DEBIAN-CVE-2026-43232

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Source

https://security-tracker.debian.org/tracker/CVE-2026-43232

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43232.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-43232

Upstream

CVE-2026-43232

Published

2026-05-06T12:16:43.223Z

Modified

2026-06-15T19:06:25.765040200Z

Severity

8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

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 fstcardinfo is deallocated in fstremoveone(). However, the fsttxtask or fstinttask may still be running or pending, leading to use-after-free bugs when the already freed fstcardinfo is accessed in fstprocesstxworkq() or fstprocessintworkq(). A typical race condition is depicted below: CPU 0 (cleanup) | CPU 1 (tasklet) | fststartxmit() fstremoveone() | taskletschedule() unregisterhdlcdevice()| | fstprocesstxworkq() //handler kfree(card) //free | dobottomhalftx() | card-> //use The following KASAN trace was captured: ================================================================== BUG: KASAN: slab-use-after-free in dobottomhalftx+0xb88/0xd00 Read of size 4 at addr ffff88800aad101c by task ksoftirqd/3/32 ... Call Trace: <IRQ> dumpstacklvl+0x55/0x70 printreport+0xcb/0x5d0 ? dobottomhalftx+0xb88/0xd00 kasanreport+0xb8/0xf0 ? dobottomhalftx+0xb88/0xd00 dobottomhalftx+0xb88/0xd00 ? rawspinlockirqsave+0x85/0xe0 ? pfxrawspinlockirqsave+0x10/0x10 ? pfxhrtimerrunqueues+0x10/0x10 fstprocesstxworkq+0x67/0x90 taskletactioncommon+0x1fa/0x720 ? hrtimerinterrupt+0x31f/0x780 handlesoftirqs+0x176/0x530 __irqexitrcu+0xab/0xe0 sysvec_apictimerinterrupt+0x70/0x80 ... Allocated by task 41 on cpu 3 at 72.330843s: kasansavestack+0x24/0x50 kasansavetrack+0x17/0x60 __kasankmalloc+0x7f/0x90 fstaddone+0x1a5/0x1cd0 localpciprobe+0xdd/0x190 pcideviceprobe+0x341/0x480 reallyprobe+0x1c6/0x6a0 __driverprobedevice+0x248/0x310 driverprobedevice+0x48/0x210 __deviceattachdriver+0x160/0x320 bus_foreachdrv+0x101/0x190 __deviceattach+0x198/0x3a0 deviceinitialprobe+0x78/0xa0 pcibusadddevice+0x81/0xc0 pcibusadddevices+0x7e/0x190 enableslot+0x9b9/0x1130 acpiphpcheckbridge.part.0+0x2e1/0x460 acpiphphotplugnotify+0x36c/0x3c0 acpidevicehotplug+0x203/0xb10 acpihotplugworkfn+0x59/0x80 ... Freed by task 41 on cpu 1 at 75.138639s: kasansavestack+0x24/0x50 kasansavetrack+0x17/0x60 kasansavefreeinfo+0x3b/0x60 _kasanslabfree+0x43/0x70 kfree+0x135/0x410 fstremoveone+0x2ca/0x540 pcideviceremove+0xa6/0x1d0 devicereleasedriverinternal+0x364/0x530 pcistopbusdevice+0x105/0x150 pcistopandremovebusdevice+0xd/0x20 disableslot+0x116/0x260 acpiphpdisableandejectslot+0x4b/0x190 acpiphphotplugnotify+0x230/0x3c0 acpidevicehotplug+0x203/0xb10 acpihotplugworkfn+0x59/0x80 ... The buggy address belongs to the object at ffff88800aad1000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 28 bytes inside of freed 1024-byte region The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xaad0 head: order:3 mapcount:0 entiremapcount:0 nrpagesmapped:0 pincount:0 flags: 0x100000000000040(head|node=0|zone=1) pagetype: f5(slab) raw: 0100000000000040 ffff888007042dc0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 head: 0100000000000040 ffff888007042dc0 dead000000000122 0000000000000000 head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 head: 0100000000000003 ffffea00002ab401 00000000ffffffff 00000000ffffffff head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88800aad0f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88800aad0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88800aad1000: fa fb ---truncated---

References

https://security-tracker.debian.org/tracker/CVE-2026-43232

Affected packages

Debian:11 / linux

Package

Name: linux
Purl: pkg:deb/debian/linux?arch=source&distro=bullseye

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.10.257-1

Affected versions

5.*

5.10.46-4

5.10.46-5

5.10.70-1~bpo10+1

5.10.70-1

5.10.84-1

5.10.92-1~bpo10+1

5.10.92-1

5.10.92-2

5.10.103-1~bpo10+1

5.10.103-1

5.10.106-1

5.10.113-1

5.10.120-1~bpo10+1

5.10.120-1

5.10.127-1

5.10.127-2~bpo10+1

5.10.127-2

5.10.136-1

5.10.140-1

5.10.148-1

5.10.149-1

5.10.149-2

5.10.158-1

5.10.158-2

5.10.162-1

5.10.178-1

5.10.178-2

5.10.178-3

5.10.179-1

5.10.179-2

5.10.179-3

5.10.179-4

5.10.179-5

5.10.191-1

5.10.197-1

5.10.205-1

5.10.205-2

5.10.209-1

5.10.209-2

5.10.216-1

5.10.218-1

5.10.221-1

5.10.223-1

5.10.226-1

5.10.234-1

5.10.237-1

5.10.244-1

5.10.247-1

5.10.249-1

5.10.251-1

5.10.251-3

5.10.251-4

5.10.251-5

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43232.json"

