CVE-2021-47440

LOW EPSS 11.8%
Published May 22, 20242y ago · Modified Jun 17, 20262w ago
2.3 CVSS 3.1
Low
Find Similar
Published May 22, 2024 2y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net: encx24j600: check error in devm_regmap_init_encx24j600 devm_regmap_init may return error which caused by like out of memory, this will results in null pointer dereference later when reading or writing register: general protection fault in encx24j600_spi_probe KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 0 PID: 286 Comm: spi-encx24j600- Not tainted 5.15.0-rc2-00142-g9978db750e31-dirty #11 9c53a778c1306b1b02359f3c2bbedc0222cba652 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:regcache_cache_bypass drivers/base/regmap/regcache.c:540 Code: 54 41 89 f4 55 53 48 89 fb 48 83 ec 08 e8 26 94 a8 fe 48 8d bb a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4a 03 00 00 4c 8d ab b0 00 00 00 48 8b ab a0 00 RSP: 0018:ffffc900010476b8 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 0000000000000000 RDX: 0000000000000012 RSI: ffff888002de0000 RDI: 0000000000000094 RBP: ffff888013c9a000 R08: 0000000000000000 R09: fffffbfff3f9cc6a R10: ffffc900010476e8 R11: fffffbfff3f9cc69 R12: 0000000000000001 R13: 000000000000000a R14: ffff888013c9af54 R15: ffff888013c9ad08 FS: 00007ffa984ab580(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a6384136c8 CR3: 000000003bbe6003 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: encx24j600_spi_probe drivers/net/ethernet/microchip/encx24j600.c:459 spi_probe drivers/spi/spi.c:397 really_probe drivers/base/dd.c:517 __driver_probe_device drivers/base/dd.c:751 driver_probe_device drivers/base/dd.c:782 __device_attach_driver drivers/base/dd.c:899 bus_for_each_drv drivers/base/bus.c:427 __device_attach drivers/base/dd.c:971 bus_probe_device drivers/base/bus.c:487 device_add drivers/base/core.c:3364 __spi_add_device drivers/spi/spi.c:599 spi_add_device drivers/spi/spi.c:641 spi_new_device drivers/spi/spi.c:717 new_device_store+0x18c/0x1f1 [spi_stub 4e02719357f1ff33f5a43d00630982840568e85e] dev_attr_store drivers/base/core.c:2074 sysfs_kf_write fs/sysfs/file.c:139 kernfs_fop_write_iter fs/kernfs/file.c:300 new_sync_write fs/read_write.c:508 (discriminator 4) vfs_write fs/read_write.c:594 ksys_write fs/read_write.c:648 do_syscall_64 arch/x86/entry/common.c:50 entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:113 Add error check in devm_regmap_init_encx24j600 to avoid this situation.

CVSS Details

Base Score
2.3
Exploitability
0.8
Impact
1.4
Vector string
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
Attack Vector Local
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low

Threat Intelligence

EPSS Exploit Probability
11.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 12

VendorProductVersionRange
linuxlinux_kernel*≥4.4  –  <4.4.290
linuxlinux_kernel*≥4.5  –  <4.9.288
linuxlinux_kernel*≥4.10  –  <4.14.252
linuxlinux_kernel*≥4.15  –  <4.19.213
linuxlinux_kernel*≥4.20  –  <5.4.155
linuxlinux_kernel*≥5.5  –  <5.10.75
linuxlinux_kernel*≥5.11  –  <5.14.14
linuxlinux_kernel5.15any
linuxlinux_kernel5.15any
linuxlinux_kernel5.15any
linuxlinux_kernel5.15any
linuxlinux_kernel5.15any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/322c0e53496309e634d9db7349678eaad1d25b55
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c2eb80fc90b05559ce6ed1b8dfb2348420b5644
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e5494e6fc8a29c927e0478bec4a078a40da8901
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/66358471fa75a713fd76bc8a4bd74cb14cd50a4f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e19c10d6e07c59c96e90fe053a72683ad8b0397e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f03dca0c9e2297c84a018e306f8a9cd534ee4287
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f043fac1133a6c5ef960a8422c0f6dd711dee462
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fddc7f678d7fb93caa0d7bc512f968ff1e2bddbc
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/322c0e53496309e634d9db7349678eaad1d25b55
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c2eb80fc90b05559ce6ed1b8dfb2348420b5644
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e5494e6fc8a29c927e0478bec4a078a40da8901
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/66358471fa75a713fd76bc8a4bd74cb14cd50a4f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e19c10d6e07c59c96e90fe053a72683ad8b0397e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f03dca0c9e2297c84a018e306f8a9cd534ee4287
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f043fac1133a6c5ef960a8422c0f6dd711dee462
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fddc7f678d7fb93caa0d7bc512f968ff1e2bddbc
    Patch