{
  "cveId": "CVE-2024-44939",
  "url": "https://patchblox.com/security/cve/CVE-2024-44939",
  "summary": "CVE-2024-44939 is fixed in 22 products on 1 platform, first by DEBIAN-CVE-2024-44939, released August 26, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "jfs: fix null ptr deref in dtInsertEntry",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  jfs: fix null ptr deref in dtInsertEntry  [syzbot reported] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:dtInsertEntry\u002B0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713 ... [Analyze] In dtInsertEntry(), when the pointer h has the same value as p, after writing name in UniStrncpy_to_le(), p-\u003Eheader.flag will be cleared. This will cause the previously true judgment \u0022p-\u003Eheader.flag \u0026 BT-LEAF\u0022 to change to no after writing the name operation, this leads to entering an incorrect branch and accessing the uninitialized object ih when judging this condition for the second time.  [Fix] After got the page, check freelist first, if freelist == 0 then exit dtInsert() and return -EINVAL.",
  "published": "2024-08-26T12:15:06Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "NULL Pointer Dereference",
  "epss": 0.00231,
  "epssPercentile": 0.14036,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-44939",
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