CVE-2022-48953
published 2024-10-21CVE-2022-48953: In the Linux kernel, the following vulnerability has been resolved: rtc: cmos: Fix event handler registration ordering issue Because…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
15.8th percentile
In the Linux kernel, the following vulnerability has been resolved:
rtc: cmos: Fix event handler registration ordering issue
Because acpi_install_fixed_event_handler() enables the event
automatically on success, it is incorrect to call it before the
handler routine passed to it is ready to handle events.
Unfortunately, the rtc-cmos driver does exactly the incorrect thing
by calling cmos_wake_setup(), which passes rtc_handler() to
acpi_install_fixed_event_handler(), before cmos_do_probe(), because
rtc_handler() uses dev_get_drvdata() to get to the cmos object
pointer and the driver data pointer is only populated in
cmos_do_probe().
This leads to a NULL pointer dereference in rtc_handler() on boot
if the RTC fixed event happens to be active at the init time.
To address this issue, change the initialization ordering of the
driver so that cmos_wake_setup() is always called after a successful
cmos_do_probe() call.
While at it, change cmos_pnp_probe() to call cmos_do_probe() after
the initial if () statement used for computing the IRQ argument to
be passed to cmos_do_probe() which is cleaner than calling it in
each branch of that if () (local variable "irq" can be of type int,
because it is passed to that function as an argument of type int).
Note that commit 6492fed7d8c9 ("rtc: rtc-cmos: Do not check
ACPI_FADT_LOW_POWER_S0") caused this issue to affect a larger number
of systems, because previously it only affected systems with
ACPI_FADT_LOW_POWER_S0 set, but it is present regardless of that
commit.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.4-1 (bookworm) | linux 6.1.4-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= a474aaedac99ba86e28ef6c912a7647c482db6dd < 0bcfccb48696aba475f046c2021f0733659ce0ef | 0bcfccb48696aba475f046c2021f0733659ce0ef |
| linux | linux | >= a474aaedac99ba86e28ef6c912a7647c482db6dd < 60c6e563a843032cf6ff84b2fb732cd8754fc10d | 60c6e563a843032cf6ff84b2fb732cd8754fc10d |
| linux | linux | >= a474aaedac99ba86e28ef6c912a7647c482db6dd < 1ba745fce13d19775100eece30b0bfb8b8b10ea6 | 1ba745fce13d19775100eece30b0bfb8b8b10ea6 |
| linux | linux | >= a474aaedac99ba86e28ef6c912a7647c482db6dd < 4919d3eb2ec0ee364f7e3cf2d99646c1b224fae8 | 4919d3eb2ec0ee364f7e3cf2d99646c1b224fae8 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.178-1 | 5.10.178-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 2.6.28 < 5.10.163 | 5.10.163 |
| linux | linux_kernel | >= 5.11 < 5.15.86 | 5.15.86 |
| linux | linux_kernel | >= 5.16 < 6.0.14 | 6.0.14 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: rtc: cmos: Fix event handler registration ordering issue
vendor_redhat·2024-10-21·CVSS 5.5
CVE-2022-48953 [MEDIUM] CWE-476 kernel: rtc: cmos: Fix event handler registration ordering issue
kernel: rtc: cmos: Fix event handler registration ordering issue
In the Linux kernel, the following vulnerability has been resolved:
rtc: cmos: Fix event handler registration ordering issue
Because acpi_install_fixed_event_handler() enables the event
automatically on success, it is incorrect to call it before the
handler routine passed to it is ready to handle events.
Unfortunately, the rtc-cmos driver does exactly the incorrect thing
by calling cmos_wake_setup(), which passes rtc_handler() to
acpi_install_fixed_event_handler(), before cmos_do_probe(), because
rtc_handler() uses dev_get_drvdata() to get to the cmos object
pointer and the driver data pointer is only populated in
cmos_do_probe().
This leads to a NULL pointer dereference in rtc_handler() on boot
if the RTC fixed event happen
Debian
CVE-2022-48953: linux - In the Linux kernel, the following vulnerability has been resolved: rtc: cmos: ...
vendor_debian·2022·CVSS 5.5
CVE-2022-48953 [MEDIUM] CVE-2022-48953: linux - In the Linux kernel, the following vulnerability has been resolved: rtc: cmos: ...
In the Linux kernel, the following vulnerability has been resolved: rtc: cmos: Fix event handler registration ordering issue Because acpi_install_fixed_event_handler() enables the event automatically on success, it is incorrect to call it before the handler routine passed to it is ready to handle events. Unfortunately, the rtc-cmos driver does exactly the incorrect thing by calling cmos_wake_setup(), which passes rtc_handler() to acpi_install_fixed_event_handler(), before cmos_do_probe(), because rtc_handler() uses dev_get_drvdata() to get to the cmos object pointer and the driver data pointer is only populated in cmos_do_probe(). This leads to a NULL pointer dereference in rtc_handler() on boot if the RTC fixed event happens to be active at the init time. To address this issue, change the
OSV
CVE-2022-48953: In the Linux kernel, the following vulnerability has been resolved: rtc: cmos: Fix event handler registration ordering issue Because acpi_install_fixe
osv·2024-10-21·CVSS 5.5
CVE-2022-48953 [MEDIUM] CVE-2022-48953: In the Linux kernel, the following vulnerability has been resolved: rtc: cmos: Fix event handler registration ordering issue Because acpi_install_fixe
In the Linux kernel, the following vulnerability has been resolved: rtc: cmos: Fix event handler registration ordering issue Because acpi_install_fixed_event_handler() enables the event automatically on success, it is incorrect to call it before the handler routine passed to it is ready to handle events. Unfortunately, the rtc-cmos driver does exactly the incorrect thing by calling cmos_wake_setup(), which passes rtc_handler() to acpi_install_fixed_event_handler(), before cmos_do_probe(), because rtc_handler() uses dev_get_drvdata() to get to the cmos object pointer and the driver data pointer is only populated in cmos_do_probe(). This leads to a NULL pointer dereference in rtc_handler() on boot if the RTC fixed event happens to be active at the init time. To address this issue, change the
GHSA
GHSA-8j4x-47rq-vf32: In the Linux kernel, the following vulnerability has been resolved:
rtc: cmos: Fix event handler registration ordering issue
Because acpi_install_fi
ghsa_unreviewed·2024-10-21
CVE-2022-48953 [MEDIUM] CWE-476 GHSA-8j4x-47rq-vf32: In the Linux kernel, the following vulnerability has been resolved:
rtc: cmos: Fix event handler registration ordering issue
Because acpi_install_fi
In the Linux kernel, the following vulnerability has been resolved:
rtc: cmos: Fix event handler registration ordering issue
Because acpi_install_fixed_event_handler() enables the event
automatically on success, it is incorrect to call it before the
handler routine passed to it is ready to handle events.
Unfortunately, the rtc-cmos driver does exactly the incorrect thing
by calling cmos_wake_setup(), which passes rtc_handler() to
acpi_install_fixed_event_handler(), before cmos_do_probe(), because
rtc_handler() uses dev_get_drvdata() to get to the cmos object
pointer and the driver data pointer is only populated in
cmos_do_probe().
This leads to a NULL pointer dereference in rtc_handler() on boot
if the RTC fixed event happens to be active at the init time.
To address this issue, chang
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2024-10-21
Published