kernel: gro: only reset frag0 when skb can be pulled
Published Sep 6, 2011
5.7
MEDIUMCVSS 2.0
EPSS 1.11%
Description
The skb_gro_header_slow function in include/linux/netdevice.h in the Linux kernel before 2.6.39.4, when Generic Receive Offload (GRO) is enabled, resets certain fields in incorrect situations, which allows remote attackers to cause a denial of service (system crash) via crafted network traffic.
Affected products
No data.
- < 2.6.39.4
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-238.27.1.el5
Fixed · RHSA-2011:1321
Red Hat Enterprise Linux 5
kernel-0:2.6.18-274.7.1.el5
Fixed · RHSA-2011:1386
Red Hat Enterprise Linux 6
kernel-0:2.6.32-131.17.1.el6
Fixed · RHSA-2011:1350
Red Hat Enterprise MRG 2
kernel-rt-0:2.6.33.9-rt31.79.el6rt
Fixed · RHSA-2012:0010
Red Hat Enterprise Linux 4
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-238.27.1.el5 | Fixed | RHSA-2011:1321 |
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-274.7.1.el5 | Fixed | RHSA-2011:1386 |
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-131.17.1.el6 | Fixed | RHSA-2011:1350 |
| Red Hat Enterprise MRG 2 | kernel-rt-0:2.6.33.9-rt31.79.el6rt | Fixed | RHSA-2012:0010 |
| Red Hat Enterprise Linux 4 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not backport the upstream commit a5b1cf28 that introduced this issue. This has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-1386.html, https://rhn.redhat.com/errata/RHSA-2011-1350.html, and https://rhn.redhat.com/errata/RHSA-2012-0010.html.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:A/AC:M/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.11% (0.01106) | 64.60th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.11% (0.01106) | 61.43th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.84% (0.00842) | 73.11th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.72% (0.00718) | 81.23th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.77% (0.00769) | 80.66th | v3 (v2023.03.01) |
| Apr 6, 2023 | 0.77% (0.00769) | 78.60th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.84% (0.00840) | 79.50th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.97% (0.01974) | 78.97th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.97% (0.01974) | 78.46th | v2 (v2022.01.01) |
| Feb 3, 2023 | 3.78% (0.03779) | 85.12th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.97% (0.01974) | 77.12th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.97% (0.01974) | 56.20th | v2 (v2022.01.01) |
References (13)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=17dd759c67f21e34f2156abcf415e1f60605a188 x_refsource_CONFIRM
- http://git.kernel.org/linus/17dd759c67f21e34f2156abcf415e1f60605a188
- http://marc.info/?l=bugtraq&m=139447903326211&w=2 vendor-advisoryx_refsource_HPThird Party Advisory
- http://openwall.com/lists/oss-security/2011/07/28/13 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://openwall.com/lists/oss-security/2011/07/29/1 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://securitytracker.com/id?1025876 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.4 x_refsource_CONFIRMBroken Link
- http://www.redhat.com/support/errata/RHSA-2011-1321.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.securityfocus.com/bid/48929 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2011-2723 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=726552 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2011-2723
- https://www.cve.org/CVERecord?id=CVE-2011-2723
Change history (0)
No recorded changes yet.