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-rt is now available for Red Hat Enterprise Linux 8. Issues addressed include buffer overflow, double free, 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 | 2025-07-16 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2348254 | 2025-07-16 |
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
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| 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
| ||||||
| 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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