CVE-2022-49703

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Source
https://cve.org/CVERecord?id=CVE-2022-49703
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49703.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-49703
Downstream
Related
Published
2025-02-26T02:24:22.700Z
Modified
2026-03-11T06:46:22.462850Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
scsi: ibmvfc: Store vhost pointer during subcrq allocation
Details

In the Linux kernel, the following vulnerability has been resolved:

scsi: ibmvfc: Store vhost pointer during subcrq allocation

Currently the back pointer from a queue to the vhost adapter isn't set until after subcrq interrupt registration. The value is available when a queue is first allocated and can/should be also set for primary and async queues as well as subcrqs.

This fixes a crash observed during kexec/kdump on Power 9 with legacy XICS interrupt controller where a pending subcrq interrupt from the previous kernel can be replayed immediately upon IRQ registration resulting in dereference of a garbage backpointer in ibmvfcinterruptscsi().

Kernel attempted to read user page (58) - exploit attempt? (uid: 0) BUG: Kernel NULL pointer dereference on read at 0x00000058 Faulting instruction address: 0xc008000003216a08 Oops: Kernel access of bad area, sig: 11 [#1] ... NIP [c008000003216a08] ibmvfcinterruptscsi+0x40/0xb0 [ibmvfc] LR [c0000000082079e8] __handleirqevent_percpu+0x98/0x270 Call Trace: [c000000047fa3d80] [c0000000123e6180] 0xc0000000123e6180 (unreliable) [c000000047fa3df0] [c0000000082079e8] __handleirqevent_percpu+0x98/0x270 [c000000047fa3ea0] [c000000008207d18] handleirqevent+0x98/0x188 [c000000047fa3ef0] [c00000000820f564] handlefasteoiirq+0xc4/0x310 [c000000047fa3f40] [c000000008205c60] generichandleirq+0x50/0x80 [c000000047fa3f60] [c000000008015c40] __do_irq+0x70/0x1a0 [c000000047fa3f90] [c000000008016d7c] __doIRQ+0x9c/0x130 [c000000014622f60] [0000000020000000] 0x20000000 [c000000014622ff0] [c000000008016e50] doIRQ+0x40/0xa0 [c000000014623020] [c000000008017044] replaysoftinterrupts+0x194/0x2f0 [c000000014623210] [c0000000080172a8] arch_localirqrestore+0x108/0x170 [c000000014623240] [c000000008eb1008] rawspinunlockirqrestore+0x58/0xb0 [c000000014623270] [c00000000820b12c] __setupirq+0x49c/0x9f0 [c000000014623310] [c00000000820b7c0] requestthreadedirq+0x140/0x230 [c000000014623380] [c008000003212a50] ibmvfcregisterscsichannel+0x1e8/0x2f0 [ibmvfc] [c000000014623450] [c008000003213d1c] ibmvfcinitsubcrqs+0xc4/0x1f0 [ibmvfc] [c0000000146234d0] [c0080000032145a8] ibmvfcresetcrq+0x150/0x210 [ibmvfc] [c000000014623550] [c0080000032147c8] ibmvfcinitcrq+0x160/0x280 [ibmvfc] [c0000000146235f0] [c00800000321a9cc] ibmvfcprobe+0x2a4/0x530 [ibmvfc]

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49703.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
3034ebe26389740bb6b4a463e05afb51dc93c336
Fixed
8540f66196ca35b7b5e902932571c18b9fde0cd1
Fixed
6d38e3b614ded59da8b95377a98df969a5a5627a
Fixed
aeaadcde1a60138bceb65de3cdaeec78170b4459

Affected versions

v5.*
v5.11
v5.11-rc3
v5.11-rc4
v5.11-rc5
v5.11-rc6
v5.11-rc7
v5.12
v5.12-rc1
v5.12-rc1-dontuse
v5.12-rc2
v5.12-rc3
v5.12-rc4
v5.12-rc5
v5.12-rc6
v5.12-rc7
v5.12-rc8
v5.13
v5.13-rc1
v5.13-rc2
v5.13-rc3
v5.13-rc4
v5.13-rc5
v5.13-rc6
v5.13-rc7
v5.14
v5.14-rc1
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.15.1
v5.15.10
v5.15.11
v5.15.12
v5.15.13
v5.15.14
v5.15.15
v5.15.16
v5.15.17
v5.15.18
v5.15.19
v5.15.2
v5.15.20
v5.15.21
v5.15.22
v5.15.23
v5.15.24
v5.15.25
v5.15.26
v5.15.27
v5.15.28
v5.15.29
v5.15.3
v5.15.30
v5.15.31
v5.15.32
v5.15.33
v5.15.34
v5.15.35
v5.15.36
v5.15.37
v5.15.38
v5.15.39
v5.15.4
v5.15.40
v5.15.41
v5.15.42
v5.15.43
v5.15.44
v5.15.45
v5.15.46
v5.15.47
v5.15.48
v5.15.49
v5.15.5
v5.15.50
v5.15.6
v5.15.7
v5.15.8
v5.15.9
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.18.1
v5.18.2
v5.18.3
v5.18.4
v5.18.5
v5.18.6
v5.18.7
v5.19-rc1

Database specific

vanir_signatures 
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source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49703.json"