CVE-2024-49935

Aliases:UBUNTU-CVE-2024-49935DEBIAN-CVE-2024-49935

Advisory lineage Upstream: 0 Downstream: 56

Downstream

DEBIAN-CVE-2024-49935 DLA-4008-1 DLA-4327-1 MGASA-2024-0344 MGASA-2024-0345 OPENSUSE-SU-2024:14500-1

Modified

Published: 21 Oct 2024, 18:01

Last modified:11 May 2026, 20:42

Vulnerability Summary

Overall Risk (default)

low

22/100

CVSS Score

5.5 MEDIUM

v3.1 (nvd)

EPSS Score

0.25% LOW

0% probability +0.23%

KEV

Not listed

Ransomware

No reports

Public exploits

None found

Dark Web

Not detected

Timeline

21 Oct 2024, 18:01

Published

Vulnerability first disclosed

11 May 2026, 20:42

Last Modified

Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: PAD: fix crash in exit_round_robin() The kernel occasionally crashes in cpumask_clear_cpu(), which is called within exit_round_robin(), because when executing clear_bit(nr, addr) with nr set to 0xffffffff, the address calculation may cause misalignment within the memory, leading to access to an invalid memory address. ---------- BUG: unable to handle kernel paging request at ffffffffe0740618 ... CPU: 3 PID: 2919323 Comm: acpi_pad/14 Kdump: loaded Tainted: G OE X --------- - - 4.18.0-425.19.2.el8_7.x86_64 #1 ... RIP: 0010:power_saving_thread+0x313/0x411 [acpi_pad] Code: 89 cd 48 89 d3 eb d1 48 c7 c7 55 70 72 c0 e8 64 86 b0 e4 c6 05 0d a1 02 00 01 e9 bc fd ff ff 45 89 e4 42 8b 04 a5 20 82 72 c0 <f0> 48 0f b3 05 f4 9c 01 00 42 c7 04 a5 20 82 72 c0 ff ff ff ff 31 RSP: 0018:ff72a5d51fa77ec8 EFLAGS: 00010202 RAX: 00000000ffffffff RBX: ff462981e5d8cb80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246 RBP: ff46297556959d80 R08: 0000000000000382 R09: ff46297c8d0f38d8 R10: 0000000000000000 R11: 0000000000000001 R12: 000000000000000e R13: 0000000000000000 R14: ffffffffffffffff R15: 000000000000000e FS: 0000000000000000(0000) GS:ff46297a800c0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffe0740618 CR3: 0000007e20410004 CR4: 0000000000771ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: ? acpi_pad_add+0x120/0x120 [acpi_pad] kthread+0x10b/0x130 ? set_kthread_struct+0x50/0x50 ret_from_fork+0x1f/0x40 ... CR2: ffffffffe0740618 crash> dis -lr ffffffffc0726923 ... /usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 114 0xffffffffc0726918 <power_saving_thread+776>: mov %r12d,%r12d /usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 325 0xffffffffc072691b <power_saving_thread+779>: mov -0x3f8d7de0(,%r12,4),%eax /usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./arch/x86/include/asm/bitops.h: 80 0xffffffffc0726923 <power_saving_thread+787>: lock btr %rax,0x19cf4(%rip) # 0xffffffffc0740620 <pad_busy_cpus_bits> crash> px tsk_in_cpu[14] $66 = 0xffffffff crash> px 0xffffffffc072692c+0x19cf4 $99 = 0xffffffffc0740620 crash> sym 0xffffffffc0740620 ffffffffc0740620 (b) pad_busy_cpus_bits [acpi_pad] crash> px pad_busy_cpus_bits[0] $42 = 0xfffc0 ---------- To fix this, ensure that tsk_in_cpu[tsk_index] != -1 before calling cpumask_clear_cpu() in exit_round_robin(), just as it is done in round_robin_cpu(). [ rjw: Subject edit, avoid updates to the same value ]