Debian:12 / linux

Package

Name: linux
Purl: pkg:deb/debian/linux?arch=source&distro=bookworm

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

6.1.170-1

Affected versions

6.*

6.1.27-1

6.1.37-1

6.1.38-1

6.1.38-2~bpo11+1

6.1.38-2

6.1.38-3

6.1.38-4~bpo11+1

6.1.38-4

6.1.52-1

6.1.55-1~bpo11+1

6.1.55-1

6.1.64-1

6.1.66-1

6.1.67-1

6.1.69-1~bpo11+1

6.1.69-1

6.1.76-1~bpo11+1

6.1.76-1

6.1.82-1

6.1.85-1

6.1.90-1~bpo11+1

6.1.90-1

6.1.94-1~bpo11+1

6.1.94-1

6.1.98-1

6.1.99-1

6.1.106-1

6.1.106-2

6.1.106-3

6.1.112-1

6.1.115-1

6.1.119-1

6.1.123-1

6.1.124-1

6.1.128-1

6.1.129-1

6.1.133-1

6.1.135-1

6.1.137-1

6.1.139-1

6.1.140-1

6.1.147-1

6.1.148-1

6.1.153-1

6.1.158-1

6.1.159-1

6.1.162-1

6.1.164-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43232.json"

Debian:13 / linux

Package

Name: linux
Purl: pkg:deb/debian/linux?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

6.12.85-1

Affected versions

6.*

6.12.38-1

6.12.41-1

6.12.43-1~bpo12+1

6.12.43-1

6.12.48-1

6.12.57-1~bpo12+1

6.12.57-1

6.12.63-1~bpo12+1

6.12.63-1

6.12.69-1~bpo12+1

6.12.69-1

6.12.73-1~bpo12+1

6.12.73-1

6.12.74-1

6.12.74-2~bpo12+1

6.12.74-2

6.12.85-1~bpo12+1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43232.json"

Debian:14 / linux

Package

Name: linux
Purl: pkg:deb/debian/linux?arch=source&distro=forky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

6.19.6-1

Affected versions

6.*

6.12.38-1

6.12.41-1

6.12.43-1~bpo12+1

6.12.43-1

6.12.48-1

6.12.57-1~bpo12+1

6.12.57-1

6.12.63-1~bpo12+1

6.12.63-1

6.12.69-1~bpo12+1

6.12.69-1

6.12.73-1~bpo12+1

6.12.73-1

6.12.74-1

6.12.74-2~bpo12+1

6.12.74-2

6.12.85-1~bpo12+1

6.12.85-1

6.12.86-1~bpo12+1

6.12.86-1

6.12.88-1~bpo12+1

6.12.88-1

6.12.90-1~bpo12+1

6.12.90-1

6.12.90-2~bpo12+1

6.12.90-2

6.13~rc6-1~exp1

6.13~rc7-1~exp1

6.13.2-1~exp1

6.13.3-1~exp1

6.13.4-1~exp1

6.13.5-1~exp1

6.13.6-1~exp1

6.13.7-1~exp1

6.13.8-1~exp1

6.13.9-1~exp1

6.13.10-1~exp1

6.13.11-1~exp1

6.14.3-1~exp1

6.14.5-1~exp1

6.14.6-1~exp1

6.15~rc7-1~exp1

6.15-1~exp1

6.15.1-1~exp1

6.15.2-1~exp1

6.15.3-1~exp1

6.15.4-1~exp1

6.15.5-1~exp1

6.15.6-1~exp1

6.16~rc7-1~exp1

6.16-1~exp1

6.16.1-1~exp1

6.16.3-1~bpo13+1

6.16.3-1

6.16.5-1

6.16.6-1

6.16.7-1

6.16.8-1

6.16.9-1

6.16.10-1

6.16.11-1

6.16.12-1~bpo13+1

6.16.12-1

6.16.12-2

6.17.2-1~exp1

6.17.5-1~exp1

6.17.6-1

6.17.7-1

6.17.7-2

6.17.8-1~bpo13+1

6.17.8-1

6.17.9-1

6.17.10-1

6.17.11-1

6.17.12-1

6.17.13-1~bpo13+1

6.17.13-1

6.18~rc4-1~exp1

6.18~rc4-1~exp2

6.18~rc5-1~exp1

6.18~rc6-1~exp1

6.18~rc7-1~exp1

6.18.1-1~exp1

6.18.2-1~exp1

6.18.3-1

6.18.5-1~bpo13+1

6.18.5-1

6.18.8-1

6.18.9-1~bpo13+1

6.18.9-1

6.18.10-1

6.18.12-1~bpo13+1

6.18.12-1

6.18.13-1

6.18.14-1

6.18.15-1~bpo13+1

6.18.15-1

6.19~rc4-1~exp1

6.19~rc5-1~exp1

6.19~rc6-1~exp1

6.19~rc7-1~exp1

6.19~rc8-1~exp1

6.19-1~exp1

6.19.2-1~exp1

6.19.3-1~exp1

6.19.4-1~exp1

6.19.5-1~exp1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43232.json"