5.5

CVE-2026-31677: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31677DEBIAN-CVE-2026-31677CGA-28pm-mhf7-j269
Published 25-04-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-31677 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.4% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.11%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 29 · Related 28
OPENSUSE-SU-2026:21555-1RHSA-2026:19074RHSA-2026:19225SUSE-SU-2026:22521-1SUSE-SU-2026:22522-1SUSE-SU-2026:22665-1

Timeline

  1. 25-04-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - limit RX SG extraction by receive buffer budget Make af_alg_get_rsgl() limit each RX scatterlist extraction to the remaining receive buffer budget. af_alg_get_rsgl() currently uses af_alg_readable() only as a gate before extracting data into the RX scatterlist. Limit each extraction to the remaining af_alg_rcvbuf(sk) budget so that receive-side accounting matches the amount of data attached to the request. If skcipher cannot obtain enough RX space for at least one chunk while more data remains to be processed, reject the recvmsg call instead of rounding the request length down to zero.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

0.00 pp

From 0.11% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.11%

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

No weakness data has been published for this record.

Affected systems

Ubuntu156 products
  • linuxAll versions (No fix recorded) | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard5 products
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.24-r1 | < 6.18.31-r0
  • linux-gcp-6.18< 6.18.31-r0
  • linux-qemu-6.18< 6.18.24-r3
  • linux-vmware-6.18< 6.18.31-r0
Linux2 products
  • linux≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < 7e345de2e69475430af85e09210795d8eb8e719c | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < 9bf3e6ccfdcfe56ae3190d1ae987dacf1cfef4f9 | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < 07c6f6ffe29009426f0bd4d3cfbb6308b8ea8453 | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < 4a264b2614c73c96666e196bbabe0cead52bdba7 | ≥ e870456d8e7c8d57c059ea479b5aadbb55ff4c3a, < 8eceab19eba9dcbfd2a0daec72e1bf48aa100170 | 4.14
  • linux_kernel≥ 4.14, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.85-1 | < 6.19.14-1

4 vendors · 164 products

References

23 links
Show all 23 references