7.8

CVE-2026-46047: net: qrtr: ns: Fix use-after-free in driver remove()

Modified
AliasesUBUNTU-CVE-2026-46047DEBIAN-CVE-2026-46047
Published 27-05-2026Last modified 15-10-2026

Vulnerability summary

CVE-2026-46047 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.13%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 34 · Related 34
OPENSUSE-SU-2026:10954-1USN-8488-1USN-8488-2USN-8489-1USN-8507-1USN-8567-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Fix use-after-free in driver remove() In the remove callback, if a packet arrives after destroy_workqueue() is called, but before sock_release(), the qrtr_ns_data_ready() callback will try to queue the work, causing use-after-free issue. Fix this issue by saving the default 'sk_data_ready' callback during qrtr_ns_init() and use it to replace the qrtr_ns_data_ready() callback at the start of remove(). This ensures that even if a packet arrives after destroy_workqueue(), the work struct will not be dereferenced. Note that it is also required to ensure that the RX threads are completed before destroying the workqueue, because the threads could be using the qrtr_ns_data_ready() callback.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.17% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu147 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded) | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded) | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd, < 65168712c216584ff482a7d1a67589f2079b2634 | ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd, < dff081c3602f2fd810f69ef47945a226980dd05d | ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd, < 4ae0bd51bf7079e9c2a06b5de0ae04ba70d10167 | ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd, < 0f313eb6a8f6dffa491373cf3afab979fa1c02f4 | ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd, < db3c60ec772de30acae92d560dfcc5258e58dbe8 | ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd, < 2e127ceb1c415e246076d8e09e23e443a7a2038f | ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd, < f96779e916576e81430ebb326baff6e433fef8ae | ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd, < 7809fea20c9404bfcfa6112ec08d1fe1d3520beb | 5.7
  • linux_kernel≥ 5.7, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.86 | ≥ 6.13, < 6.18.27 | ≥ 6.19, < 7.0.4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.86-1 | < 7.0.4-1

3 vendors · 150 products

References

47 links
Show all 47 references