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < c8369a6d62f5abde9cbd4b62c45bf4b996be2468 | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < dea5fcf085f977b6c2de1b2d4ec4767b6c840d1f | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < 9532501e0f1b200ea80baa0e33e0b06da10bb271 | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < 31d00156e50ecad37f2cb6cbf04aaa9a260505ef | 4.14
  • linux_kernelEOL≥ 4.14.1, < 5.10.254 | ≥ 5.11, < 5.15.204 | ≥ 5.16, < 6.1.170 | ≥ 6.2, < 6.6.137 | ≥ 6.7, < 6.12.85 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | 4.14 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.14-1

3 vendors · 158 products

References

43 links
Show all 43 references