{"cve":"CVE-2024-38661","nvd":{"published":"2024-06-25T15:15:13.630","modified":"2026-06-17T07:40:49.377","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/ap: Fix crash in AP internal function modify_bitmap()\n\nA system crash like this\n\n  Failing address: 200000cb7df6f000 TEID: 200000cb7df6f403\n  Fault in home space mode while using kernel ASCE.\n  AS:00000002d71bc007 R3:00000003fe5b8007 S:000000011a446000 P:000000015660c13d\n  Oops: 0038 ilc:3 [#1] PREEMPT SMP\n  Modules linked in: mlx5_ib ...\n  CPU: 8 PID: 7556 Comm: bash Not tainted 6.9.0-rc7 #8\n  Hardware name: IBM 3931 A01 704 (LPAR)\n  Krnl PSW : 0704e00180000000 0000014b75e7b606 (ap_parse_bitmap_str+0x10e/0x1f8)\n  R: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\n  Krnl GPRS: 0000000000000001 ffffffffffffffc0 0000000000000001 00000048f96b75d3\n  000000cb00000100 ffffffffffffffff ffffffffffffffff 000000cb7df6fce0\n  000000cb7df6fce0 00000000ffffffff 000000000000002b 00000048ffffffff\n  000003ff9b2dbc80 200000cb7df6fcd8 0000014bffffffc0 000000cb7df6fbc8\n  Krnl Code: 0000014b75e7b5fc: a7840047            brc     8,0000014b75e7b68a\n  0000014b75e7b600: 18b2                lr      %r11,%r2\n  #0000014b75e7b602: a7f4000a            brc     15,0000014b75e7b616\n  >0000014b75e7b606: eb22d00000e6        laog    %r2,%r2,0(%r13)\n  0000014b75e7b60c: a7680001            lhi     %r6,1\n  0000014b75e7b610: 187b                lr      %r7,%r11\n  0000014b75e7b612: 84960021            brxh    %r9,%r6,0000014b75e7b654\n  0000014b75e7b616: 18e9                lr      %r14,%r9\n  Call 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\n  INFO: lockdep is turned off.\n  Last Breaking-Event-Address:\n  [<0000014b75e7b636>] ap_parse_bitmap_str+0x13e/0x1f8\n  Kernel panic - not syncing: Fatal exception: panic_on_oops\n\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.\n\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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-190"],"references":["https://git.kernel.org/stable/c/2062e3f1f2374102f8014d7ca286b9aa527bd558","https://git.kernel.org/stable/c/4c0bfb4e867c1ec6616a5049bd3618021e127056","https://git.kernel.org/stable/c/67011123453b91ec03671d40712fa213e94a01b9","https://git.kernel.org/stable/c/7360cef95aa1ea2b5efb7b5e2ed32e941664e1f0","https://git.kernel.org/stable/c/7c72af16abf2ec7520407098360bbba312289e05"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:52:00.836172422+00:00"},"epss":{"cve":"CVE-2024-38661","score":0.00259,"percentile":0.17623,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}