5.5

CVE-2026-31616: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31616DEBIAN-CVE-2026-31616CGA-25jx-r9g7-qjfm
Published 24-04-2026Last modified 14-06-2026
Open JSON

Vulnerability summary

CVE-2026-31616 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.5% 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
0.17%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 45 · Related 46
OPENSUSE-SU-2026:10703-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 24-04-2026
    PublishedVulnerability first disclosed.
  2. 14-06-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_phonet: fix skb frags[] overflow in pn_rx_complete() A broken/bored/mean USB host can overflow the skb_shared_info->frags[] array on a Linux gadget exposing a Phonet function by sending an unbounded sequence of full-page OUT transfers. pn_rx_complete() finalizes the skb only when req->actual < req->length, where req->length is set to PAGE_SIZE by the gadget. If the host always sends exactly PAGE_SIZE bytes per transfer, fp->rx.skb will never be reset and each completion will add another fragment via skb_add_rx_frag(). Once nr_frags exceeds MAX_SKB_FRAGS (default 17), subsequent frag stores overwrite memory adjacent to the shinfo on the heap. Drop the skb and account a length error when the frag limit is reached, matching the fix applied in t7xx by commit f0813bcd2d9d ("net: wwan: t7xx: fix potential skb->frags overflow in RX path").

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

+0.04 pp

From 0.13% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.17%

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

Ubuntu158 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard10 products
  • linux-aws-6.12< 6.12.85-r0
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.31-r0
  • linux-gcp-6.12< 6.12.85-r0
  • linux-gcp-6.18< 6.18.31-r0
Linux2 products
  • linux≥ b91cd1440870f7a0649e570498b7b93caf9f781c, < 3d7f7e0c842242878c24b2facff8d6eda23ee1e9 | ≥ b91cd1440870f7a0649e570498b7b93caf9f781c, < b5ec49fa198bd08967a3102bd41f53ccadce72c9 | ≥ b91cd1440870f7a0649e570498b7b93caf9f781c, < 7424f0287da73d3d8c5fa5e9d25d26fce762708e | ≥ b91cd1440870f7a0649e570498b7b93caf9f781c, < 9ceff1251904901b0b4e5fe6350fcaffa368ce83 | ≥ b91cd1440870f7a0649e570498b7b93caf9f781c, < c9315ce9da3632c591666a29de82d3e92d46bec1 | ≥ b91cd1440870f7a0649e570498b7b93caf9f781c, < 4e476c25bfcab0535ba7c76a903ae77ca8747711 | ≥ b91cd1440870f7a0649e570498b7b93caf9f781c, < bd44ce09b9b569f49ed13e2d87d23d853fc7d6a7 | ≥ b91cd1440870f7a0649e570498b7b93caf9f781c, < 66f7471c4042e4eb300e30b5b9d87d1406862673 | ≥ b91cd1440870f7a0649e570498b7b93caf9f781c, < c088d5dd2fffb4de1fb8e7f57751c8b82942180a | 2.6.32
  • linux_kernel≥ 2.6.32, < 6.6.136 | ≥ 6.7, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | ≥ 7.0, < 7.0.1
Debian1 product
  • linux< 6.1.176-1 | < 6.12.85-1 | < 6.19.14-1

4 vendors · 171 products

References

45 links
Show all 45 references