CVE-2024-50263
published 2024-11-11CVE-2024-50263: In the Linux kernel, the following vulnerability has been resolved: fork: only invoke khugepaged, ksm hooks if no error There is no reason to invoke these…
PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.21%
12.0th percentile
In the Linux kernel, the following vulnerability has been resolved:
fork: only invoke khugepaged, ksm hooks if no error
There is no reason to invoke these hooks early against an mm that is in an
incomplete state.
The change in commit d24062914837 ("fork: use __mt_dup() to duplicate
maple tree in dup_mmap()") makes this more pertinent as we may be in a
state where entries in the maple tree are not yet consistent.
Their placement early in dup_mmap() only appears to have been meaningful
for early error checking, and since functionally it'd require a very small
allocation to fail (in practice 'too small to fail') that'd only occur in
the most dire circumstances, meaning the fork would fail or be OOM'd in
any case.
Since both khugepaged and KSM tracking are there to provide optimisations
to memory performance rather than critical functionality, it doesn't
really matter all that much if, under such dire memory pressure, we fail
to register an mm with these.
As a result, we follow the example of commit d2081b2bf819 ("mm:
khugepaged: make khugepaged_enter() void function") and make ksm_fork() a
void function also.
We only expose the mm to these functions once we are done with them and
only if no error occurred in the fork operation.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.11.7-1 (forky) | linux 6.11.7-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= d2406291483775ecddaee929231a39c70c08fda2 < 3b85aa0da8cd01173b9afd1f70080fbb9576c4b0 | 3b85aa0da8cd01173b9afd1f70080fbb9576c4b0 |
| linux | linux | >= d2406291483775ecddaee929231a39c70c08fda2 < 985da552a98e27096444508ce5d853244019111f | 985da552a98e27096444508ce5d853244019111f |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.11.7-1 | 6.11.7-1 |
| linux | linux_kernel | >= 0 < 6.11.7-1 | 6.11.7-1 |
| linux | linux_kernel | >= 0 < 6.8.0-58.60 | 6.8.0-58.60 |
| linux | linux_kernel | >= 0 < 6.11.0-18.18 | 6.11.0-18.18 |
| linux | linux_kernel | >= 6.8 < 6.11.7 | 6.11.7 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
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CVE-2024-50263: In the Linux kernel, the following vulnerability has been resolved: fork: only invoke khugepaged, ksm hooks if no error There is no reason to invoke t
osv·2024-11-11·CVSS 5.5
CVE-2024-50263 [MEDIUM] CVE-2024-50263: In the Linux kernel, the following vulnerability has been resolved: fork: only invoke khugepaged, ksm hooks if no error There is no reason to invoke t
In the Linux kernel, the following vulnerability has been resolved: fork: only invoke khugepaged, ksm hooks if no error There is no reason to invoke these hooks early against an mm that is in an incomplete state. The change in commit d24062914837 ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()") makes this more pertinent as we may be in a state where entries in the maple tree are not yet consistent. Their placement early in dup_mmap() only appears to have been meaningful for early error checking, and since functionally it'd require a very small allocation to fail (in practice 'too small to fail') that'd only occur in the most dire circumstances, meaning the fork would fail or be OOM'd in any case. Since both khugepaged and KSM tracking are there to provide optimisations to mem
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CVE-2024-50263 [MEDIUM] GHSA-5mmf-rjpr-m4cj: In the Linux kernel, the following vulnerability has been resolved:
fork: only invoke khugepaged, ksm hooks if no error
There is no reason to invoke
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The change in commit d24062914837 ("fork: use __mt_dup() to duplicate
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state where entries in the maple tree are not yet consistent.
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- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- SuperH RISC architecture;
- User-Mode Linux (UML);
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Compute Acceleration Framework;
- ACPI drivers;
- Drivers core;
- RAM backed block device driver;
- Compressed RAM block device driver;
- TPM device driver;
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- CPU frequency scaling framework;
- Hardware crypto de
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- SuperH RISC architecture;
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-
Red Hat
kernel: fork: only invoke khugepaged, ksm hooks if no error
vendor_redhat·2024-11-11·CVSS 5.5
CVE-2024-50263 [MEDIUM] CWE-99 kernel: fork: only invoke khugepaged, ksm hooks if no error
kernel: fork: only invoke khugepaged, ksm hooks if no error
In the Linux kernel, the following vulnerability has been resolved:
fork: only invoke khugepaged, ksm hooks if no error
There is no reason to invoke these hooks early against an mm that is in an
incomplete state.
The change in commit d24062914837 ("fork: use __mt_dup() to duplicate
maple tree in dup_mmap()") makes this more pertinent as we may be in a
state where entries in the maple tree are not yet consistent.
Their placement early in dup_mmap() only appears to have been meaningful
for early error checking, and since functionally it'd require a very small
allocation to fail (in practice 'too small to fail') that'd only occur in
the most dire circumstances, meaning the fork would fail or be OOM'd in
any case.
Since both khugepag
Debian
CVE-2024-50263: linux - In the Linux kernel, the following vulnerability has been resolved: fork: only ...
vendor_debian·2024·CVSS 5.5
CVE-2024-50263 [MEDIUM] CVE-2024-50263: linux - In the Linux kernel, the following vulnerability has been resolved: fork: only ...
In the Linux kernel, the following vulnerability has been resolved: fork: only invoke khugepaged, ksm hooks if no error There is no reason to invoke these hooks early against an mm that is in an incomplete state. The change in commit d24062914837 ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()") makes this more pertinent as we may be in a state where entries in the maple tree are not yet consistent. Their placement early in dup_mmap() only appears to have been meaningful for early error checking, and since functionally it'd require a very small allocation to fail (in practice 'too small to fail') that'd only occur in the most dire circumstances, meaning the fork would fail or be OOM'd in any case. Since both khugepaged and KSM tracking are there to provide optimisations to mem
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2024-11-11
Published