CVSS Metrics

v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.25%• Percentile: 16%

Affected Systems

debian•linux
< 5.10.244-1 | < 6.1.115-1 | < 6.11.4-1 | < 6.11.4-1
debian•linux-6.1
< 6.1.119-1~deb11u1
ubuntu•linux
all | < 4.4.0-276.310 | < 4.15.0-245.257 | < 5.4.0-224.244 | < 5.15.0-127.137 | < 6.8.0-54.56
ubuntu•linux-allwinner-5.19
all
ubuntu•linux-aws
< 4.4.0-1150.156 | < 4.4.0-1188.203 | < 4.15.0-1187.200 | < 5.4.0-1153.163 | < 5.15.0-1073.79 | < 6.8.0-1023.25
ubuntu•linux-aws-5.0
all
ubuntu•linux-aws-5.11
all
ubuntu•linux-aws-5.13
all
ubuntu•linux-aws-5.15
< 5.15.0-1073.79~20.04.1
ubuntu•linux-aws-5.19
all
ubuntu•linux-aws-5.3
all
ubuntu•linux-aws-5.4
< 5.4.0-1153.163~18.04.1
ubuntu•linux-aws-5.8
all
ubuntu•linux-aws-6.2
all
ubuntu•linux-aws-6.5
all
ubuntu•linux-aws-6.8
< 6.8.0-1023.25~22.04.1
ubuntu•linux-aws-fips
< 4.15.0-2125.131 | all | < 5.4.0-1153.163+fips1 | < 5.15.0-1073.79+fips1
ubuntu•linux-aws-hwe
< 4.15.0-1187.200~16.04.1
ubuntu•linux-azure
< 4.15.0-1195.210~14.04.1 | < 4.15.0-1195.210~16.04.1 | all | < 5.4.0-1156.163 | < 5.15.0-1078.87 | < 6.8.0-1025.30
ubuntu•linux-azure-4.15
< 4.15.0-1195.210
ubuntu•linux-azure-5.11
all
ubuntu•linux-azure-5.13
all
ubuntu•linux-azure-5.15
< 5.15.0-1078.87~20.04.1
ubuntu•linux-azure-5.19
all
ubuntu•linux-azure-5.3
all
ubuntu•linux-azure-5.4
< 5.4.0-1156.163~18.04.1
ubuntu•linux-azure-5.8
all
ubuntu•linux-azure-6.11
< 6.11.0-1012.12~24.04.1
ubuntu•linux-azure-6.2
all
ubuntu•linux-azure-6.5
all
ubuntu•linux-azure-6.8
< 6.8.0-1025.30~22.04.1
ubuntu•linux-azure-edge
all
ubuntu•linux-azure-fde
all | all
ubuntu•linux-azure-fde-5.19
all
ubuntu•linux-azure-fde-6.2
all
ubuntu•linux-azure-fips
< 4.15.0-2104.110 | all | < 5.4.0-1157.164+fips1 | < 5.15.0-1078.87+fips1
ubuntu•linux-azure-nvidia
< 6.8.0-1014.15
ubuntu•linux-bluefield
all | < 5.4.0-1112.119 | < 5.15.0-1057.59
ubuntu•linux-fips
< 4.4.0-1120.127 | all | < 4.15.0-1142.154 | < 5.4.0-1127.137 | < 5.15.0-127.137+fips1 | < 6.8.0-78.78+fips1
ubuntu•linux-gcp
< 4.15.0-1180.197~16.04.1 | all | < 5.4.0-1156.165 | < 5.15.0-1072.80 | < 6.8.0-1024.26
ubuntu•linux-gcp-4.15
< 4.15.0-1180.197
ubuntu•linux-gcp-5.11
all
ubuntu•linux-gcp-5.13
all
ubuntu•linux-gcp-5.15
< 5.15.0-1072.80~20.04.1
ubuntu•linux-gcp-5.19
all
ubuntu•linux-gcp-5.3
all
ubuntu•linux-gcp-5.4
< 5.4.0-1156.165~18.04.1
ubuntu•linux-gcp-5.8
all
ubuntu•linux-gcp-6.11
< 6.11.0-1011.11~24.04.1
ubuntu•linux-gcp-6.2
all

Showing first 50 affected entries in server-rendered view.