CVE-2022-49058
cifs: potential buffer overflow in handling symlinks
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved: cifs: potential buffer overflow in handling symlinks Smatch printed a warning: arch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error: __memcpy() 'dctx->buf' too small (16 vs u32max) It's caused because Smatch marks 'link_len' as untrusted since it comes
from sscanf(). Add a check to ensure that 'link_len' is not larger than
the size of the 'link_str' buffer.
A buffer overflow vulnerability has been identified in the Linux kernel's Common Internet File System (CIFS) module, specifically within the parse_mf_symlink() function. This flaw is caused by insufficient input validation on the link_len value, which dictates the length of a symbolic link. An attacker could exploit this issue by providing an overly large symlink string, leading to a buffer overflow. This can result in memory corruption, system instability, or a denial-of-service condition.
An update for kernel is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service. Issues addressed include buffer overflow, out of bounds read, and use-after-free vulnerabilities.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2025-02-26 CVE Reserved
- 2025-02-26 CVE Published
- 2025-05-04 CVE Updated
- 2025-07-21 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CAPEC
References (11)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2022-49058 | 2025-07-23 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2348254 | 2025-07-23 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.37 < 4.9.311 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.37 < 4.9.311" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.37 < 4.14.276 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.37 < 4.14.276" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.37 < 4.19.239 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.37 < 4.19.239" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.37 < 5.4.190 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.37 < 5.4.190" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.37 < 5.10.112 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.37 < 5.10.112" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.37 < 5.15.35 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.37 < 5.15.35" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.37 < 5.17.4 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.37 < 5.17.4" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.37 < 5.18 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.37 < 5.18" | en |
Affected
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