5.5

CVE-2024-49938: wifi: ath9k_htc: Use __skb_set_length() for resetting urb before resubmit

Modified
AliasesUBUNTU-CVE-2024-49938DEBIAN-CVE-2024-49938
Published 21-10-2024Last modified 15-10-2026

Vulnerability summary

CVE-2024-49938 is a medium (CVSS 5.5) Access of Uninitialized Pointer vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.26%
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 54 · Related 51
DLA-4008-1DLA-4075-1MGASA-2024-0344MGASA-2024-0345OPENSUSE-SU-2024:14500-1OPENSUSE-SU-2025:14705-1

Timeline

  1. 21-10-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k_htc: Use __skb_set_length() for resetting urb before resubmit Syzbot points out that skb_trim() has a sanity check on the existing length of the skb, which can be uninitialised in some error paths. The intent here is clearly just to reset the length to zero before resubmitting, so switch to calling __skb_set_length(skb, 0) directly. In addition, __skb_set_length() already contains a call to skb_reset_tail_pointer(), so remove the redundant call. The syzbot report came from ath9k_hif_usb_reg_in_cb(), but there's a similar usage of skb_trim() in ath9k_hif_usb_rx_cb(), change both while we're at it.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.26% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu134 products
  • linuxAll versions (No fix recorded) | < 4.4.0-280.314 | < 4.15.0-249.261 | < 5.4.0-208.228 | < 5.15.0-127.137 | < 6.8.0-54.56
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1154.160 | < 4.4.0-1192.207 | < 4.15.0-1191.204 | < 5.4.0-1140.150 | < 5.15.0-1073.79 | < 6.8.0-1023.25
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ fb9987d0f748c983bb795a86f47522313f701a08, < e6b9bf32e0695e4f374674002de0527d2a6768eb | ≥ fb9987d0f748c983bb795a86f47522313f701a08, < d1f2fbc6a769081503f6ffedbb5cd1ac497f0e77 | ≥ fb9987d0f748c983bb795a86f47522313f701a08, < b02eb7c86ff2ef1411c3095ec8a52b13f68db04f | ≥ fb9987d0f748c983bb795a86f47522313f701a08, < 012ae530afa0785102360de452745d33c99a321b | ≥ fb9987d0f748c983bb795a86f47522313f701a08, < 6a875220670475d9247e576c15dc29823100a4e4 | ≥ fb9987d0f748c983bb795a86f47522313f701a08, < e37e348835032d6940ec89308cc8996ded691d2d | ≥ fb9987d0f748c983bb795a86f47522313f701a08, < 2c230210ec0ae6ed08306ac70dc21c24b817bb95 | ≥ fb9987d0f748c983bb795a86f47522313f701a08, < a9f4e28e8adaf0715bd4e01462af0a52ee46b01f | ≥ fb9987d0f748c983bb795a86f47522313f701a08, < 94745807f3ebd379f23865e6dab196f220664179 | 2.6.35
  • linux_kernel< 5.10.227 | ≥ 5.11, < 5.15.168 | ≥ 5.16, < 6.1.113 | ≥ 6.2, < 6.6.55 | ≥ 6.7, < 6.10.14 | ≥ 6.11, < 6.11.3
Debian1 product
  • linux< 6.1.115-1 | < 6.11.4-1

3 vendors · 137 products

References

54 links
Show all 54 references