CVE-2026-43232: In the Linux kernel, the following vulnerability has been resolved: net: wan: farsync: Fix use-after-free bug

Q: How do I fix CVE-2026-43232?

linux kernel: upgrade to 4.10, 4.15, 4.20, 5.5, 5.10.252, 5.15.202, 6.1, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-43232 being exploited?

CVE-2026-43232 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-43232 affect?

CVE-2026-43232 affects linux kernel. Severity is high (CVSS 8.8). In the Linux kernel, the following vulnerability has been resolved: net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets When the FarSync T-series card is being detached, the fst_card_info is deallocated in fst_remove_

Q: How urgent is CVE-2026-43232?

Priority 44/100. High severity; On your watchlist

This month

HIGH 8.8WATCHLISTUPGRADE

CVE-2026-43232 is a high-severity flaw (CVSS 8.8) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the Linux kernel, the following vulnerability has been resolved: net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets When the FarSync T-series card is being detached, the fst_card_info is deallocated in fst_remove_one(). However, the fst_tx_task or fst_int_task may still be running or pending, leading to use-after-free bugs when the already freed fst_card_info is accessed in fst_process_tx_work_q() or fst_process_int_wor

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-05-06
Last modified	2026-06-17

Publisher (CNA): kernel.org · Vendor: linux

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-06 12:16 UTCPublished CVE record published
2026-06-17 10:49 UTCUpdated Record last modified

linux linux kernel UPGRADE

Affected: >= 4.9.337 and < 4.10 · >= 4.14.303 and < 4.15 · >= 4.19.270 and < 4.20 · >= 5.4.229 and < 5.5 · >= 5.10.163 and < 5.10.252 · >= 5.15.86 and < 5.15.202 · >= 6.0.16 and < 6.1 · >= 6.1.2 and < 6.1.165

Fixed in: 4.10, 4.15, 4.20, 5.5, 5.10.252, 5.15.202, 6.1, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-43232?

linux kernel: upgrade to 4.10, 4.15, 4.20, 5.5, 5.10.252, 5.15.202, 6.1, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6. Exact commands for each OS are on this page.

Is CVE-2026-43232 being exploited?

CVE-2026-43232 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-43232 affect?

CVE-2026-43232 affects linux kernel. Severity is high (CVSS 8.8). In the Linux kernel, the following vulnerability has been resolved: net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets When the FarSync T-series card is being detached, the fst_card_info is deallocated in fst_remove_

How urgent is CVE-2026-43232?

Priority 44/100. High severity; On your watchlist

Software pages

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References

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