CVE-2024-38661

CVE Details

Release Date:

2024-06-25

Description

In the Linux kernel, the following vulnerability has been resolved:\ns390/ap: Fix crash in AP internal function modify_bitmap()\nA system crash like this\nFailing address: 200000cb7df6f000 TEID: 200000cb7df6f403\nFault in home space mode while using kernel ASCE.\nAS:00000002d71bc007 R3:00000003fe5b8007 S:000000011a446000 P:000000015660c13d\nOops: 0038 ilc:3 [#1] PREEMPT SMP\nModules linked in: mlx5_ib ...\nCPU: 8 PID: 7556 Comm: bash Not tainted 6.9.0-rc7 #8\nHardware name: IBM 3931 A01 704 (LPAR)\nKrnl PSW : 0704e00180000000 0000014b75e7b606 (ap_parse_bitmap_str+0x10e/0x1f8)\nR:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\nKrnl GPRS: 0000000000000001 ffffffffffffffc0 0000000000000001 00000048f96b75d3\n000000cb00000100 ffffffffffffffff ffffffffffffffff 000000cb7df6fce0\n000000cb7df6fce0 00000000ffffffff 000000000000002b 00000048ffffffff\n000003ff9b2dbc80 200000cb7df6fcd8 0000014bffffffc0 000000cb7df6fbc8\nKrnl Code: 0000014b75e7b5fc: a7840047 brc 8,0000014b75e7b68a\n0000014b75e7b600: 18b2 lr %r11,%r2\n#0000014b75e7b602: a7f4000a brc 15,0000014b75e7b616\n>0000014b75e7b606: eb22d00000e6 laog %r2,%r2,0(%r13)\n0000014b75e7b60c: a7680001 lhi %r6,1\n0000014b75e7b610: 187b lr %r7,%r11\n0000014b75e7b612: 84960021 brxh %r9,%r6,0000014b75e7b654\n0000014b75e7b616: 18e9 lr %r14,%r9\nCall Trace:\n[<0000014b75e7b606>] ap_parse_bitmap_str+0x10e/0x1f8\n([<0000014b75e7b5dc>] ap_parse_bitmap_str+0xe4/0x1f8)\n[<0000014b75e7b758>] apmask_store+0x68/0x140\n[<0000014b75679196>] kernfs_fop_write_iter+0x14e/0x1e8\n[<0000014b75598524>] vfs_write+0x1b4/0x448\n[<0000014b7559894c>] ksys_write+0x74/0x100\n[<0000014b7618a440>] __do_syscall+0x268/0x328\n[<0000014b761a3558>] system_call+0x70/0x98\nINFO: lockdep is turned off.\nLast Breaking-Event-Address:\n[<0000014b75e7b636>] ap_parse_bitmap_str+0x13e/0x1f8\nKernel panic - not syncing: Fatal exception: panic_on_oops\noccured when /sys/bus/ap/a[pq]mask was updated with a relative mask value\n(like +0x10-0x12,+60,-90) with one of the numeric values exceeding INT_MAX.\nThe fix is simple: use unsigned long values for the internal variables. The\ncorrect checks are already in place in the function but a simple int for\nthe internal variables was used with the possibility to overflow.

See more information about CVE-2024-38661 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	4.4	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12581	2024-08-12
Oracle Linux version 7 (kernel-uek-container)	ELSA-2024-12585	2024-08-12
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12581	2024-08-12
Oracle Linux version 8 (kernel-uek-container)	ELSA-2024-12584	2024-08-12