In the Linux kernel, the following vulnerability has been resolved:
wifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom
Since upstream commit e75665dd0968 ("wifi: wlcore: ensure skb headroom
before skb_push"), wl1271_tx_allocate() and with it
wl1271_prepare_tx_frame() returns -EAGAIN if pskb_expand_head() fails.
However, in wlcore_tx_work_locked(), a return value of -EAGAIN from
wl1271_prepare_tx_frame() is interpreted as the aggregation buffer being
full. This causes the code to flush the buffer, put the skb back at the
head of the queue, and immediately retry the same skb in a tight while
loop.
Because wlcore_tx_work_locked() holds wl->mutex, and the retry happens
immediately with GFP_ATOMIC, this will result in an infinite loop and a
CPU soft lockup. Return -ENOMEM instead so the packet is dropped and
the loop terminates.
The problem was found by an experimental code review agent based on
gemini-3.1-pro while reviewing backports into v6.18.y.
References
Configurations
Configuration 1 (hide)
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History
27 Apr 2026, 20:15
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.19:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* |
|
| First Time |
Linux
Linux linux Kernel |
|
| CWE | CWE-835 | |
| References | () https://git.kernel.org/stable/c/12f9eef39e49716c763714bfda835a733d5f6dea - Patch | |
| References | () https://git.kernel.org/stable/c/46c670ff1ff466e5eccb3940f726586473dc053c - Patch | |
| References | () https://git.kernel.org/stable/c/980f793645540ca7a6318165cc12f49d5febeb99 - Patch | |
| References | () https://git.kernel.org/stable/c/a6dc74209462c4fe5a88718d2f3a5286886081c8 - Patch | |
| References | () https://git.kernel.org/stable/c/ceb46b40b021d21911ff8608ce4ed33c1264ad2f - Patch | |
| References | () https://git.kernel.org/stable/c/cfa64e2b3717be1da7c4c1aff7268a009e8c1610 - Patch | |
| References | () https://git.kernel.org/stable/c/deb353d9bb009638b7762cae2d0b6e8fdbb41a69 - Patch | |
| References | () https://git.kernel.org/stable/c/f2c06d718a7b85cbc59ceaa2ff3f46b178ac709c - Patch |
27 Apr 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
24 Apr 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-24 15:16
Updated : 2026-04-27 20:15
NVD link : CVE-2026-31552
Mitre link : CVE-2026-31552
CVE.ORG link : CVE-2026-31552
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-835
Loop with Unreachable Exit Condition ('Infinite Loop')