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CVE-2021-47353— udf: Fix NULL pointer dereference in udf_symlink function

EPSS 0.01% · P1

Affected Version Matrix 20

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2f3d9ddd32a28803baa547e6274983b67d5e287caffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 371566f63cbd0bb6fbb25b8fe9d5798268d35af9affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< baea588a42d675e35daeaddd10fbc9700550bc4daffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3638705ecd5ad2785e996f820121c0ad15ce64b5affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 80d505aee6398cf8beb72475c7edcf1733c1c68baffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 21bf1414580c36ffc8d8de043beb3508cf812238affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< aebed6b19e51a34003d998da5ebb1dfdd2cb1d02affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5150877e4d99f85057a458daac7cd7c01005d5c6affected
… +12 more rows
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I. Basic Information for CVE-2021-47353

Vulnerability Information
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Vulnerability Title
udf: Fix NULL pointer dereference in udf_symlink function
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: udf: Fix NULL pointer dereference in udf_symlink function In function udf_symlink, epos.bh is assigned with the value returned by udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c and returns the value of sb_getblk function that could be NULL. Then, epos.bh is used without any check, causing a possible NULL pointer dereference when sb_getblk fails. This fix adds a check to validate the value of epos.bh.
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，该漏洞源于空指针取消引用。
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 ~ 2f3d9ddd32a28803baa547e6274983b67d5e287c -
LinuxLinux 2.6.12 -

II. Public POCs for CVE-2021-47353

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III. Intelligence Information for CVE-2021-47353

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Same Patch Batch · Linux · 2024-05-21 · 361 CVEs total

CVE-2021-47432lib/generic-radix-tree.c: Don't overflow in peek()
CVE-2023-52760gfs2: Fix slab-use-after-free in gfs2_qd_dealloc
CVE-2023-52757smb: client: fix potential deadlock when releasing mids
CVE-2023-52755ksmbd: fix slab out of bounds write in smb_inherit_dacl()
CVE-2023-52754media: imon: fix access to invalid resource for the second interface
CVE-2023-52753drm/amd/display: Avoid NULL dereference of timing generator
CVE-2023-52752smb: client: fix use-after-free bug in cifs_debug_data_proc_show()
CVE-2023-52751smb: client: fix use-after-free in smb2_query_info_compound()
CVE-2023-52750arm64: Restrict CPU_BIG_ENDIAN to GNU as or LLVM IAS 15.x or newer
CVE-2023-52749spi: Fix null dereference on suspend
CVE-2023-52748f2fs: avoid format-overflow warning
CVE-2022-48710drm/radeon: fix a possible null pointer dereference
CVE-2023-52742net: USB: Fix wrong-direction WARNING in plusb.c
CVE-2023-52738drm/amdgpu/fence: Fix oops due to non-matching drm_sched init/fini
CVE-2023-52740powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch
CVE-2023-52739Fix page corruption caused by racy check in __free_pages
CVE-2023-52741cifs: Fix use-after-free in rdata->read_into_pages()
CVE-2023-52743ice: Do not use WQ_MEM_RECLAIM flag for workqueue
CVE-2023-52746xfrm/compat: prevent potential spectre v1 gadget in xfrm_xlate32_attr()
CVE-2023-52747IB/hfi1: Restore allocated resources on failed copyout

Showing top 20 of 361 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47353

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