9.1

CVE-2022-49058: cifs: potential buffer overflow in handling symlinks

Modified
AliasesUBUNTU-CVE-2022-49058DEBIAN-CVE-2022-49058
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49058 is a critical (CVSS 9.1) vulnerability in linux. EPSS estimates a 0.87% chance of exploitation in the next 30 days, higher than 58.9% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.1 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.87%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16 · Related 7
RHSA-2023:2458RHSA-2025:11298RHSA-2025:11299RHSA-2025:11570RHSA-2025:12238RHSA-2025:12623

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.87%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.87% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu106 products
  • linuxAll versions (No fix recorded) | < 4.15.0-189.200 | < 5.4.0-122.138 | < 5.15.0-37.39
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1137.148 | < 5.4.0-1081.88 | < 5.15.0-1011.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131, < 3e582749e742e662a8e9bb37cffac62dccaaa1e2 | ≥ c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131, < 1316c28569a80ab3596eeab05bf5e01991e7e739 | ≥ c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131, < eb5f51756944735ac70cd8bb38637cc202e29c91 | ≥ c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131, < 22d658c6c5affed10c8907e67160cef0b6c92186 | ≥ c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131, < 4e166a41180be2f1e66bbb6d46448e80a9a5ec05 | ≥ c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131, < 9901b07ba42b39266b34a888e48d7306fd707bee | ≥ c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131, < 515e7ba11ef043d6febe69389949c8ef5f25e9d0 | ≥ c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131, < 64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304 | 2.6.37
  • linux_kernel≥ 2.6.37, < 4.9.311 | ≥ 4.10, < 4.14.276 | ≥ 4.15, < 4.19.239 | ≥ 4.20, < 5.4.190 | ≥ 5.5, < 5.10.112 | ≥ 5.11, < 5.15.35 | ≥ 5.16, < 5.17.4 | 5.18:rc1 | 5.18:rc2
Debian1 product
  • linux< 5.17.6-1

3 vendors · 109 products

References

12 links
Show all 12 references