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CVE-2024-44939— jfs: fix null ptr deref in dtInsertEntry

EPSS 0.02% · P4
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I. Basic Information for CVE-2024-44939

Vulnerability Information
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Vulnerability Title
jfs: fix null ptr deref in dtInsertEntry
Source: NVD (National Vulnerability Database)
Vulnerability 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+0xd0c/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->header.flag will be cleared. This will cause the previously true judgment "p->header.flag & BT-LEAF" 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在dtInsertEntry函数中存在空指针取消引用问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ f98bf80b20f4a930589cda48a35f751a64fe0dc2 -
LinuxLinux 2.6.12 -

II. Public POCs for CVE-2024-44939

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III. Intelligence Information for CVE-2024-44939

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Same Patch Batch · Linux · 2024-08-26 · 39 CVEs total

CVE-2024-44933bnxt_en : Fix memory out-of-bounds in bnxt_fill_hw_rss_tbl()
CVE-2024-43908drm/amdgpu: Fix the null pointer dereference to ras_manager
CVE-2024-43909drm/amdgpu/pm: Fix the null pointer dereference for smu7
CVE-2024-43910bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses
CVE-2024-43911wifi: mac80211: fix NULL dereference at band check in starting tx ba session
CVE-2024-43912wifi: nl80211: disallow setting special AP channel widths
CVE-2024-43913nvme: apple: fix device reference counting
CVE-2024-43914md/raid5: avoid BUG_ON() while continue reshape after reassembling
CVE-2024-44931gpio: prevent potential speculation leaks in gpio_device_get_desc()
CVE-2024-44932idpf: fix UAFs when destroying the queues
CVE-2024-43907drm/amdgpu/pm: Fix the null pointer dereference in apply_state_adjust_rules
CVE-2024-44934net: bridge: mcast: wait for previous gc cycles when removing port
CVE-2024-44935sctp: Fix null-ptr-deref in reuseport_add_sock().
CVE-2024-44936power: supply: rt5033: Bring back i2c_set_clientdata
CVE-2024-44937platform/x86: intel-vbtn: Protect ACPI notify handler against recursion
CVE-2024-44938jfs: Fix shift-out-of-bounds in dbDiscardAG
CVE-2024-44940fou: remove warn in gue_gro_receive on unsupported protocol
CVE-2024-44941f2fs: fix to cover read extent cache access with lock
CVE-2024-44942f2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC
CVE-2024-43896ASoC: cs-amp-lib: Fix NULL pointer crash if efi.get_variable is NULL

Showing top 20 of 39 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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