DEBIAN-CVE-2022-49626

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Source
https://security-tracker.debian.org/tracker/CVE-2022-49626
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49626.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2022-49626
Upstream
Published
2025-02-26T07:01:37Z
Modified
2025-10-14T04:26:16.560018Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved: sfc: fix use after free when disabling sriov Use after free is detected by kfence when disabling sriov. What was read after being freed was vf->pcidev: it was freed from pcidisablesriov and later read in efxef10sriovfreevfvports, called from efxef10sriovfreevfvswitching. Set the pointer to NULL at release time to not trying to read it later. Reproducer and dmesg log (note that kfence doesn't detect it every time): $ echo 1 > /sys/class/net/enp65s0f0np0/device/sriovnumvfs $ echo 0 > /sys/class/net/enp65s0f0np0/device/sriovnumvfs BUG: KFENCE: use-after-free read in efxef10sriovfreevfvswitching+0x82/0x170 [sfc] Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224): efxef10sriovfreevfvswitching+0x82/0x170 [sfc] efxef10pcisriovdisable+0x38/0x70 [sfc] efxpcisriovconfigure+0x24/0x40 [sfc] sriovnumvfsstore+0xfe/0x140 kernfsfopwriteiter+0x11c/0x1b0 newsyncwrite+0x11f/0x1b0 vfswrite+0x1eb/0x280 ksyswrite+0x5f/0xe0 dosyscall64+0x5c/0x80 entrySYSCALL64afterhwframe+0x44/0xae kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k allocated by task 6771 on cpu 10 at 3137.860196s: pciallocdev+0x21/0x60 pciiovaddvirtfn+0x2a2/0x320 sriovenable+0x212/0x3e0 efxef10sriovconfigure+0x67/0x80 [sfc] efxpcisriovconfigure+0x24/0x40 [sfc] sriovnumvfsstore+0xba/0x140 kernfsfopwriteiter+0x11c/0x1b0 newsyncwrite+0x11f/0x1b0 vfswrite+0x1eb/0x280 ksyswrite+0x5f/0xe0 dosyscall64+0x5c/0x80 entrySYSCALL64afterhwframe+0x44/0xae freed by task 6771 on cpu 12 at 3170.991309s: devicerelease+0x34/0x90 kobjectcleanup+0x3a/0x130 pciiovremovevirtfn+0xd9/0x120 sriovdisable+0x30/0xe0 efxef10pcisriovdisable+0x57/0x70 [sfc] efxpcisriovconfigure+0x24/0x40 [sfc] sriovnumvfsstore+0xfe/0x140 kernfsfopwriteiter+0x11c/0x1b0 newsyncwrite+0x11f/0x1b0 vfswrite+0x1eb/0x280 ksyswrite+0x5f/0xe0 dosyscall64+0x5c/0x80 entrySYSCALL64afterhwframe+0x44/0xae

References

Affected packages

Debian:11 / linux

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.136-1

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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.18.14-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.18.14-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / linux

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.18.14-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}