9.8
CRITICAL
CVSS 3.1
CVE-2026-72339
qede: fix off-by-one in BD ring consumption on build_skb failure
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: qede: fix off-by-one in BD ring consumption on build_skb failure qede_rx_build_skb() and qede_tpa_rx_build_skb() do not check for a NULL return from qede_build_skb(). When it returns NULL under memory pressure, the functions still consume a BD from the ring before returning NULL. The callers then recycle additional BDs, resulting in one extra BD being consumed (off-by-one). This desynchronizes the BD ring, which can corrupt DMA page reference counts and lead to SLUB freelist corruption. Commit 4e910dbe3650 ("qede: confirm skb is allocated before using") added a NULL check inside qede_build_skb() to prevent a NULL pointer dereference, but did not address the missing NULL checks in the callers, making this off-by-one reachable. Fix this by adding NULL checks for the return value of qede_build_skb() in both qede_rx_build_skb() and qede_tpa_rx_build_skb(), returning NULL immediately before any BD ring manipulation.
Details
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
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We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Address an off-by-one error in BD ring consumption to prevent memory corruption.
- Apply the kernel commit 4e910dbe3650 and subsequent fixes.
- Add NULL checks for skb allocation.
- Ensure BD ring is synchronized.
- Prevent DMA page reference count corruption.
References
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Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72339.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72339 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72339
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72339 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72339 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': 'ecc05d4b20220a09c9c69584fc46ca55248a374a', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '07be8b8adf91b7ada4c3dacce064d572a6066421', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '1624aa100c0b218181aa74e3696a389b509298cb', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '0bf78df2d3ecb1f4964ff42a7327d25845955153', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '814a5edac8c9fc04051808d5faaa93768e989281', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': 'b066420e57f3402a52c998678b4678252ac9bb63', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '982d6d6bc059c5dff37a2201c2f08c14bcfcbd20', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': 'a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/qlogic/qede/qede_fp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/qlogic/qede/qede_fp.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': 'ecc05d4b20220a09c9c69584fc46ca55248a374a', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '07be8b8adf91b7ada4c3dacce064d572a6066421', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '1624aa100c0b218181aa74e3696a389b509298cb', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '0bf78df2d3ecb1f4964ff42a7327d25845955153', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '814a5edac8c9fc04051808d5faaa93768e989281', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': 'b066420e57f3402a52c998678b4678252ac9bb63', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '982d6d6bc059c5dff37a2201c2f08c14bcfcbd20', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': 'a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/qlogic/qede/qede_fp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/qlogic/qede/qede_fp.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': 'ecc05d4b20220a09c9c69584fc46ca55248a374a', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '07be8b8adf91b7ada4c3dacce064d572a6066421', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '1624aa100c0b218181aa74e3696a389b509298cb', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '0bf78df2d3ecb1f4964ff42a7327d25845955153', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '814a5edac8c9fc04051808d5faaa93768e989281', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': 'b066420e57f3402a52c998678b4678252ac9bb63', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': '982d6d6bc059c5dff37a2201c2f08c14bcfcbd20', 'versionType': 'git'}, {'status': 'affected', 'version': '8a8633978b842c88fbcfe00d4e5dde96048f630e', 'lessThan': 'a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/qlogic/qede/qede_fp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/qlogic/qede/qede_fp.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: qede: fix off-by-one in BD ring consumption on build_skb failure qede_rx_build_skb() and qede_tpa_rx_build_skb() do not check for a NULL return from qede_build_skb(). When it returns NULL under memory pressure, the functions still consume a BD from the ring before returning NULL. The callers then recycle additional BDs, resulting in one extra BD being consumed (off-by-one). This desynchronizes the BD ring, which can corrupt DMA page reference counts and lead to SLUB freelist corruption. Commit 4e910dbe3650 ("qede: confirm skb is allocated before using") added a NULL check inside qede_build_skb() to prevent a NULL pointer dereference, but did not address the missing NULL checks in the callers, making this off-by-one reachable. Fix this by adding NULL checks for the return value of qede_build_skb() in both qede_rx_build_skb() and qede_tpa_rx_build_skb(), returning NULL immediately before any BD ring manipulation. Added Reference https://git.kernel.org/stable/c/07be8b8adf91b7ada4c3dacce064d572a6066421 Added Reference https://git.kernel.org/stable/c/0bf78df2d3ecb1f4964ff42a7327d25845955153 Added Reference https://git.kernel.org/stable/c/1624aa100c0b218181aa74e3696a389b509298cb Added Reference https://git.kernel.org/stable/c/814a5edac8c9fc04051808d5faaa93768e989281 Added Reference https://git.kernel.org/stable/c/982d6d6bc059c5dff37a2201c2f08c14bcfcbd20 Added Reference https://git.kernel.org/stable/c/a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f Added Reference https://git.kernel.org/stable/c/b066420e57f3402a52c998678b4678252ac9bb63 Added Reference https://git.kernel.org/stable/c/ecc05d4b20220a09c9c69584fc46ca55248a374a
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.